The Ultimate Guide to CPT Coding for Wrist Arthroscopy

The human wrist is a masterpiece of biological engineering. It is not a single joint but a complex articulation of eight carpal bones, interconnected by a web of ligaments, tendons, and nerves, all working in concert to provide an astonishing range of motion and precise function. This complexity, however, makes it uniquely vulnerable to a wide array of injuries and degenerative conditions. When pain, instability, or loss of function occurs, diagnosing and treating the problem was historically a significant challenge for orthopedic surgeons, often requiring large, open incisions with prolonged recovery times.

The advent of wrist arthroscopy revolutionized this field. By utilizing a miniature camera (arthroscope) inserted through tiny keyhole incisions, surgeons can now visualize, diagnose, and treat pathologies within the wrist joint with unparalleled precision and minimal tissue disruption. This technological leap has improved patient outcomes dramatically, but it has also introduced a parallel layer of complexity for the medical coders and billers who translate these sophisticated procedures into the language of healthcare reimbursement: Current Procedural Terminology (CPT) codes.

Accurate coding for wrist arthroscopy is not merely an administrative task; it is a critical function that ensures healthcare providers are appropriately compensated for their specialized skills and resources, while simultaneously maintaining strict compliance with ever-evolving payer rules and regulations. A miscoded claim can lead to denied reimbursements, audits, and significant financial penalties. This comprehensive guide is designed to be an exhaustive resource, delving deep into the nuances of CPT codes 29840 through 29848. We will explore the anatomy of the wrist, the specifics of each procedural code, the intricate rules of bundling and modifiers, and the paramount importance of detailed operative documentation. Our goal is to equip you with the knowledge to navigate this complex subspecialty with confidence, precision, and expertise.

2. Understanding the Fundamentals: What is Wrist Arthroscopy?

Wrist arthroscopy is a minimally invasive surgical procedure that allows an orthopedic surgeon to examine, diagnose, and treat problems inside the wrist joint. The term itself is derived from the Greek words “arthro” (joint) and “skopein” (to look). The procedure essentially provides a direct internal view of the joint, far superior to what can be achieved with external examination or standard imaging like X-rays or even MRIs.

The Procedure Workflow:

1. Anesthesia: The procedure is typically performed under regional block (e.g., axillary or Bier block) or general anesthesia.
2. Traction: The arm is prepared and placed in a traction device that suspends the hand and distracts the wrist joint. This creates space between the bones, allowing the arthroscope and instruments to be maneuvered safely without damaging the cartilage surfaces.
3. Portal Placement: The surgeon makes several small incisions, about 4-5 mm in length, around the wrist. These entry points are called “portals.” Their placement is not random; they are meticulously mapped to avoid nerves, blood vessels, and tendons. Common portals include the 3-4 portal (between the 3rd and 4th extensor compartments), the 4-5 portal, and the 6R portal.
4. Joint Insufflation: Saline solution is pumped into the joint to expand it, providing a clearer viewing field and controlling minor bleeding.
5. Arthroscopic Examination: The arthroscope, a fiber-optic tube connected to a video camera, is inserted through one portal. The high-definition images are displayed on a monitor, giving the surgeon a magnified, panoramic view of the internal structures of the wrist: the cartilage, ligaments, bones (carpals, distal radius, and ulna), and the triangular fibrocartilage complex (TFCC).
6. Surgical Intervention: If a problem is identified, specialized miniature instruments (shavers, probes, graspers, cutters, and electrocautery devices) are inserted through the other portals to perform the necessary repair. These can include smoothing ragged cartilage, removing inflamed tissue, repairing torn ligaments, or stabilizing fractures.
7. Closure: The instruments are removed, the saline is drained, and the tiny incisions are closed with sutches or steri-strips, often leaving barely noticeable scars.

Common Indications for Wrist Arthroscopy:

• Diagnosis of Unexplained Wrist Pain: When physical exam and imaging are inconclusive.
• Triangular Fibrocartilage Complex (TFCC) Tears: A common cause of ulnar-sided (pinky-side) wrist pain.
• Synovitis: Removal of inflamed synovial tissue (as in rheumatoid arthritis).
• Ligament Tears (e.g., Scapholunate Ligament): Assessment and repair of carpal instability.
• Cartilage Injuries (Chondral Defects): Debridement or microfracture.
• Ganglion Cyst Excision: Particularly dorsal wrist ganglia.
• Distal Radius Fracture Management: To assess intra-articular step-off and assist in reduction.
• Septic Arthritis: Irrigation and debridement for infection.
• Removal of Loose Bodies: Bone or cartilage fragments floating within the joint.

3. The CPT® Coding System: A Primer for Orthopedic Coding

The Current Procedural Terminology (CPT®) code set, published and maintained by the American Medical Association (AMA), is the universal language for reporting medical, surgical, and diagnostic services to insurers in the United States. It is a system of five-digit numeric codes that provides a standardized description for each procedure or service. For surgical procedures, codes are largely organized by anatomical site and type of procedure.

CPT codes are divided into three categories:

• Category I: These are the core codes used for reporting procedures and services performed by physicians. The wrist arthroscopy codes (29840-29848) are Category I codes.
• Category II: Supplemental tracking codes used for performance management. They are optional and not used for reimbursement.
• Category III: Temporary codes for emerging technologies, services, and procedures. They allow for data collection on new procedures that do not yet have a permanent Category I code.

A fundamental principle of CPT coding is “bundling.” Many surgical procedures have inherent components. For example, a surgical arthroscopy code (e.g., 29846 for a TFCC repair) includes the surgical work, but it also inherently includes the diagnostic arthroscopy that was performed first to identify the problem. Therefore, you would never report a diagnostic code (29840) with a surgical code (29843-29848) for the same wrist. The diagnostic procedure is considered bundled into the more comprehensive surgical procedure. We will explore this in greater depth in a dedicated section.

4. Deconstructing the Primary Wrist Arthroscopy Codes: 29840-29848

The family of codes for wrist arthroscopy is structured hierarchically, moving from diagnostic to increasingly complex surgical interventions. Understanding the specific descriptor for each code is the first and most critical step in accurate coding.

Code 29840: Arthroscopy, wrist, diagnostic, with or without synovial biopsy (separate procedure)

• Descriptor: This code is used only when the arthroscopy is performed for diagnostic purposes and no other surgical procedure is performed. If the diagnostic arthroscopy leads to a decision to perform a surgical procedure (e.g., synovectomy, TFCC repair), you code only the surgical procedure. Code 29840 is bundled into all other wrist arthroscopy codes.
• “Separate Procedure” Designation: This label in the code descriptor means that 29840 is intended to be reported only when it is the only procedure performed on the wrist. If it is performed as a necessary first step in a larger surgical arthroscopy, it is not reported separately.
• When to Use It: Report 29840 when the surgeon inserts the scope, visualizes the structures, and perhaps takes a biopsy of the synovium, but then concludes the procedure without performing any other surgical intervention like debridement, repair, or excision.

Code 29843: Arthroscopy, wrist, surgical for infection, lavage and drainage

• Descriptor: This is a very specific code for the surgical treatment of a septic (infected) wrist joint. The procedure involves copious irrigation (lavage) of the joint with saline solution and drainage of infectious material (pus).
• Key Differentiator: This code is not for simple irrigation; it is explicitly for a confirmed or suspected infection. The documentation must support this indication (e.g., “purulent fluid encountered,” “patient with septic arthritis,” “culture samples sent”).
• Bundling: If a synovectomy (partial or complete) is performed during the same session for the infected joint, it may be bundled or may require modifier use depending on CCI edits.

Code 29844: Arthroscopy, wrist, surgical; synovectomy, partial

Code 29845: Arthroscopy, wrist, surgical; synovectomy, complete

• Descriptors: These codes involve the removal of inflamed synovial tissue (the lining of the joint). The differentiation between partial (29844) and complete (29845) is crucial.
• Documentation Requirement: The surgeon’s operative report must explicitly state the extent of the synovectomy. Terms like “partial synovectomy,” “debridement of inflamed synovium from the radiocarpal joint,” or “synovectomy of the radial side” would support 29844. Terms like “complete synovectomy,” “extensive synovectomy of both radiocarpal and midcarpal joints,” or “total synovectomy performed” are necessary to justify the use of 29845.
• Clinical Context: Synovectomy is commonly performed for inflammatory arthritides like Rheumatoid Arthritis.

Code 29846: Arthroscopy, wrist, surgical; excision and/or repair of triangular fibrocartilage and/or joint surface injury

• Descriptor: This is one of the most commonly used and complex codes in the set. It covers a wide range of procedures involving two key structures:
  1. Triangular Fibrocartilage Complex (TFCC): This can include debridement (shaving away torn, ragged pieces) or repair (suturing the torn tissue back to bone or ligament).
  2. Joint Surface Injury: This refers to treatment of chondral (cartilage) lesions. This can include chondroplasty (smoothing of rough cartilage) or microfracture (creating small holes in the exposed bone to stimulate healing with a “super-clot”).
• Coding Nuance: A critical rule from the AMA CPT guidelines states: “Only one surgical procedure may be reported for a joint.” This means you report 29846 once, regardless of whether the surgeon performs one, two, or all the procedures listed under its descriptor (e.g., both a TFCC debridement and a chondroplasty in the same wrist during the same session). You cannot report 29846 twice.
• Laterality: Remember to append the correct laterality modifier (-LT for left, -RT for right).

Code 29847: Arthroscopy, wrist, surgical; internal fixation for fracture or instability

• Descriptor: This code is reserved for the most complex wrist arthroscopies. It involves the internal fixation of fractures or the stabilization of ligamentous instability.
• Fracture Examples: Percutaneous pinning or screw fixation of a distal radius fracture (e.g., die-punch fragment) or a scaphoid fracture assisted by arthroscopy.
• Instability Examples: Repair of scapholunate ligament tears with suture anchors or thermal shrinkage of ligaments to create stability.
• Bundling: This code includes all lesser procedures. If a fracture fixation is performed, any synovectomy or TFCC debridement done in the same joint is bundled into 29847.

The following table provides a quick-reference overview of these codes and their primary applications.

CPT Code Overview for Wrist Arthroscopy

CPT Code	Procedure Description	Key Clinical Indications	Bundling Considerations
29840	Diagnostic Arthroscopy (± biopsy)	Unexplained pain, diagnostic exploration	Bundled into all surgical arthroscopy codes (29843-29847).
29843	Surgical for Infection (lavage/drainage)	Septic arthritis, infected joint	Do not report with other surgical codes for the same joint.
29844	Partial Synovectomy	Removal of inflamed tissue in a specific area.	Bundled into 29845, 29846, 29847.
29845	Complete Synovectomy	Extensive removal of synovium (e.g., in RA).	Bundled into 29846 and 29847.
29846	Excision/Repair of TFCC and/or Joint Surface	TFCC tears (debridement/repair), cartilage injuries.	Report once per session. Includes any partial synovectomy.
29847	Internal Fixation for Fracture/Instability	Distal radius fx, scaphoid fx, ligament instability.	The most comprehensive code. Bundles all other arthroscopic procedures in the same joint.

5. Navigating the Labyrinth: Bundling, Modifiers, and Correct Coding Initiative (CCI) Edits

Understanding the codes themselves is only half the battle. The real challenge lies in applying the complex rules that govern how and when these codes can be reported together.

The Correct Coding Initiative (CCI):
The Centers for Medicare & Medicaid Services (CMS) developed the National Correct Coding Initiative (NCCI) to prevent improper coding and payment for Medicare and Medicaid claims. NCCI edits, updated quarterly, are sets of paired codes that generally should not be billed together for the same patient on the same day by the same provider. These edits are adopted by many private payers as well.

Types of Edits:

• Column 1/Column 2 (Comprehensive/Component) Edits: This is the most common type of bundling edit. If two codes are listed as an edit pair, the Column 2 code is considered a component of the more comprehensive Column 1 code and is not separately payable. For example:
  • Column 1: 29846 (TFCC repair)
  • Column 2: 29840 (Diagnostic arthroscopy) -> Bundled
  • Column 2: 29844 (Partial synovectomy) -> Bundled
• Mutually Exclusive Edits: These are pairs of codes that, for clinical reasons, cannot reasonably be performed at the same anatomical site at the same session (e.g., an excision and a repair of the exact same lesion).

Modifiers: The Key to Unbundling (When Appropriate)
While CCI edits bundle codes, there are circumstances where it may be appropriate to “unbundle” them and report both services. This is done using specific modifiers that indicate the circumstances were unusual. The use of a modifier overrides the CCI edit and tells the payer, “Yes, I know these are usually bundled, but here is why they should both be paid.”

The most important modifiers in arthroscopy coding are:

• Modifier 59 (Distinct Procedural Service): This is the most common modifier used to indicate that a procedure was distinct and independent from another procedure performed on the same day. Its use is highly scrutinized. To use -59, the procedures must be performed at different anatomical sites or different patient encounters. For wrist arthroscopy, this is very rare, as almost all procedures are within the same joint.
  • Example: A diagnostic arthroscopy (29840) of the radiocarpal joint and a surgical procedure (29846) in the midcarpal joint might be considered distinct if documented as separate and independent procedures. However, caution is advised, as many payers consider the entire wrist as one surgical field.
• Modifier 51 (Multiple Procedures): This modifier is applied to the secondary, tertiary, etc., procedures when multiple procedures are performed during the same surgical session. It signals to the payer to apply a multiple procedure discount (often a 50% reduction to the technical component of the lower-valued procedure). Importantly, -51 is used when the codes are not bundled by CCI. The primary procedure is listed first without a modifier.
• Modifier 50 (Bilateral Procedure): If the same procedure is performed on both the left and right wrist during the same operative session, you append modifier -50 to the code. For example, 29846-50. Some payers may want the code listed twice, once with -RT and once with -LT.

Crucial Point: The use of modifiers must be rigorously supported by the operative report’s documentation. Using a modifier without clear documentation is a compliance risk.

6. Documentation is King: What Surgeons Must Note for Accurate Coding

The operative report is the foundation of every claim. Without detailed, specific documentation, accurate coding is impossible. The coder cannot infer, assume, or extrapolate. Here is what must be explicitly documented for each procedure:

• Indication for Surgery: Why was the procedure performed? (e.g., “left wrist pain failing conservative management,” “suspected TFCC tear”).
• Anesthesia Type: General, regional, etc.
• Portals Used: (e.g., “3-4 portal, 4-5 portal, 6R portal established”).
• Diagnostic Findings: A systematic description of what was seen in each compartment (radiocarpal, midcarpal, DRUJ). This is the justification for the diagnostic code if used.
  • Good: “Arthroscope introduced into the radiocarpal joint. Significant synovitis noted on the dorsal capsule. The TFCC was noted to be torn at its radial attachment (Palmer 1B tear). The articular cartilage of the lunate was softened and fissured (Outerbridge grade III).”
• Surgical Actions Taken: A precise, step-by-step account of what was done.
  • For Synovectomy (29844/29845): “A mechanical shaver was used to perform a complete synovectomy of the radiocarpal joint, paying particular attention to the dorsal and volar synovial folds.”
  • For TFCC Debridement (29846): “The torn and unstable portion of the TFCC was débrided back to a stable rim using a 2.0 mm full-radius resector.”
  • For TFCC Repair (29846): “The TFCC was repaired using a suture-passing device. Two sutures were placed through the torn TFCC and tied down to the capsule through the 6U portal.”
  • For Chondroplasty/Microfracture (29846): “The unstable cartilage flap on the lunate was débrided. The exposed subchondral bone was then treated with microfracture using an awl. Multiple holes were created approximately 3-4 mm apart until fat droplets were visualized.”
  • For Fracture Fixation (29847): “The intra-articular fracture fragment was elevated under arthroscopic visualization. Reduction was achieved and held with two percutaneous 0.045 K-wires.”
• Implants Used: Note any suture anchors, screws, or other devices used, including manufacturer and product numbers if possible (for pass-through billing if applicable).
• Closure: How the portals were closed.

A strong coder-surgeon relationship is vital. Coders should feel empowered to query surgeons if the documentation is unclear or lacks the specificity needed to assign the most accurate code.

7. Case Studies: Applying CPT Codes to Real-World Scenarios

Let’s apply the rules to practical examples.

Case Study 1: The Diagnostic Turned Therapeutic

• Scenario: A patient has ulnar-sided wrist pain. An MRI suggests a TFCC tear but is not definitive. The surgeon performs a diagnostic wrist arthroscopy. The arthroscopy confirms a central degenerative tear of the TFCC (Palmer 1A). The surgeon then proceeds to debride the torn tissue back to a stable rim.
• Procedures Performed: Diagnostic arthroscopy, TFCC debridement.
• Incorrect Coding: 29840, 29846. This is incorrect because 29840 is bundled into 29846.
• Correct Coding: 29846 (with modifier -LT or -RT). The diagnostic portion is not separately reportable.

Case Study 2: Multiple Procedures in One Joint

• Scenario: A patient with rheumatoid arthritis has persistent wrist pain and swelling. The surgeon performs an arthroscopy. Findings include significant proliferative synovitis and a small, stable cartilage injury on the distal radius. The surgeon performs a complete synovectomy and then debrides the ragged cartilage on the radius.
• Procedures Performed: Diagnostic arthroscopy, complete synovectomy, chondroplasty.
• Incorrect Coding: 29845, 29846. This implies two separate surgical procedures were performed on the same joint, which violates the “one surgical procedure per joint” rule.
• Correct Coding: 29845 (Complete synovectomy). The chondroplasty is a minor procedure that is bundled into the more extensive synovectomy. Alternatively, if the synovectomy was partial and the chondroplasty was extensive, 29846 would be reported, as it includes “joint surface injury.” The coder must review the documentation to determine the “star” of the procedure.

Case Study 3: The Bilateral Case

• Scenario: A patient with bilateral wrist ganglia undergoes arthroscopic excision of both dorsal wrist ganglions on the same day.
• Procedures Performed: The same procedure (which would likely be reported with 29846, as the ganglion stalk is often related to the capsule/TFCC) on both wrists.
• Correct Coding: 29846-50 (Bilateral procedure). Alternatively, some payers may require: 29846-RT and 29846-LT. Check payer-specific guidelines.

8. The Financial Anatomy: RVUs, Reimbursement, and Payer Policies

Reimbursement for medical services is based on the concept of Relative Value Units (RVUs). The RVU system assigns a value to a CPT code based on three components:

1. Work RVU (wRVU): Reflects the physician’s time, skill, effort, and stress.
2. Practice Expense RVU (peRVU): Covers the cost of overhead (staff, equipment, supplies).
3. Malpractice RVU (mRVU): Covers the cost of professional liability insurance.

These RVUs are added together and multiplied by a conversion factor (a dollar amount set by Medicare and other payers) to determine the payment amount.

Example (Hypothetical 2025 Values):

• CPT 29840 (Diagnostic): Total RVU = 10.00 | Reimbursement = 10.00 * $40.00 = $400.00
• CPT 29846 (TFCC Repair): Total RVU = 22.00 | Reimbursement = 22.00 * $40.00 = $880.00

This demonstrates why it is financially and compliantly critical to code the correct surgical procedure rather than just the diagnostic code.

Payer Policies: Every insurance company (Medicare, Medicaid, Blue Cross, Aetna, etc.) publishes its own medical policies for procedures like wrist arthroscopy. These policies outline:

• Medical Necessity Criteria: The specific clinical circumstances under which they will pay for the procedure. They may require proof of failed conservative care (e.g., physical therapy, splinting, NSAIDs).
• Coding Guidelines: They may have specific rules about modifier use or which codes they bundle.
• Prior Authorization Requirements: Many payers require pre-approval for surgical arthroscopy.

The coder’s responsibility is to be familiar with the policies of the major payers in their region to ensure claims are not denied for lack of medical necessity.

9. Beyond the Basics: Associated Codes for Anesthesia, Imaging, and Global Periods

Coding for the surgeon’s fee is just one part of the process. A full claim involves other elements:

• Anesthesia: The anesthesia provider will report codes from the Anesthesia section of CPT (e.g., 01810 for anesthesia for procedures on tendons of wrist).
• Surgical Supplies: Implants (suture anchors, screws) may be billed separately if they are not included in the practice expense of the CPT code. This is known as “pass-through” billing and is highly payer-specific.
• Imaging: Fluoroscopy (C-arm) used during the procedure for fracture cases is often reported separately (e.g., 77002 – Fluoroscopic guidance for needle placement).
• Global Surgical Package: Most surgical codes include a “global period” (0, 10, or 90 days). This means the surgeon’s fee covers the procedure itself and all normal, related postoperative care during that period. Follow-up visits, dressing changes, and suture removal within the global period are not separately billable. Wrist arthroscopy codes typically have a 90-day global period.

10. The Future of Wrist Arthroscopy Coding: Trends and Technologies

The field is constantly evolving, and coding must keep pace.

• New Technology: Procedures like arthroscopic scapholunate ligament reconstruction with new suture tape systems or arthroscopic total wrist fusion are becoming more common. These may be reported with unlisted procedure codes (e.g., 29999) until specific CPT codes are created.
• Value-Based Care: There is a shift from fee-for-service to value-based reimbursement, where payment is tied to patient outcomes and cost-effectiveness. Accurate coding and documentation of outcomes will become even more critical.
• Artificial Intelligence (AI): AI-powered coding assistants are emerging to help review op-notes and suggest codes, but the human coder’s expertise in interpreting context and applying guidelines will remain indispensable.
• Increased Scrutiny: As healthcare costs rise, audits (from RACs, MACs, and private payers) will continue to increase. Robust documentation and meticulous coding are the best defenses.

11. Conclusion: Mastering the Art and Science of Coding

Accurate CPT coding for wrist arthroscopy is a sophisticated blend of anatomical knowledge, procedural understanding, and regulatory expertise. It requires a meticulous approach to the operative report, a deep understanding of CCI edits and modifier applications, and constant vigilance regarding payer-specific policies. By moving beyond simple code lookup and embracing the nuances of this specialty, coders become invaluable partners in ensuring both financial stability and unwavering compliance for their practices.

12. Frequently Asked Questions (FAQs)

Q1: Can I bill 29840 and 29846 together if the surgeon documents a detailed diagnostic exam before deciding to repair the TFCC?
A: No. According to CPT guidelines, a surgical arthroscopy always includes a diagnostic arthroscopy. Code 29840 is bundled into 29846 and is not separately reportable.

Q2: The surgeon performed a synovectomy in the radiocarpal joint and a TFCC debridement in the distal radioulnar joint (DRUJ). Can I report both 29845 and 29846 with modifier 59?
A: This is a complex, gray-area scenario. While the radiocarpal and DRUJ are technically different compartments, many CCI edits and payer policies consider the “wrist” as a single anatomical site. You should only consider this if the operative report explicitly documents the procedures as separate and distinct, performed in different joints, and if the work involved was truly additional. Always check the most current CCI edits and be prepared to appeal with detailed documentation. Most experts would advise reporting only the more comprehensive code (likely 29846).

Q3: What code do I use for an arthroscopic ganglion cyst excision?
A: There is no specific code for this. The procedure is almost always reported with 29846. This is because the excision involves resection of the ganglion stalk, which is typically connected to the joint capsule or a ligament (often the scapholunate ligament or TFCC). The work involved is consistent with the descriptor of 29846.

Q4: How do I code for an arthroscopy that is performed to assist in the reduction of a distal radius fracture?
A: If the arthroscopy is used solely to visualize the joint surface to ensure an anatomical reduction of the fracture, and no other surgical arthroscopic procedure (like a synovectomy or TFCC repair) is performed, you would report 29847 (internal fixation for fracture). The fracture fixation itself (e.g., open treatment with internal fixation) would be reported with a separate code from the fracture section (e.g., 25609). Modifier 51 may need to be applied to the second code.

Q5: What is the global period for wrist arthroscopy codes?
A: The surgical wrist arthroscopy codes (29843-29847) have a 90-day global surgical period. This means the surgeon’s fee covers all related postoperative care for the 90 days following the surgery. The diagnostic code 29840 has a 10-day global period.

13. Additional Resources

• American Medical Association (AMA): For purchasing the official CPT® codebook and accessing the latest guidelines. https://www.ama-assn.org
• Centers for Medicare & Medicaid Services (CMS): For NCCI edits, Medicare policies, and fee schedules. https://www.cms.gov
• American Academy of Professional Coders (AAPC): For professional certification, networking, and continuing education. https://www.aapc.com
• American Society for Surgery of the Hand (ASSH): For clinical resources and information that can aid in understanding procedures. https://www.assh.org
• Payer Medical Policies: Always reference the individual websites of Medicare Administrative Contractors (MACs) and private insurers (e.g., UnitedHealthcare, Aetna, Blue Cross Blue Shield) for their specific coverage policies on wrist arthroscopy.

Date: September 8, 2025
Author: The Medical Coding Specialist Team
Disclaimer: This article is for informational and educational purposes only. It is not a substitute for professional medical coding, billing, or legal advice. CPT® codes are proprietary to the American Medical Association (AMA). Medical coders must purchase a license from the AMA and use the most current, official CPT® code books and guidelines for accurate coding. Always consult with a qualified healthcare attorney or certified professional coder for specific guidance. The information presented here is based on 2025 CPT® guidelines, which are subject to change.