If you have ever tried to find the right ICD 10 code for xanthoma, you already know it can feel confusing. Is it a skin disorder? A metabolic issue? A sign of high cholesterol?
The truth is, xanthomas can be all of these things. That is why picking the wrong code can lead to denied claims or inaccurate patient records.
This guide walks you through every important ICD 10 code for xanthoma. We will cover the different types, when to use each code, and how to document properly. By the end, you will feel confident coding for eyelid xanthomas, tendon bumps, eruptive lesions, and more.
What Exactly Is a Xanthoma?
A xanthoma is a localized collection of lipid-laden macrophages within the skin or tendons. In simpler terms, it is a fatty deposit that builds up under the skin. These deposits often appear as yellowish, firm nodules or plaques.
Xanthomas are not dangerous by themselves. However, they are important clinical markers. Most people who develop xanthomas have an underlying disorder of lipid metabolism. This includes:
- Familial hypercholesterolemia
- Primary biliary cholangitis
- Uncontrolled diabetes
- Certain lymphoproliferative disorders
Because xanthomas point to a systemic problem, the correct ICD 10 code xanthoma depends on both the type of lesion and the suspected cause.
Important note for coders: The ICD-10-CM system does not have a single “xanthoma” code. You must choose a code based on the specific subtype and location.
The Primary ICD 10 Code for Xanthoma (General)
Let us address the most common question first.
If a physician documents “xanthoma” without further specification, the appropriate code is:
H02.6 – Xanthoma of the eyelid and periocular area
Wait — why does the general code default to the eyelid? That is a fair question. In practice, when a doctor writes “xanthoma” alone, they most often mean xanthelasma (eyelid xanthoma). The ICD-10-CM index directs coders to H02.6 for unspecified xanthoma of the eyelid region.
But what about xanthomas on the elbow or Achilles tendon? Those require different codes.
Here is a quick reference table:
| Clinical Description | Correct ICD-10 Code |
|---|---|
| Xanthoma of eyelid (xanthelasma) | H02.6 |
| Xanthoma, unspecified site (rarely used) | E78.2 (mixed hyperlipidemia) with additional code |
| Tuberous xanthoma | E78.2 + L92.8 (other granulomatous disorders of skin) |
| Eruptive xanthoma | E78.2 + L92.8 |
| Tendinous xanthoma | E78.2 + M67.8 (other specified disorders of synovium/tendon) |
We will break each of these down.
Eyelid Xanthoma (Xanthelasma): H02.6
Xanthelasma palpebrarum is the most common form of xanthoma that brings patients to a clinic. These are soft, yellow, flat plaques on the upper or lower eyelids, usually near the inner corner.
When to use H02.6
Use H02.6 when:
- The lesion is clearly on the eyelid skin
- The pathology report confirms lipid deposits
- The physician documents “xanthelasma” or “eyelid xanthoma”
What not to code with H02.6
Do not use H02.6 for:
- Xanthomas on other body parts
- Lesions that are painful, red, or rapidly changing (consider eruptive xanthoma instead)
- Swellings that involve deeper tendon structures
Documentation tip for H02.6
Your documentation should always note:
- Exact location (right upper lid, left lower lid, bilateral)
- Size and appearance
- Whether this is a recurrence after previous removal
Example note: “Soft yellow plaque on the right upper eyelid, medial aspect. No tenderness. Consistent with xanthelasma.”
Tuberous Xanthoma: Coding for Firm Nodules on Pressure Points
Tuberous xanthomas appear as firm, painless nodules on pressure areas. You will often see them on elbows, knees, buttocks, and heels. They can be quite large, sometimes exceeding 2 cm.
The correct combination
Because tuberous xanthomas are a cutaneous manifestation of a lipid disorder, you will need two codes:
- E78.2 – Mixed hyperlipidemia
- L92.8 – Other granulomatous disorders of the skin and subcutaneous tissue
Alternatively, if the patient has a specific lipid disorder like familial hypercholesterolemia, use E78.01 (familial hypercholesterolemia) instead of E78.2.
Why two codes?
The first code (E78.2 or E78.01) captures the underlying metabolic condition. The second code (L92.8) captures the skin lesion itself. This dual coding tells the full clinical story.
Eruptive Xanthoma: Coding for Acute Outbreaks
Eruptive xanthomas look different from other types. They appear as small, red-yellow papules with a red halo. They often crop up in clusters on the buttocks, shoulders, arms, or back. These lesions can be itchy or tender.
When to suspect eruptive xanthoma
This form is strongly associated with:
- Very high triglyceride levels (often above 1,500 mg/dL)
- Uncontrolled diabetes mellitus
- Certain medications (estrogens, retinoids, protease inhibitors)
The correct ICD 10 code for eruptive xanthoma
Primary code: E78.2 (Mixed hyperlipidemia) or E78.1 (Pure hyperglyceridemia)
Secondary code: L92.8 (Other granulomatous disorders of the skin)
If the patient has diabetic dyslipidemia, you may also add E11.69 (Type 2 diabetes mellitus with other specified complication).
Important clinical note
Eruptive xanthomas often resolve when triglyceride levels come down. However, the skin changes can persist for weeks. Code based on the active lesions at the time of visit.
Tendinous Xanthoma: Coding for Deep Tendon Deposits
Tendinous xanthomas are not visible as skin bumps in the same way. Instead, they cause thickening of the tendons. The Achilles tendon is the most common site. You may also see them on the extensor tendons of the hands or the patellar tendon.
The correct code
For tendinous xanthoma, use:
E78.2 (Mixed hyperlipidemia)
M67.8 – Other specified disorders of synovium and tendon
Why M67.8?
Tendinous xanthomas are essentially lipid deposits within the tendon sheath. The ICD-10-CM system classifies them under “other specified disorders of tendon.” M67.8 is the appropriate capture code.
A warning for coders
Do not confuse tendinous xanthoma with:
- Tendonitis (M77.1 for Achilles tendinitis)
- Xanthoma of the skin near a tendon (that is still L92.8)
If the lesion involves skin and tendon together, code both L92.8 and M67.8.
Plane Xanthoma: A Less Common But Important Type
Plane xanthomas are flat, yellow patches that can appear on the palms, neck, chest, or in skin folds. The palmar form (xanthoma striatum palmaris) is particularly noteworthy because it is often linked to dysbetalipoproteinemia (type III hyperlipoproteinemia).
The correct ICD 10 code for plane xanthoma
For plane xanthoma of the palms or skin folds, use:
E78.2 (Mixed hyperlipidemia)
L92.8 (Other granulomatous disorders of the skin)
If the patient has confirmed dysbetalipoproteinemia, use E78.2 (which includes this condition by default in many coding guidelines) or E78.1 as appropriate.
Why plane xanthoma matters for diagnosis
Plane xanthomas, especially on the palms, strongly suggest a specific genetic lipid disorder. Your documentation should always mention the location and note whether the patient has a family history of early heart disease.
Coding Xanthomas in Children
Xanthomas in pediatric patients are rare but important. They almost always indicate a severe inherited lipid disorder such as homozygous familial hypercholesterolemia.
Common codes for pediatric xanthomas
- E78.01 – Familial hypercholesterolemia
- H02.6 – For eyelid lesions
- L92.8 – For cutaneous xanthomas elsewhere
A word of caution
Do not assign adult metabolic codes (like E78.2 without specification) to children without clear documentation. Pediatric xanthomas require a careful workup. If the workup is incomplete, code only the physical finding.
The Role of Additional Codes for Underlying Conditions
Xanthomas are never the whole story. To code responsibly, you must also capture the underlying disorder. Here are common associated conditions and their codes:
| Underlying Condition | ICD-10 Code |
|---|---|
| Familial hypercholesterolemia | E78.01 |
| Familial combined hyperlipidemia | E78.4 |
| Pure hyperglyceridemia | E78.1 |
| Mixed hyperlipidemia | E78.2 |
| Primary biliary cholangitis | K74.5 |
| Uncontrolled diabetes with dyslipidemia | E11.69 |
| Obesity contributing to dyslipidemia | E66.9 |
| Hypothyroidism (lipid disturbance) | E03.9 |
Always sequence the codes correctly. The xanthoma code usually comes secondary to the metabolic code, unless the visit is specifically for removal of the xanthoma (then the lesion code is primary).
When the Underlying Cause Is Unknown
Sometimes a patient presents with a xanthoma, but the workup has not yet identified a cause. What do you do?
In this situation, code the lesion based on its type and location. Do not guess at a metabolic code.
Example: A patient has a single tuberous xanthoma on the elbow. No lipid panel has been drawn yet.
Correct coding: L92.8 (Other granulomatous disorders of the skin)
Incorrect coding: E78.2 (you cannot assume hyperlipidemia without evidence)
Once labs confirm high cholesterol or triglycerides, you can add the metabolic code on a subsequent claim.
Documentation Best Practices for Xanthoma Coding
Good documentation protects your practice and helps patients. Here is what every note should include:
For any xanthoma
- Exact location (measure in cm if possible)
- Description of color, texture, and borders
- Whether the lesion is tender, itchy, or asymptomatic
- Onset (sudden vs. gradual)
- Prior treatments or removals
For suspected metabolic causes
- Fasting lipid panel results (total cholesterol, LDL, HDL, triglycerides)
- Family history of early heart disease or high cholesterol
- Presence of other stigmata (corneal arcus, tendon thickening)
- Blood glucose or HbA1c to rule out diabetes
Example of excellent documentation
*”42-year-old male with new onset yellow papules on bilateral buttocks. Lesions are 2-3 mm, red-yellow, mildly tender. Fasting triglycerides drawn today are 2,100 mg/dL. Patient has known type 2 diabetes with HbA1c of 9.8%. No prior history of pancreatitis. Assessment: Eruptive xanthoma secondary to diabetic dyslipidemia.”*
From that note, you can confidently code E11.69, E78.2, and L92.8.
Billing and Reimbursement Tips
Insurance companies scrutinize xanthoma codes because they often involve both dermatology and metabolic management.
For excision or destruction of xanthomas
If the patient sees a dermatologist for removal, the procedure code (CPT) drives the visit. Common CPT codes include:
- 11440-11446 – Excision of benign lesion, eyelid
- 17110 – Destruction of benign lesions, up to 14 lesions
The ICD-10 code should support medical necessity. For eyelid xanthelasma removal, H02.6 is appropriate. However, some payers require a metabolic code as well. Check your local coverage determinations.
When a payer denies a xanthoma code
Denials often happen for two reasons:
- Lack of specificity – “Xanthoma” alone is not enough. Use the subtype.
- Missing metabolic link – For non-eyelid xanthomas, add E78.2 or the appropriate lipid disorder code.
Pro tip: If you are coding for a xanthoma removal, attach the pathology report. Pathology confirming lipid-laden histiocytes is the gold standard for medical necessity.
Common Coding Mistakes and How to Avoid Them
Even experienced coders sometimes slip up. Here are the most frequent errors:
Mistake 1: Using E78.2 for every xanthoma
Not all xanthomas require E78.2. Isolated xanthelasma in a patient with normal lipids does not justify a hyperlipidemia code. Code only what is documented and supported.
Mistake 2: Forgetting the lesion code
Some coders assign only E78.2 and stop. But E78.2 alone does not describe the xanthoma. Add L92.8, M67.8, or H02.6 as appropriate.
Mistake 3: Confusing xanthoma with other diagnoses
These are not xanthomas:
- Juvenile xanthogranuloma (use D76.3)
- Necrobiosis lipoidica (use L92.1)
- Gouty tophi (use M1A. code series)
When in doubt, check the pathology report.
A Complete Coding Example Walkthrough
Let us put everything together with a realistic patient scenario.
Patient presentation:
A 55-year-old woman comes to clinic with yellowish lumps on both elbows. She says the lumps have been slowly growing for two years. She also mentions that her father died of a heart attack at age 52. On exam, you find firm, non-tender nodules on the extensor surfaces of both elbows, each about 1.5 cm. Labs show LDL 210 mg/dL, triglycerides 180 mg/dL.
Assessment: Tuberous xanthomas secondary to probable familial hypercholesterolemia.
Correct ICD-10 codes:
- E78.01 – Familial hypercholesterolemia
- L92.8 – Other granulomatous disorders of the skin (for the tuberous xanthomas)
Why not E78.2? Because the LDL is isolated high with normal triglycerides. E78.01 is more specific.
CPT codes (if removing one lesion for biopsy): 11440 (excision benign lesion, trunk/arms/extremities)
Quick Reference: ICD 10 Code Xanthoma by Type
Use this table for fast lookup:
| Xanthoma Type | Common Sites | Primary ICD-10 Code | Secondary Code (if needed) |
|---|---|---|---|
| Xanthelasma | Eyelids | H02.6 | None usually |
| Tuberous | Elbows, knees, buttocks | E78.01 or E78.2 | L92.8 |
| Eruptive | Buttocks, shoulders, arms | E78.1 or E78.2 | L92.8 |
| Tendinous | Achilles, hand tendons | E78.01 or E78.2 | M67.8 |
| Plane (palmar) | Palms, neck, folds | E78.2 | L92.8 |
| Unspecified cutaneous | Any skin site | L92.8 | E78.2 if documented |
Future Changes to Xanthoma Coding
ICD-10-CM updates every October. While xanthoma codes have been stable for several years, watch for:
- Possible new codes for specific genetic lipid disorders
- Refinements to L92.8 (other granulomatous disorders)
Always use the current year’s code set. For 2024 and 2025, the codes above remain accurate.
Final Clinical Pearl for Healthcare Providers
Remember this: a xanthoma is a clinical sign, not a final diagnosis. When you find one, ask yourself:
- Does this patient have a family history of high cholesterol or early heart attacks?
- Have we checked a fasting lipid panel in the last year?
- Could this be a sign of undiagnosed diabetes or liver disease?
Your thoroughness can save lives. Many patients with xanthomas have silent but treatable cardiovascular risk.
Conclusion
To summarize, there is no single ICD 10 code xanthoma for every situation. Eyelid xanthelasma uses H02.6. Cutaneous xanthomas on the body use E78.2 (or a specific lipid disorder code) plus L92.8. Tendinous xanthomas use E78.2 plus M67.8. Always document the lesion type, location, and underlying metabolic status. Good coding leads to accurate records, proper reimbursement, and better patient care.
Frequently Asked Questions (FAQ)
1. What is the most common ICD 10 code for xanthoma?
The most common code is H02.6, which covers xanthelasma (eyelid xanthoma). For other body sites, the combination of E78.2 + L92.8 is frequently used.
2. Can I use H02.6 for xanthomas on the cheek or forehead?
No. H02.6 is specifically for the eyelid area. A xanthoma on the cheek requires a cutaneous lesion code (L92.8) plus an underlying lipid code.
3. Is E78.2 always required for xanthoma coding?
No. If a patient has a xanthoma but normal lipid levels and no diagnosed metabolic disorder, code only the lesion. Do not assume hyperlipidemia.
4. What is the difference between E78.01 and E78.2?
E78.01 is familial hypercholesterolemia (high LDL). E78.2 is mixed hyperlipidemia (high LDL + high triglycerides). Use the one that matches the lab results and documentation.
5. How do I code an eruptive xanthoma that is healing?
If the lesions are still present and visible, code them as active. If they have completely resolved, you do not need a lesion code for a follow-up visit focused on lipid management.
6. What code should I use for a xanthoma on the Achilles tendon?
Use E78.01 or E78.2 (based on lipid profile) plus M67.8 (other specified disorders of tendon).
7. Do xanthomas require a biopsy code in addition to the lesion code?
No. The biopsy is a procedure (CPT). The ICD-10 code supports the medical necessity for the biopsy. Do not confuse diagnosis codes with procedure codes.
8. Can pediatricians use these same codes for children with xanthomas?
Yes, but with caution. Always prioritize the underlying genetic condition (e.g., E78.01 for homozygous familial hypercholesterolemia) and avoid adult metabolic codes without clear evidence.
Additional Resource
For the most current ICD-10-CM official guidelines for coding and reporting, refer to the Centers for Medicare & Medicaid Services (CMS) ICD-10 webpage.
👉 Link: www.cms.gov/medicare/coding-billing/icd-10-codes
This official resource provides yearly updates, coding conventions, and chapter-specific guidelines.
Disclaimer: This article is for informational and educational purposes only. It does not constitute medical advice, legal advice, or definitive coding guidance. Third-party payers may have specific local coverage determinations. Always consult the current official ICD-10-CM manual and a certified medical coder for individual patient scenarios.
