If you are reading this, you likely need to find the correct ICD-10 code for a patient who no longer has a liver. Maybe you are a medical coder, a biller, or a healthcare professional reviewing patient charts. You might feel a bit confused because this situation is not common.
Let us be honest. The human body usually cannot survive without a liver. So, why does this code exist? And when should you actually use it?
This guide will walk you through everything you need to know. We will keep the language simple and clear. By the end of this article, you will feel confident finding and applying the correct code. No fluff. No confusion. Just practical answers.
What Does “Acquired Absence of Liver” Really Mean?
Before we jump into the code, let us understand the term. The word “acquired” means the person was not born without the liver. Instead, they lost it due to a medical event later in life.
The liver is a vital organ. You cannot live without a functioning liver. So, what does this code describe?
In clinical practice, this code applies to patients who have undergone a total hepatectomy (complete removal of the liver) as part of a liver transplant procedure. During a transplant, the surgeon removes the diseased liver. Then, they implant a donor liver. For a short period, the patient lives without a native liver.
Important Note: This code does not apply to patients born without a liver (aplasia). It also does not apply to partial liver removals. We will discuss those differences later.
When Is This Code Relevant?
You will use this code in very specific situations:
- A patient has their diseased liver removed.
- The new liver is not yet implanted.
- Or, the patient has a history of total liver removal.
For transplant patients, the “acquired absence” exists between the time of removal and the time of transplantation. You might also see this code used for patients who had a transplant years ago. In that case, the code indicates they no longer have their original liver.
The Correct ICD-10 Code for Acquired Absence of Liver
Here is the answer you came for.
The correct ICD-10 code is Z90.8.
The full descriptor is: Acquired absence of other organs.
Why Not a Specific Liver Code?
You might wonder, “Why isn’t there a specific code just for the liver?” That is a fair question. ICD-10-CM has specific codes for acquired absence of other organs. For example:
- Z90.01 – Acquired absence of breast
- Z90.2 – Acquired absence of lung [part of]
- Z90.5 – Acquired absence of kidney
However, the liver does not have its own unique code. Instead, it falls under the “other organs” category. That is why we use Z90.8.
Breaking Down the Code Z90.8
Let us look at the code structure. This will help you remember it.
| Code | Category | Description |
|---|---|---|
| Z90 | Acquired absence of organs, not elsewhere classified | This is the parent category. |
| Z90.8 | Acquired absence of other organs | This includes the liver, pancreas, spleen, and others. |
Official ICD-10-CM Includes Under Z90.8:
- Acquired absence of pancreas
- Acquired absence of spleen
- Acquired absence of liver
- Acquired absence of fallopian tubes (acquired)
So, when you see Z90.8, you know it covers the liver.
Clinical Scenarios Where You Use Z90.8
Let us make this practical. Here are real-world examples. Read each scenario carefully.
Scenario 1: Liver Transplant – The Window Period
A 54-year-old patient with end-stage liver disease due to hepatitis C undergoes a total hepatectomy. The surgeon removes the entire diseased liver. The patient is now on a machine that supports blood filtration (like a dialysis-type system for the liver). The transplant team is waiting for the donor liver to arrive.
Diagnosis: Acquired absence of liver (during transplant procedure)
Correct Code: Z90.8
Additional Codes: You must also code the reason for the transplant. In this case, you would add K74.6 (Other and unspecified cirrhosis of liver) or the specific code for the liver disease.
Scenario 2: History of Liver Transplant
A 32-year-old patient visits their primary care doctor for a routine check-up. The patient had a successful liver transplant five years ago. The doctor notes that the patient’s native liver is gone. The transplanted liver is functioning well.
Diagnosis: Acquired absence of native liver (history)
Correct Code: Z90.8
Additional Codes: You would also code Z94.4 (Liver transplant status). This tells the insurance company that the patient has a transplanted organ.
Scenario 3: Liver Removal Without Transplant (Rare)
This is extremely rare. A patient has a massive liver tumor that does not respond to treatment. The tumor causes uncontrollable bleeding. The surgical team performs a total hepatectomy to save the patient’s life, but a donor organ is not available. The patient is kept alive temporarily with artificial support.
Diagnosis: Acquired absence of liver
Correct Code: Z90.8
Warning: This scenario is almost never elective. It is a last-resort, emergency procedure.
What Codes to Avoid (Common Mistakes)
Now, let us talk about errors. Even experienced coders sometimes make these mistakes. Avoid them.
Mistake 1: Using Q44.7 (Congenital absence of liver)
| Code | Meaning | Why It Is Wrong |
|---|---|---|
| Q44.7 | Congenital absence of liver (born without it) | Our topic is “acquired.” This is a birth defect. The patient was born with a liver and then lost it. |
Do not use Q44.7 unless the patient was born without a liver. That is a completely different condition.
Mistake 2: Using Codes for Partial Removal
You might see a patient who had a liver resection. The surgeon removed a lobe or a segment due to a tumor. The patient still has most of their liver.
This is not acquired absence of the entire liver.
For partial removal, you code the reason for the surgery. For example, you would code C22.9 (Malignant neoplasm of liver) and then use a procedure code. You do not use Z90.8 for partial resections.
Mistake 3: Using Z90.8 as a Primary Diagnosis Incorrectly
Some payers may reject Z90.8 as the first-listed diagnosis. Always check your specific payer guidelines. Whenever possible, list the reason for the liver absence first. For example:
Correct Order:
- K74.6 (Cirrhosis of liver – reason for transplant)
- Z90.8 (Acquired absence of liver)
- Z94.4 (Liver transplant status)
The Importance of Accurate Coding for Acquired Liver Absence
You might ask, “Does this really matter? It is just a ‘Z’ code.”
Yes, it matters. Here is why:
1. Medical Necessity: Insurance companies need to understand why a patient needs certain services. A patient with acquired absence of the liver (Z90.8) has a completely different care plan than a patient with a healthy liver.
2. Quality Reporting: Hospitals track transplant outcomes. Accurate coding helps them report successful procedures.
3. Research and Public Health: Researchers study long-term outcomes for transplant patients. Without Z90.8, they cannot easily find patients who have undergone total hepatectomy.
4. Avoiding Denials: If you use the wrong code, insurance may deny the claim. They might say, “This patient never had liver removal.” Then, you waste time on appeals.
Documentation Tips for Healthcare Providers
If you are a physician or a nurse, you can help your coding team. Good documentation makes everyone’s job easier.
What to Write in the Medical Record
- Clearly state: “The patient’s native liver is absent.”
- Mention if the patient had a total hepatectomy.
- Specify if the patient has a history of liver transplant.
- Avoid vague terms like “liver issues.”
Example of Good Documentation
“The patient is a 45-year-old male with a history of end-stage liver disease secondary to alcoholic cirrhosis. He underwent a total hepatectomy with orthotopic liver transplant in 2019. The native liver is completely absent. The transplanted liver is functioning well today.”
That note gives the coder everything they need.
Comparing Acquired Absence Codes (A Handy Table)
Let us see how Z90.8 compares to other absence codes. This will help you see the big picture.
| ICD-10 Code | Organ | Specific to Liver? | Common Use Case |
|---|---|---|---|
| Z90.01 | Breast | Yes | Mastectomy history |
| Z90.2 | Lung (part of) | Yes | Lobectomy for cancer |
| Z90.5 | Kidney | Yes | Nephrectomy history |
| Z90.8 | Liver | No (grouped with others) | Total hepatectomy / transplant history |
| Z90.8 | Spleen | No | Splenectomy history |
| Z90.8 | Pancreas | No | Pancreatectomy history |
| Z90.89 | Other specified organs | No | Acquired absence of cervix, uterus, etc. |
Notice how the liver is not special in the coding book. It shares the same code as the spleen and pancreas.
Step-by-Step Guide to Coding Acquired Absence of Liver
Follow this simple checklist. It will help you every time.
Step 1: Confirm Total Absence
- Did the patient have the entire liver removed?
- If only a part is missing, stop. Do not use Z90.8.
Step 2: Confirm Acquired Status
- Was the patient born without a liver? (Use Q44.7)
- Did they lose it later? (Use Z90.8)
Step 3: Identify the Reason for Removal
- Find the underlying condition. Example: cirrhosis, cancer, acute liver failure.
- Code that condition first (if required by your guidelines).
Step 4: Add Transplant Status if Applicable
- Does the patient have a transplanted liver?
- Add Z94.4 (Liver transplant status).
Step 5: Review for Exclusions
- Did the patient have a partial resection? (Do not use Z90.8)
- Is the patient currently in the operating room during the transplant? (Use the appropriate surgical codes plus Z90.8 for the short period of absence).
Frequently Asked Questions (FAQ)
Let us answer the most common questions people ask about this code.
Q1: Can you live without a liver?
No. The human body cannot survive without a liver. The code Z90.8 is used for patients who are temporarily without a liver during transplant surgery or for patients who have a transplanted liver and no longer have their original organ.
Q2: Is Z90.8 the same for adults and children?
Yes. The code Z90.8 does not specify age. However, for children, you must be careful. A child born without a liver would use Q44.7. A child who had a transplant uses Z90.8.
Q3: What is the difference between Z90.8 and Z90.89?
- Z90.8 = Acquired absence of other organs (includes liver, spleen, pancreas).
- Z90.89 = Acquired absence of other specified organs (includes uterus, cervix, ovary, fallopian tubes – but not liver).
Always use Z90.8 for the liver.
Q4: Can I use Z90.8 for a patient who had a liver lobectomy?
No. A lobectomy removes only a section of the liver. The patient still has functioning liver tissue. You would code the reason for the surgery (e.g., liver cancer). Do not use absence codes for partial removals.
Q5: Do I need a modifier with Z90.8?
Usually, no. Z90.8 is a standalone diagnosis code. However, for inpatient hospital coding, you might need to follow specific Medicare guidelines. Always check the latest ICD-10-CM Official Guidelines for Coding and Reporting.
Q6: What if the medical record says “post-hepatectomy status”?
Ask for clarity. Does “hepatectomy” mean complete removal? In many hospitals, “hepatectomy” refers to partial removal. Only “total hepatectomy” means the whole liver. Do not assume. If it says “total,” use Z90.8. If not, do not.
Q7: Does insurance usually pay for services when Z90.8 is billed?
It depends on the service. Z90.8 alone is not a reason for payment. The service (labs, imaging, office visit) must be medically necessary. Z90.8 explains why the patient needs follow-up care. Always pair it with a relevant reason code when possible.
Real-Life Coding Examples (For Practice)
Let us test your knowledge. Read each example and decide the correct codes.
Example A:
A 60-year-old female with a history of primary sclerosing cholangitis (K83.0) underwent a total hepatectomy and liver transplant two years ago. She presents today for routine labs to check her liver function.
Your codes:
- Z94.4 (Liver transplant status)
- Z90.8 (Acquired absence of liver – native organ)
- K83.0 (Primary sclerosing cholangitis – historical, but some coders include it)
Answer: Many coders would use Z94.4 and Z90.8. The K83.0 is resolved after transplant, so it may not be coded as active.
Example B:
A 25-year-old male with acute liver failure due to acetaminophen toxicity (T39.1X1A) is in the operating room. The surgeon just completed a total hepatectomy. The patient will receive a donor liver in six hours.
Your codes:
- T39.1X1A (Poisoning by acetaminophen, accidental, initial encounter)
- Z90.8 (Acquired absence of liver)
Answer: Correct. The poisoning is the reason. The absence is current.
Example C:
A 55-year-old patient with a history of a left lobectomy for a benign liver tumor. The patient asks, “Is my liver missing?” The doctor explains that most of the liver is still present.
Your code: Do NOT use Z90.8. Instead, code D13.4 (Benign neoplasm of liver) in history. No absence code applies.
Additional Resources for Medical Coders
You do not have to memorize everything. Keep these resources handy.
- ICD-10-CM Official Guidelines for Coding and Reporting – Published annually by the CDC and CMS. This is your rulebook.
- AHA Coding Clinic – This is the authoritative source for ICD-10 coding advice. Search for “liver” or “hepatectomy.”
- Your hospital’s transplant coordinator – These nurses and staff know exactly how transplant surgeries are documented. Ask them for help.
- CMS.gov – Search for “Z90.8” to see national coverage determinations.
[Link to additional resource: ICD-10-CM Official Guidelines (CMS)]
Note: Always verify you are looking at the most current year’s guidelines.
The Bottom Line: A Simple Summary
Let us wrap up the most important points.
- The code is Z90.8 – Acquired absence of other organs.
- Use it only for total liver removal – Not partial resections.
- Use it for transplant patients – Both during the procedure and for history of native liver absence.
- Avoid Q44.7 – That is for congenital (born without) absence.
- Add Z94.4 – For patients who currently have a transplanted liver.
Conclusion
The correct ICD-10 code for acquired absence of the liver is Z90.8, which falls under the “other organs” category. Use this code exclusively for patients who have undergone total hepatectomy, most commonly during liver transplant procedures. Always document the reason for the liver absence and add Z94.4 for transplant status to ensure accurate billing and medical records.
Disclaimer: This article is for educational and informational purposes only. Medical coding guidelines change frequently. Always refer to the most current ICD-10-CM Official Guidelines for Coding and Reporting. Consult with a certified medical coder or your compliance department for specific coding advice. The author and publisher assume no responsibility for errors or omissions or for actions taken based on the information contained in this article.
