Organ Transplant Status HCC Coding Guide
Complete HCC coding guide for Organ Transplant Status (Z94.x) including ICD-10 to HCC mapping, V28 RAF weights, immunosuppression documentation, and transplant complication coding.
Quick Facts
HCC Categories
HCC 186 — Major Organ Transplant Status
RAF Weight Range
0.658
Community, non-dual, aged (V28)
Model
CMS-HCC V28 (PY2026 — 100% phase-in)
10 ICD-10 codes map to payment HCCs
Overview
Organ transplant status is a significant HCC condition reflecting the ongoing medical complexity and immunosuppressive therapy required for transplant recipients. Under CMS-HCC V28, major organ transplant status maps to HCC 186 (Major Organ Transplant Status). Approximately 250,000 Americans are living with a functioning organ transplant. Coding requires reporting the Z94.x status code at every encounter, specifying the transplanted organ, and documenting current immunosuppressive therapy. The transplant status code must be paired with any transplant complications (T86.x) when present. Coders should also capture the underlying condition that led to the transplant when it remains active and clinically relevant.
ICD-10 to HCC Mapping
| ICD-10 Code | Description | Billable | HCC Mapping |
|---|---|---|---|
| Z94.0 | Kidney transplant status | Yes | HCC 186 |
| Z94.1 | Heart transplant status | Yes | HCC 186 |
| Z94.2 | Lung transplant status | Yes | HCC 186 |
| Z94.3 | Heart and lungs transplant status | Yes | HCC 186 |
| Z94.4 | Liver transplant status | Yes | HCC 186 |
| Z94.83 | Pancreas transplant status | Yes | HCC 186 |
| T86.10 | Unspecified complication of kidney transplant | Yes | HCC 186 |
| T86.11 | Kidney transplant rejection | Yes | HCC 186 |
| T86.21 | Heart transplant rejection | Yes | HCC 186 |
| T86.41 | Liver transplant rejection | Yes | HCC 186 |
RAF weights are community, non-dual, aged base coefficients from the CMS-HCC V28 model (PY2026). Verify against the latest CMS rate announcement for payment calculations.
Documentation Tips
Report the transplant status code (Z94.x) at every encounter — it must be recaptured annually for risk adjustment.
Document the specific organ transplanted: kidney, heart, lung, liver, pancreas, or combination.
Record current immunosuppressive medications (tacrolimus, mycophenolate, prednisone) to satisfy MEAT treatment criteria.
Code transplant complications (T86.x) separately when documented: rejection, failure, infection.
Document lab monitoring: tacrolimus levels, renal function for kidney transplant, liver function for liver transplant.
Note the date of transplant and the transplant center for continuity of care documentation.
If CKD persists after kidney transplant, code both Z94.0 and the appropriate CKD stage.
Common Coding Mistakes
Failing to code transplant status at every encounter — Z94.x must be reported annually for risk adjustment capture.
Not coding transplant complications (T86.x) separately when rejection, failure, or infection is documented.
Missing the immunosuppressive drug therapy code (Z79.899) as a supporting code for long-term medication documentation.
Forgetting to code the original disease (CKD, heart failure, cirrhosis) if it remains relevant after transplant.
V24 to V28 Changes
V28 maintains major organ transplant status as HCC 186, similar in concept to V24's HCC 186. The RAF weight was recalibrated under V28 to reflect current transplant management costs, including modern immunosuppressive regimens. V28 maintained the recognition that transplant recipients require ongoing specialized care and immunosuppression monitoring, justifying the significant RAF weight. The coding requirements remain consistent — the key message is that transplant status must be documented and coded at every encounter.
Related Conditions
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