Z48.21 — Encounter for aftercare following heart transplant
Z48.21 is a billable, specific ICD-10-CM code for encounter for aftercare following heart transplant. It is valid for submission on a claim.
Risk adjustment
Z48.21 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 221 Heart Transplant Status/Complications1.053 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
Z48.21 is named in 60 Medicare coverage policies — 60 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52474Immunosuppressive Drugs - Policy Article
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
How Z48.21 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Z48.21.
- Aftercare›following surgery›organ transplant›heart
Related codes at this level
Codes that share Z48.2. If Z48.21 is not quite right, the correct code is usually one of these.
Questions about Z48.21
- Is Z48.21 a billable ICD-10-CM code?
- Yes. Z48.21 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Z48.21 sit in the tabular list?
- Factors influencing health status and contact with health services (Z00-Z99), in the block Encounters for other specific health care (Z40-Z53).