Z79.620 — Long term (current) use of immunosuppressive biologic

Z79.620

ICD-10 Chapter 21: Factors Influencing Health Status — illustrative image — Chapter 21: Factors influencing health status and contact with health services (Z00–Z99) — illustrative image

What this code means

Long-term (current) use of calcineurin inhibitor medicines (such as tacrolimus or ciclosporin), used mainly after transplantation.

Also called: calcineurin inhibitor use, tacrolimus therapy.

When this code is used

Used for long term (current) use of calcineurin inhibitors.

Where it sits in ICD-10-CM

Code Z79.620 belongs to Chapter 21: Factors influencing health status and contact with health services, which covers codes Z00–Z99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Learn more about this condition

Condition guide: Transplantation

Frequently asked questions

What is ICD-10-CM code Z79.620?

Z79.620 is the ICD-10-CM diagnosis code for “Long term (current) use of immunosuppressive biologic”. Long-term (current) use of calcineurin inhibitor medicines (such as tacrolimus or ciclosporin), used mainly after transplantation.

When is code Z79.620 used?

Used for long term (current) use of calcineurin inhibitors. It belongs to Chapter 21 of ICD-10-CM (Factors influencing health status and contact with health services).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.