Z09 vs Z49
Z09 (Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm) compared with Z49 (Encounter for care involving renal dialysis), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. Z09 carries an Excludes1 note covering Z49: “aftercare following medical care (Z43-Z49, Z51)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Yes, when both are documented. Z49 carries an Excludes2 note covering Z09: “follow-up examination for medical surveillance after treatment (Z08-Z09)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| Z09Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm | Z49Encounter for care involving renal dialysis | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Encounter for follow-up examination after completed treatment for conditions other than malignant neoplasm is a billable ICD-10-CM diagnosis code (Z09). | Encounter for care involving renal dialysis is a non-billable ICD-10-CM category code (Z49). |
| Includes | Medical surveillance following completed treatment | — |
| Use additional code | code to identify any applicable history of disease code (Z86.-, Z87.-) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources