Encounter for other aftercare and medical care (Z51) ICD-10-CM
The Z51 code range covers encounter for other aftercare and medical care with 11 ICD-10-CM diagnosis codes. 8 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Code Also
A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
- condition requiring care
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Codes in the Z51 Range 11 codes · 8 billable
- Z51 Encounter for other aftercare and medical careNon-billable
- Z51.0 Encounter for antineoplastic radiation therapy
- Z51.1 Encounter for antineoplastic chemotherapy and immunotherapyNon-billable
- Z51.11 Encounter for antineoplastic chemotherapy
- Z51.12 Encounter for antineoplastic immunotherapy
- Z51.5 Encounter for palliative care
- Z51.6 Encounter for desensitization to allergens
- Z51.8 Encounter for other specified aftercareNon-billable
- Z51.81 Encounter for therapeutic drug level monitoring
- Z51.89 Encounter for other specified aftercare
- Z51.A Encounter for sepsis aftercare
About the Z51 Code Range
These encounters involve aftercare or specific medical care, including cancer treatment, palliative care, and desensitization to allergens.
Z51.0 identifies radiation therapy for cancer. Z51.1 divides into chemotherapy and immunotherapy. Separate codes identify palliative care and desensitization to allergens.
Other specified aftercare separates therapeutic drug level monitoring from other specified aftercare. Z51.A identifies sepsis aftercare.
Questions About This Page
How many billable codes are in the Z51 range?
Of the 11 codes in this range, 8 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the Z51 range classify?
The range classifies encounter for other aftercare and medical care. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
