Guidelines › Aftercare Z codes

Aftercare Z codes

Official text from the FY2027 ICD-10-CM Official Guidelines for Coding and Reporting. The wording is quoted exactly.

Guidelines I.C.21.c.7

“The aftercare Z code should not be used if treatment is directed at a current, acute disease. The diagnosis code is to be used in these cases.”

“For aftercare of an injury, assign the acute injury code with the appropriate 7th character (for subsequent encounter).”

Where this applies

Z42–Z49Z51.-

112 billable codes. Source: FY 2027 ICD-10-CM Official Guidelines for Coding and Reporting, effective October 1, 2026. Full Guidelines (PDF, CMS)

The Guidelines are the authority for assigning codes, and following them is required under HIPAA. This page quotes them for convenience and is not a substitute for the official document. See the Terms and Disclaimer.