Guidelines › Resistant hypertension

Resistant hypertension

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

Guidelines I.C.9.a.12

“Assign code I1A.0, Resistant hypertension, as an additional code when apparent treatment resistant hypertension, treatment resistant hypertension, or true resistant hypertension is documented by the provider.”

“A code for the specific type of existing hypertension is sequenced first, if known.”

Where this applies

1 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.