ICD-9-CM diagnosis code (retired)
401.1 — Benign essential hypertension
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 401.1
401.1 is an ICD-9-CM diagnosis code for benign essential hypertension. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, I10 (Essential (primary) hypertension). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- I10Essential (primary) hypertensionapproximate
Common questions about 401.1
What is the ICD-10 code for ICD-9 401.1?
- The GEMs map 401.1 to ICD-10-CM I10.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018.