ICD-9-CM diagnosis code (retired)
427.5 — Cardiac arrest
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 427.5
427.5 is an ICD-9-CM diagnosis code for cardiac arrest. 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, I46.9 (Cardiac arrest, cause unspecified). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- I46.9Cardiac arrest, cause unspecifiedapproximate
Common questions about 427.5
What is the ICD-10 code for ICD-9 427.5?
- The GEMs map 427.5 to ICD-10-CM I46.9.
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. Page updated September 29, 2026.