ICD-9-CM diagnosis code (retired)
550.00 — Inguinal hernia, with gangrene, unilateral or unspecified (not specified as recurrent)
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 550.00
550.00 is an ICD-9-CM diagnosis code for inguinal hernia, with gangrene, unilateral or unspecified (not specified as recurrent). 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, K40.40 (Unilateral inguinal hernia, with gangrene, not specified as recurrent). The match is exact.
ICD-10-CM equivalents
- K40.40Unilateral inguinal hernia, with gangrene, not specified as recurrentexact match
Common questions about 550.00
What is the ICD-10 code for ICD-9 550.00?
- The GEMs map 550.00 to ICD-10-CM K40.40.
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.