ICD-9-CM diagnosis code (retired)
704.42 — Trichilemmal cyst
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 704.42
704.42 is an ICD-9-CM diagnosis code for Trichilemmal cyst. 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, L72.12 (Trichodermal cyst). The match is exact.
ICD-10-CM equivalents
- L72.12Trichodermal cystexact match
Common questions about 704.42
What is the ICD-10 code for ICD-9 704.42?
- The GEMs map 704.42 to ICD-10-CM L72.12.
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.