ICD-9-CM diagnosis code (retired)
258.01 — Multiple endocrine neoplasia [MEN] type I
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 258.01
258.01 is an ICD-9-CM diagnosis code for multiple endocrine neoplasia [MEN] type I. 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, E31.21 (Multiple endocrine neoplasia [MEN] type I). The match is exact.
ICD-10-CM equivalents
- E31.21Multiple endocrine neoplasia [MEN] type Iexact match
Common questions about 258.01
What is the ICD-10 code for ICD-9 258.01?
- The GEMs map 258.01 to ICD-10-CM E31.21.
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.