ICD-9-CM diagnosis code (retired)
253.1 — Other and unspecified anterior pituitary hyperfunction
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 253.1
253.1 is an ICD-9-CM diagnosis code for other and unspecified anterior pituitary hyperfunction. 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 2 ICD-10-CM codes, such as E22.8 (Other hyperfunction of pituitary gland) and E22.9 (Hyperfunction of pituitary gland, unspecified). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 253.1
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.