ICD-9-CM diagnosis code (retired)
266.2 — Other B-complex deficiencies
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 266.2
266.2 is an ICD-9-CM diagnosis code for other B-complex deficiencies. 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, E53.8 (Deficiency of other specified B group vitamins). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- E53.8Deficiency of other specified B group vitaminsapproximate
Common questions about 266.2
What is the ICD-10 code for ICD-9 266.2?
- The GEMs map 266.2 to ICD-10-CM E53.8.
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.