ICD-9-CM diagnosis code (retired)
281.1 — Other vitamin B12 deficiency anemia
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 281.1
281.1 is an ICD-9-CM diagnosis code for other vitamin B12 deficiency anemia. 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 3 ICD-10-CM codes, such as D51.1 (Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuria), D51.3 (Other dietary vitamin B12 deficiency anemia) and D51.8 (Other vitamin B12 deficiency anemias). All of these are approximate matches, so review the record to pick the right one.
ICD-10-CM equivalents
Common questions about 281.1
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.