October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

D51 Vitamin B12 deficiency anemia

All 6 codes in the D51 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.

ICD-10-CM FY2027 · CMS grouper v07.2.26

Codes in family

6

Can lead a claim

6

Cannot lead a claim

0

What CMS assigns to D51

All 6 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. All 6 count toward the Nutritional, Enzymatic, and Other Heredity Anemias comorbidity subgroup. Every code can lead a claim.

  • Nutritional, Enzymatic, and Other Heredity Anemias: counts toward the high comorbidity tier only in an interaction pair.

Every code in D51

Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
D51.0Vitamin B12 deficiency anemia due to intrinsic factor deficiencyCMS: Vitamin B12 defic anemia due to intrinsic factor deficiencyCan lead a claimKNutritional, Enzymatic, and Other Heredity Anemias
D51.1Vitamin B12 deficiency anemia due to selective vitamin B12 malabsorption with proteinuriaCMS: Vit B12 defic anemia d/t slctv vit B12 malabsorp w proteinCan lead a claimKNutritional, Enzymatic, and Other Heredity Anemias
D51.2Transcobalamin II deficiencyCan lead a claimKNutritional, Enzymatic, and Other Heredity Anemias
D51.3Other dietary vitamin B12 deficiency anemiaCan lead a claimKNutritional, Enzymatic, and Other Heredity Anemias
D51.8Other vitamin B12 deficiency anemiasCan lead a claimKNutritional, Enzymatic, and Other Heredity Anemias
D51.9Vitamin B12 deficiency anemia, unspecifiedCan lead a claimKNutritional, Enzymatic, and Other Heredity Anemias

Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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