MCMedicalCodingSoftware
E51

E51: Thiamine deficiency

Non-billable headerICD-10-CM

E51 is a non-billable header ICD-10-CM code for thiamine deficiency. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • sequelae of thiamine deficiency (E64.8)

Other codes that can never be billed with E51

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • G32.8Other specified degenerative disorders of nervous system in diseases classified elsewhere

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead E51

4 child codes. Green means billable.

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.