Is E51.8 a billable ICD-10-CM code?

Yes. E51.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E51.8 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Other nutritional deficiencies (E50-E64).

What cannot be coded together with E51.8?

E51.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E51.8 (E51) and apply to it just the same.

E51.8

E51.8 — Other manifestations of thiamine deficiency

Billable / specific codeICD-10-CM

E51.8 is a billable, specific ICD-10-CM code for other manifestations of thiamine deficiency. It is valid for submission on a claim.

Excludes1 inherited from the categories above E51.8

These are not written on E51.8, but they bind it: a note on a category applies to every code beneath it. Billing E51.8 with anything listed here is a denial.

Written on E51 — Thiamine deficiency

sequelae of thiamine deficiency (E64.8)

Risk adjustment

E51.8 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

E51.8 is named in 6 Medicare coverage policies — 6 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54969Billing and Coding: Nerve Conduction Studies and Electromyography
A56619Billing and Coding: Nerve Conduction Studies and Electromyography
A57307Billing and Coding: Nerve Conduction Studies and Electromyography
A57326Billing and Coding: Electrocardiograms

How E51.8 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to E51.8.

Thiamin deficiency›specified NEC

Code history

E51.8 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share E51. If E51.8 is not quite right, the correct code is usually one of these.

Questions about E51.8

Is E51.8 a billable ICD-10-CM code?: Yes. E51.8 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E51.8 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Other nutritional deficiencies (E50-E64).
What cannot be coded together with E51.8?: E51.8 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E51.8 (E51) and apply to it just the same.