E52 — Niacin deficiency [pellagra]
Is E52 billable?
Yes — E52 is billable for FY2027. E52 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. E52 may be submitted for encounters from October 1, 2026 through September 30, 2027.
E52 at a glance
| Code | E52 |
|---|---|
| Description | Niacin deficiency [pellagra] |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does E52 group to?
E52 sits in MDC 10 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 640Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCCmedical
- 641Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCCmedical
How is E52 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to E52. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Niacindeficiency (amide)
- Nicotinic acid deficiency
- Pellagra (alcoholic)
- Alcohol, alcoholic, alcohol-induced › pellagra
- Avitaminosis › nicotinic acid (multiple)
- Cheilosis › with pellagra (angular)
- Deficiency, deficient › niacin
- Deficiency, deficient › nicotinamide
- Deficiency, deficient › nicotinic acid
- Dermatitis › pellagrous (eczematous)
- Encephalopathy › pellagrous (acute)
- Erythema, erythematous › endemic (infectional) (inflammation)
Excludes1 — never code together
The conditions below can never be reported together with E52 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- sequelae of niacin deficiency (E64.8)
Inclusion terms
Alternative wording in documentation that is classified to E52.
- Niacin (-tryptophan) deficiency
- Nicotinamide deficiency
- Pellagra (alcoholic)
Excludes1 — never code together — inherited from Chapter 4
The conditions below can never be reported together with E52 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Excludes2 — not included here — inherited from E50-E64
The conditions below are not part of E52, but a patient may have both at the same time. When documentation supports it, E52 and the excluded code may both be reported.
- nutritional anemias (D50-D53)
How long has E52 existed?
E52 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with E52?
ICD-10-CM declares these codes mutually exclusive with E52 — exactly one of each pair can be correct for a given encounter.