ICD-10-CM 2027
ICD-10 code for Pellagrous gingivitis
From the official ICD-10-CM alphabetic index entry “Gingivitis › pellagrous”. Page updated September 29, 2026.
About coding Pellagrous gingivitis
The ICD-10-CM code for Pellagrous gingivitis is E52 (Niacin deficiency [pellagra]). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on E52.
Don't report E52 together with the conditions in its Excludes1 note: sequelae of niacin deficiency (E64.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC, relative weight 1.3395) and DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC, relative weight 0.7865), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific Pellagrous gingivitis codes (official index)
- acute necrotizing A69.1 — Other Vincent's infections
Don't confuse with (Excludes1 for E52)
- sequelae of niacin deficiency (E64.8)
Common questions about Pellagrous gingivitis ICD-10 codes
What is the ICD-10 code for Pellagrous gingivitis?
- E52 — Niacin deficiency [pellagra]. More specific codes apply when the documentation supports them: A69.1.
What is the ICD-10 code for acute necrotizing pellagrous gingivitis?
- A69.1 — Other Vincent's infections.
Is E52 billable?
- Yes. E52 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E52 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E52 as a principal diagnosis.
Is E52 a CC or MCC?
- No. E52 is neither a CC nor an MCC under MS-DRG v44.0.