ICD-10-CM 2027
ICD-10 code for Avitaminosis
From the official ICD-10-CM alphabetic index entry “Avitaminosis (multiple)”. Page updated September 29, 2026.
About coding Avitaminosis
The ICD-10-CM code for Avitaminosis is E56.9 (Vitamin deficiency, unspecified). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on E56.9.
Within E56, choose E56.9 (Vitamin deficiency, unspecified) only when documentation doesn't support a more specific option: deficiency of vitamin E (E56.0), deficiency of vitamin K (E56.1) and deficiency of other vitamins (E56.8).
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 Avitaminosis codes (official index)
- B E53.9 — Vitamin B deficiency, unspecified
- with
- beriberi E51.11 — Dry beriberi
- pellagra E52 — Niacin deficiency [pellagra]
- B2 E53.0 — Riboflavin deficiency
- B6 E53.1 — Pyridoxine deficiency
- B12 E53.8 — Deficiency of other specified B group vitamins
- D E55.9 — Vitamin D deficiency, unspecified
- with rickets E55.0 — Rickets, active
- G E53.0 — Riboflavin deficiency
- K E56.1 — Deficiency of vitamin K
- nicotinic acid E52 — Niacin deficiency [pellagra]
Common questions about Avitaminosis ICD-10 codes
What is the ICD-10 code for Avitaminosis?
- E56.9 — Vitamin deficiency, unspecified. More specific codes apply when the documentation supports them: E53.9, E51.11, E52, E53.0 and others below.
What is the ICD-10 code for b avitaminosis?
- E53.9 — Vitamin B deficiency, unspecified.
What is the ICD-10 code for b2 avitaminosis?
- E53.0 — Riboflavin deficiency.
What is the ICD-10 code for b6 avitaminosis?
- E53.1 — Pyridoxine deficiency.
What is the ICD-10 code for b12 avitaminosis?
- E53.8 — Deficiency of other specified B group vitamins.
What is the ICD-10 code for d avitaminosis?
- E55.9 — Vitamin D deficiency, unspecified.
What is the ICD-10 code for g avitaminosis?
- E53.0 — Riboflavin deficiency.
Is E56.9 billable?
- Yes. E56.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can E56.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict E56.9 as a principal diagnosis.
Is E56.9 a CC or MCC?
- No. E56.9 is neither a CC nor an MCC under MS-DRG v44.0.