E53.9 Vitamin B deficiency, unspecified

Billable ICD-10-CM code, FY2026.

Applies from E53 Deficiency of other B group vitamins

Excludes1 (never code together)

• sequelae of vitamin B deficiency (E64.8)

MS-DRG index

Defines the logic of DRG(s) 640-641 in MDC 10.

Approximate ICD-9-CM (GEMs)

• 266.9 Unspecified vitamin B deficiency (approximate)

Code annotations containing back-references to E53.9

Back-references to E53

• Code First: F06.7 Mild neurocognitive disorder due to known physiological condition ("vitamin B deficiency (E53.-)")
• Code First: G32.8 Other specified degenerative disorders of nervous system in diseases classified elsewhere ("cerebral degeneration (due to) vitamin B deficiency, except thiamine (E52-E53.-)")
• Code First: G63 Polyneuropathy in diseases classified elsewhere ("nutritional deficiency (E40-E64)")
• Type 1 Excludes: T45.2X6 Underdosing of vitamins ("vitamin deficiencies (E50-E56)")
• Type 1 Excludes: Z72.4 Inappropriate diet and eating habits ("malnutrition and other nutritional deficiencies (E40-E64)")

Diagnosis Index entries for E53.9

• Avitaminosis (multiple) › B
• Burning › feet syndrome
• Deficiency, deficient › vitamin (multiple) NOS › B (complex) NOS
• Deficiency, deficient › vitamin (multiple) NOS › group B
• Encephalopathy (acute) › vitamin B deficiency NEC
• Polyneuropathy (peripheral) › in (due to) › deficiency (of) › B (-complex) vitamins
• Stomatitis (denture) (ulcerative) › due to › vitamin deficiency › B group NEC
• Syndrome › burning feet

Nearby codes

• E53 Deficiency of other B group vitamins
• E53.0 Riboflavin deficiency
• E53.1 Pyridoxine deficiency
• E53.8 Deficiency of other specified B group vitamins
• E53.9 Vitamin B deficiency, unspecified (this code)