E55.9 Vitamin D deficiency, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

• Avitaminosis D

Applies from E55 Vitamin D deficiency

Excludes1 (never code together)

• adult osteomalacia (M83.-)
• osteoporosis (M80.-)
• sequelae of rickets (E64.3)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 268.9 Unspecified vitamin D deficiency

Code annotations containing back-references to E55.9

Back-references to E55

• Type 1 Excludes: E83 Disorders of mineral metabolism ("vitamin D deficiency (E55.-)")
• 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 E55.9

• Avitaminosis (multiple) › D
• Calciferol (vitamin D) deficiency
• Deficiency, deficient › calciferol
• Deficiency, deficient › ergosterol
• Deficiency, deficient › vitamin (multiple) NOS › D
• Ergosterol deficiency (vitamin D)

Nearby codes

• E55 Vitamin D deficiency
• E55.0 Rickets, active
• E55.9 Vitamin D deficiency, unspecified (this code)