E56.1 Deficiency of vitamin K

Billable ICD-10-CM code, FY2026.

Excludes1 (never code together)

• deficiency of coagulation factor due to vitamin K deficiency (D68.4)
• vitamin K deficiency of newborn (P53)

Applies from E56 Other vitamin deficiencies

Excludes1 (never code together)

• sequelae of other vitamin deficiencies (E64.8)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 269.0 Deficiency of vitamin K

Code annotations containing back-references to E56.1

Back-references to E56.1

• Type 1 Excludes: T45.7X6 Underdosing of anticoagulant antagonist, vitamin K and other coagulants ("vitamin K deficiency (E56.1)")

Back-references to E56

• Code First: G63 Polyneuropathy in diseases classified elsewhere ("nutritional deficiency (E40-E64)")
• Code First: G99.8 Other specified disorders of nervous system in diseases classified elsewhere ("avitaminosis (E56.-)")
• 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 E56.1

• Avitaminosis (multiple) › K
• Deficiency, deficient › menadione (vitamin K)
• Deficiency, deficient › vitamin (multiple) NOS › K
• Menadione deficiency

Nearby codes

• E56 Other vitamin deficiencies
• E56.0 Deficiency of vitamin E
• E56.1 Deficiency of vitamin K (this code)
• E56.8 Deficiency of other vitamins
• E56.9 Vitamin deficiency, unspecified