ICD10BillableValid for clinical use
ICD-10 Code E56.1: Deficiency of vitamin K
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
What is this code?
ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).
When is it used?
- May be used when a clinician documents deficiency of vitamin k in a patient's medical record.
- May appear in hospital records, claims, referrals, and clinical documentation.
- This code can be used as a clinically usable diagnosis entry in standardized coding workflows.
What it does not mean
- A code alone does not explain severity, treatment plan, or outcome.
- A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
Code hierarchy
chapter
4Endocrine, nutritional and metabolic diseases (E00-E89)
block
E50-E64Other nutritional deficiencies
category
E56Other vitamin deficiencies
currentE56
Official coding notes
Excludes1 (do not code together)
- deficiency of coagulation factor due to vitamin K deficiency (D68.4)
- vitamin K deficiency of newborn (P53)
Where you may see this code
You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.
Related specialists
EndocrinologistGeneral Physician
Related codes
Sibling codes
Mapped diagnoses and classifications
SNOMED_CT 386073005high
Deficiency of vitamin K1
Source: SNOMED International ICD-10 map
SNOMED_CT 386077006high
Deficiency of vitamin K2
Source: SNOMED International ICD-10 map
SNOMED_CT 870476002high
Inadequate intake of vitamin K and/or vitamin K derivative
Source: SNOMED International ICD-10 map
SNOMED_CT 131117001high
Vitamin K below reference range
Source: SNOMED International ICD-10 map
SNOMED_CT 52675005high
Vitamin K deficiency
Source: SNOMED International ICD-10 map
SNOMED_CT 1286003high
Vitamin K deficiency coagulation disorder
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
E56.1
Common synonyms
Deficiency of vitamin K
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.