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ICD-10-CM tabular list

E40-E46Malnutrition

ICD-10-CM codes E40-E46 cover malnutrition, within endocrine, nutritional and metabolic diseases. The block holds 9 codes across 7 categories, of which 8 are billable and 1 are header codes that cannot be submitted on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • intestinal malabsorption (K90.-)
  • sequelae of protein-calorie malnutrition (E64.0)

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

What else to watch in E40-E46

  • 8 codes are named in Medicare coverage policies. An LCD or NCD lists them as supporting medical necessity, or explicitly as not supporting it. Which applies depends on the MAC for your state.

Categories in E40-E46

ICD-10-CMFY2026-Apr· effective April 1, 2026