What is the ICD-10 code for Unspecified protein-calorie malnutrition?

The ICD-10-CM code for Unspecified protein-calorie malnutrition is E46 (fiscal year 2026). It is a billable diagnosis code.

What does ICD-10 code E46 mean?

E46 is the ICD-10-CM diagnosis code for Unspecified protein-calorie malnutrition. Unspecified protein-calorie malnutrition

Is E46 a billable ICD-10 code?

Yes, E46 is a billable ICD-10-CM code that can be used on medical claims.

What chapter is E46 in?

E46 is classified under Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E89), Section E40-E46: Malnutrition (E40-E46).

What are the includes and excludes for E46?

Excludes1 (not coded here): nutritional deficiency NOS (E63.9).

E46 Unspecified protein-calorie malnutrition

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The ICD-10-CM code for Unspecified protein-calorie malnutrition is E46 (FY2026). It is a billable, claim-ready diagnosis code.

Choosing between codes? See the guide: ICD-10 code for malnutrition.

Classification

Chapter: 4: Endocrine, nutritional and metabolic diseases (E00-E89)
Section: E40-E46: Malnutrition (E40-E46)
Category E46: 1 code (1 billable)
FY2026 Status: Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to E46:

Malnutrition
Calorie deficiency or malnutrition
Malnutrition › protein
Cataract (cortical) (immature) (incipient) › malnutrition-dehydration
Deficiency, deficient › protein
Malnutrition › protein › calorie
Malnutrition › protein › energy
Cataract (cortical) (immature) (incipient) › in (due to) › malnutrition-dehydration

Excludes1

Not coded here. These conditions should NOT be coded together with E46.

nutritional deficiency NOS (E63.9)

Inclusion Terms

Malnutrition NOS
Protein-calorie imbalance NOS

U.S. Hospital Utilization

An estimated 324,260 U.S. inpatient stays in 2023 included E46 among the documented diagnoses.
1,570 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Diabetes mellitus (TOC entry)

a. Diabetes mellitus ................................................................................................................... 39

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.4.a

Obesity (TOC entry)

b. Obesity .................................................................................................................................. 42

— ICD-10-CM Official Guidelines for Coding and Reporting, FY2026, Section I.C.4.b

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

Cite This Page

Reference E46 with the canonical source and edition:

E46 — Unspecified protein-calorie malnutrition. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/E46

Canonical URL: https://icd10codingpro.com/codes/E46