E43 Unspecified severe protein-calorie malnutrition

The ICD-10-CM code for Unspecified severe protein-calorie malnutrition is E43 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

4: Endocrine, nutritional and metabolic diseases (E00-E89)

Section

E40-E46: Malnutrition (E40-E46)

Category E43

1 code (1 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to E43:

• Anasarca › nutritional
• Atrophy, atrophic (of) › nutritional
• Deficiency, deficient › calorie, severe
• Malnutrition › severe (protein-energy)
• Emaciation › due to malnutrition
• Wasting › extreme (due to malnutrition)
• Malnutrition › degree › third
• Malnutrition › degree › severe (protein-energy)

Inclusion Terms

• Starvation edema

U.S. Hospital Utilization

• An estimated 1,168,115 U.S. inpatient stays in 2023 included E43 among the documented diagnoses.
• 16,265 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

Obesity (TOC entry)

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

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

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)