E46 vs Z59.4
E46 (Unspecified protein-calorie malnutrition) compared with Z59.4 (Lack of adequate food), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. Z59.4 carries an Excludes2 note covering E46: “malnutrition (E40-E46)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| E46Unspecified protein-calorie malnutrition | Z59.4Lack of adequate food | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | Z00-Z99 — Factors Influencing Health Status and Contact with Health Services (Z00-Z99) |
| Definition | Unspecified protein-calorie malnutrition is a billable ICD-10-CM diagnosis code (E46). | Lack of adequate food is a non-billable ICD-10-CM category code (Z59.4). |
| Includes | Malnutrition NOS Protein-calorie imbalance NOS | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources