Code-level instructions

Includes

Malnutrition NOS
Protein-calorie imbalance NOS

Excludes 1

nutritional deficiency NOS (E63.9)

Inherited instructions

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

Excludes 1

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Note

All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

E40-E46 · Malnutrition (E40-E46)

Excludes 1

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

Excludes 2

nutritional anemias (D50-D53)
starvation (T73.0)

Official index references (8)

Calorie deficiency or malnutrition (1)

Calorie deficiency or malnutritionDisease index

Cataract(cortical) (immature) (incipient) (2)

Deficiency, deficient (1)

Deficiency, deficient › proteinDisease index

Malnutrition (4)

MalnutritionDisease index
Malnutrition › proteinDisease index
Malnutrition › protein › calorieDisease index
Malnutrition › protein › energyDisease index

References from other codes (8)

E08 · Diabetes mellitus due to underlying condition

Code first · malnutrition (E40-E46)

E64 · Sequelae of malnutrition and other nutritional deficiencies

Note · This category is to be used to indicate conditions in categories E43, E44, E46, E50-E63 as the cause of sequelae, which are themselves classified elsewhere. The 'sequelae' include conditions specified as such; they also include the late effects of diseases classifiable to the above categories if the disease itself is no longer present

H28 · Cataract in diseases classified elsewhere

Code first · protein-calorie malnutrition (E40-E46)

R60.1 · Generalized edema

Excludes 2 · nutritional edema (E40-E46)

R63.31 · Pediatric feeding disorder, acute

Code also · malnutrition (E40-E46)

R63.32 · Pediatric feeding disorder, chronic

Code also · malnutrition (E40-E46)

R63.6 · Underweight

Excludes 1 · malnutrition (E40-E46)

Z59.4 · Lack of adequate food

Excludes 2 · malnutrition (E40-E46)

MS-DRG · 43.1

640 · Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC
641 · Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC
791 · Prematurity with Major Problems
793 · Full Term Neonate with Major Problems

2026-04-01 – 2026-09-30

Code history

No recorded change since first observation

ChangedUnchanged

FY2016

Effective from 2015-10-01

First observed

Unspecified protein-calorie malnutrition

Billable diagnosis code

CDC/NCHS · FY2016

All editions (19)

All editions	Effective from	Code history
FY2016	2015-10-01	First observed
FY2017	2016-10-01	No tabular change
FY2018	2017-10-01	No tabular change
FY2019	2018-10-01	No tabular change
FY2020	2019-10-01	No tabular change
FY2020 · April	2020-04-01	No tabular change
FY2021	2020-10-01	No tabular change
FY2021 · 01-01	2021-01-01	No tabular change
FY2022	2021-10-01	No tabular change
FY2022 · 04-01	2022-04-01	No tabular change
FY2023	2022-10-01	No tabular change
FY2023 · 04-01	2023-04-01	No tabular change
FY2024	2023-10-01	No tabular change
FY2024 · 04-01	2024-04-01	No tabular change
FY2025	2024-10-01	No tabular change
FY2025 · 04-01	2025-04-01	No tabular change
FY2026	2025-10-01	No tabular change
FY2026 · April	2026-04-01	No tabular change
FY2027	2026-10-01	No tabular change

Historical ICD-9 mappings · 2018

Historical mapping only; not an automatic code substitution.

263.8 · Approximate
263.9 · Approximate