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ICD-10-CM 2027 diagnosis code

E64.0Sequelae of protein-calorie malnutrition

✓ Billable / specificPOA exemptCC — complication/comorbidity

E64.0 is a valid, billable ICD-10-CM code for sequelae of protein-calorie malnutrition. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E64.0

E64.0 is the ICD-10-CM diagnosis code for sequelae of protein-calorie malnutrition. It belongs to category E64 (sequelae of malnutrition and other nutritional deficiencies), block E50-E64 (other nutritional deficiencies) and chapter 4 (endocrine, nutritional and metabolic diseases). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within E64 (sequelae of malnutrition and other nutritional deficiencies), E64.0 is specifically for sequelae of protein-calorie malnutrition. Related codes cover vitamin A deficiency (E64.1), vitamin C deficiency (E64.2), rickets (E64.3), other nutritional deficiencies (E64.8) and unspecified nutritional deficiency (E64.9).

The conditions in its Excludes2 note aren't part of E64.0, but may be coded alongside it if the patient has both: retarded development following protein-calorie malnutrition (E45).

Code first: condition resulting from (sequela) of malnutrition and other nutritional deficiencies.

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC, relative weight 1.3395), DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC, relative weight 0.7865), DRG 791 (Prematurity with Major Problems, relative weight 4.1075) and DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), in MDC 10 (Endocrine, Nutritional and Metabolic Diseases and Disorders) and MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 263.9 (unspecified protein-calorie malnutrition).

Coding notes

Excludes2Not included here — may be reported together if both conditions exist
  • retarded development following protein-calorie malnutrition (E45)

Notes that apply from higher levels

Instructions written at a parent level also apply to E64.0.

› From 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
Code first
  • condition resulting from (sequela) of malnutrition and other nutritional deficiencies

Broader instructions also apply from E50-E64 Other nutritional deficiencies and Chapter 4: Endocrine, nutritional and metabolic diseases.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to E64.0.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

MDC 15 · Newborns and Other Neonates with Conditions Originating in the Perinatal Period

ICD-9-CM equivalent

Converter →
  • 263.9Unspecified protein-calorie malnutritionapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about E64.0

Is E64.0 billable?

Yes. E64.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can E64.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict E64.0 as a principal diagnosis.

Is E64.0 a CC or MCC?

E64.0 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does E64.0 group to?

E64.0 is used in the MS-DRG v44.0 logic for MS-DRG 640 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes with MCC), MS-DRG 641 (Miscellaneous Disorders of Nutrition, Metabolism, Fluids and Electrolytes without MCC), MS-DRG 791 (Prematurity with Major Problems) and MS-DRG 793 (Full Term Neonate with Major Problems). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for E64.0?

The CMS General Equivalence Mappings map E64.0 to ICD-9-CM 263.9.