2026 ICD-10-CM Diagnosis Code E64.0Sequelae of protein-calorie malnutrition

ICD-10-CM Codes›E00–E89›E50-E64›E64

ICD-10-CM E64.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E64.0 is a billable ICD-10-CM diagnosis code for sequelae of protein-calorie malnutrition. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 640 through 641. The code is exempt from POA reporting. Coders also document this condition as cachectic alopecia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Sequela of malnutrition and other nutritional deficiencies.

Code Identity

ICD-10-CM Code
E64.0
Billable Status
Yes — Valid for Submission
Code Describes
Sequelae of protein-calorie malnutrition
Short Description
Sequelae of protein-calorie malnutrition
Same as the full description in the CMS dataset.
Parent Code
E64
Sequelae of malnutrition and other nutritional deficiencies

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE50-E64Other nutritional deficiencies
CategoryE64Sequelae of malnutrition and other nutritional deficiencies
This CodeE64.0Sequelae of protein-calorie malnutrition

Present on Admission (POA)Billing

E64.0 is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Cachectic alopecia
  • Sequelae of nutritional disorders
  • Sequelae of protein-energy malnutrition

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 2 Excludes

  • retarded development following protein-calorie malnutrition E45

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Sequelae(of)
      • protein-energy malnutrition

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR END017
Sequela of malnutrition and other nutritional deficiencies
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Malnutrition

Malnutrition means that your body isn't getting enough calories or the right balance of nutrients to stay healthy. This can happen if you don't get enough protein, carbohydrates, and fats, eat too much unhealthy food, or don't get the vitamins and minerals your body needs.

The full article covers:

  • What is malnutrition?
  • What are the types of malnutrition?
  • What causes malnutrition?
  • Who is at risk for developing malnutrition?
  • What are the symptoms of malnutrition?
  • How is malnutrition diagnosed?
  • What are the treatments for malnutrition?
  • Can malnutrition be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert E64.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
263.9 Protein-cal malnutr NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E64.0Overview

Is E64.0 (Sequelae of malnutrition and other nutritional deficiencies) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report sequelae of protein-calorie malnutrition on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does E64.0 group to?

When sequelae of protein-calorie malnutrition is the principal diagnosis on an inpatient stay, it groups to MS-DRG 640, 641, with relative weights from 0.7782 to 1.3356 depending on complications. Higher weights mean higher Medicare reimbursement.

Is E64.0 exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for sequelae of protein-calorie malnutrition on inpatient claims.

What is the ICD-9 equivalent of E64.0?

Under the General Equivalence Mappings, sequelae of protein-calorie malnutrition converts to ICD-9-CM 263.9 (protein-cal malnutr NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.