2026 ICD-10-CM Diagnosis Code E63.9Nutritional deficiency, unspecified

ICD-10-CM Codes›E00–E89›E50-E64›E63

ICD-10-CM E63.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E63.9 is a billable ICD-10-CM diagnosis code for nutritional deficiency, unspecified. 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Nutritional deficiencies.

Code Identity

ICD-10-CM Code
E63.9
Billable Status
Yes — Valid for Submission
Code Describes
Nutritional deficiency, unspecified
Short Description
Nutritional deficiency, unspecified
Same as the full description in the CMS dataset.
Parent Code
E63
Other nutritional deficiencies

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE50-E64Other nutritional deficiencies
CategoryE63Other nutritional deficiencies
This CodeE63.9Nutritional deficiency, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute deficiency state
  • Alteration in nutrition
  • Alteration in nutrition: less than body requirements
  • Angular cheilitis
  • Angular cheilitis due to nutritional deficiency
  • Below expected nutrient requirement
  • Cardiac glycogenosis
  • Chronic deficiency state
  • Dementia due to nutritional deficiency
  • Dietetic gastritis
  • Dilated cardiomyopathy due to nutritional deficiency
  • Encephalopathy due to nutritional deficiency
  • Enteral nutrition infusion finding
  • Fetal disorder due to maternal nutritional disorder
  • Glaucoma in endocrine, nutritional and metabolic diseases
  • Hypermelanosis due to nutritional disorder
  • Impaired nutrient utilization
  • Inadequate enteral nutrition infusion
  • Inadequate food diet
  • Inadequate oral intake
  • Inadequate parenteral nutrition infusion
  • Infiltrative cardiomyopathy
  • Intellectual disability due to nutritional deficiency
  • Metabolic and nutritional disorders affecting skin
  • Myelopathy due to nutritional deficiency
  • Neglect of adult
  • Neurological disorder due to nutrient deficiency
  • Neuropathy due to nutritional deficiency
  • Nutrition deficiency due to a particular kind of food
  • Nutrition impaired
  • Nutrition impaired due to imbalance of nutrients
  • Nutrition impaired due to limited access to healthful foods
  • Nutritional autonomic neuropathy
  • Nutritional deficiency disorder
  • Nutritional deficiency in pregnancy
  • Nutritional deficiency state
  • Nutritional deficiency with AIDS
  • Nutritional desexing syndrome
  • Nutritional disorder
  • Nutritional neglect of adult
  • Parenteral nutrition infusion finding
  • Radiculopathy due to nutritional deficiency
  • Undernourished
  • White matter disorder due to nutritional deficiency

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.

    • Arthropathy
      • in (due to)
        • nutritional deficiency
    • Cardiomyopathy(familial) (idiopathic)
      • nutritional
    • Cataract(cortical) (immature) (incipient)
      • in (due to)
        • nutritional disease
    • Deficiency, deficient
      • diet
    • Deficiency, deficient
      • nutrition, nutritional
    • Dietary
      • inadequacy or deficiency
    • Disease, diseased
      • nutritional
    • Disturbance(s)
      • nutritional
    • Gastritis(simple)
      • due to diet deficiency
    • Inadequate, inadequacy
      • diet (causing nutritional deficiency)
    • Insufficiency, insufficient
      • dietary
    • Nutrition deficient or insufficient
    • Polyneuritis, polyneuritic
      • nutritional
    • Polyneuropathy(peripheral)
      • in (due to)
        • nutritional deficiency NEC
    • Polyneuropathy(peripheral)
      • nutritional NEC

Clinical ClassificationClinical

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

CCSR END007
Nutritional deficiencies
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Nutritional Deficiency

    a deficiency of a necessary nutrient.

  • Nutritional Disorder

    any condition related to a disturbance between proper intake and utilization of nourishment.

  • Myocardial Degeneration

    degeneration of myocardial tissue.

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 E63.9 to ICD-9-CMHistory

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

ICD-9-CM
269.9 Nutrition deficiency 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 E63.9Overview

Is E63.9 (Other nutritional deficiencies) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report nutritional deficiency, unspecified on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does E63.9 group to?

When nutritional deficiency, unspecified 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.

What is the ICD-9 equivalent of E63.9?

Under the General Equivalence Mappings, nutritional deficiency, unspecified converts to ICD-9-CM 269.9 (nutrition deficiency 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.