2026 ICD-10-CM Diagnosis Code E83.81Hungry bone syndrome

ICD-10-CM Codes›E00–E89›E70-E88›E83

ICD-10-CM E83.81
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E83.81 is a billable ICD-10-CM diagnosis code for hungry bone syndrome. 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 Other specified and unspecified nutritional and metabolic disorders.

Code Identity

ICD-10-CM Code
E83.81
Billable Status
Yes — Valid for Submission
Code Describes
Hungry bone syndrome
Short Description
Hungry bone syndrome
Same as the full description in the CMS dataset.
Parent Code
E83.8
Other disorders of mineral metabolism

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE70-E88Metabolic disorders
CategoryE83Disorders of mineral metabolism
This CodeE83.81Hungry bone syndrome

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Hungry bone syndrome

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.

    • Hungry bone syndrome
    • Syndrome
      • hungry bone

Clinical ClassificationClinical

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

CCSR END016
Other specified and unspecified nutritional and metabolic disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Metabolic Disorders

Metabolism is the process your body uses to get or make energy from the food you eat. Food is made up of proteins, carbohydrates, and fats. Chemicals in your digestive system break the food parts down into sugars and acids, your body's fuel.

Read the full article at MedlinePlus

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

Convert E83.81 to ICD-9-CMHistory

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

ICD-9-CM
275.5 Hungry bone syndrome
Exact Match The mapping is direct, with no qualifiers.

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 E83.81Overview

Is E83.81 (Other disorders of mineral metabolism) a billable code?

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

What MS-DRG does E83.81 group to?

When hungry bone syndrome 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 E83.81?

Under the General Equivalence Mappings, hungry bone syndrome converts to ICD-9-CM 275.5 (hungry bone syndrome). The mapping is a direct match.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.