2026 ICD-10-CM Diagnosis Code M25.376Other instability, unspecified foot

ICD-10-CM Codes›M00–M99›M20-M25›M25

ICD-10-CM M25.376
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M25.376 is a billable ICD-10-CM diagnosis code for other instability, unspecified foot. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 564 through 566. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.

Code Identity

ICD-10-CM Code
M25.376
Billable Status
Yes — Valid for Submission
Code Describes
Other instability, unspecified foot
Short Description
Other instability, unspecified foot
Same as the full description in the CMS dataset.
Parent Code
M25.37
Other instability, ankle and foot

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM25Other joint disorder, not elsewhere classified
This CodeM25.376Other instability, unspecified foot

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Active range of midtarsal pronation - finding
  • Active range of midtarsal supination - finding
  • Active range of subtalar joint eversion - finding
  • Active range of subtalar joint inversion - finding
  • Active range of toe abduction - finding
  • Active range of toe adduction - finding
  • Active range of toe extension - finding
  • Active range of toe flexion - finding
  • Foot joint hypermobility
  • Foot joint laxity
  • Hypermobility of subtalar joint
  • Increased active range of midtarsal pronation
  • Increased active range of midtarsal supination
  • Increased active range of toe abduction
  • Increased active range of toe adduction
  • Increased active range of toe extension
  • Increased active range of toe flexion
  • Increased passive range of midtarsal pronation
  • Increased passive range of midtarsal supination
  • Increased passive range of toe abduction
  • Increased passive range of toe adduction
  • Increased passive range of toe extension
  • Increased passive range of toe flexion
  • Increased range of active eversion of subtalar joint
  • Increased range of active inversion of subtalar joint
  • Increased range of foot movement
  • Increased range of passive eversion of subtalar joint
  • Increased range of passive inversion of subtalar joint
  • Increased range of subtalar movement
  • Increased range of toe movement
  • Instability of foot joint
  • Interphalangeal joint of toe hypermobility
  • Interphalangeal joint of toe laxity
  • Metatarsophalangeal joint laxity
  • Midtarsal joint unstable
  • Passive range of midtarsal pronation - finding
  • Passive range of midtarsal supination - finding
  • Passive range of subtalar joint eversion - finding
  • Passive range of subtalar joint inversion - finding
  • Passive range of toe abduction - finding
  • Passive range of toe adduction - finding
  • Passive range of toe extension - finding
  • Passive range of toe flexion - finding
  • Range eversion of subtalar joint - finding
  • Range of inversion of subtalar joint - finding
  • Range of midtarsal pronation - finding
  • Range of midtarsal supination - finding
  • Range of toe abduction - finding
  • Range of toe adduction - finding
  • Subtalar joint laxity
  • Subtalar joint unstable
  • Toe joint unstable

Clinical ClassificationClinical

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

CCSR MUS007
Other specified joint disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Foot Injuries and Disorders

Each of your feet has 26 bones, 33 joints, and more than 100 tendons, muscles, and ligaments. No wonder a lot of things can go wrong. Here are a few common problems:

Read the full article at MedlinePlus

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

Convert M25.376 to ICD-9-CMHistory

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

ICD-9-CM
718.87 Jt derangement NEC-ankle
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 M25.376Overview

Is M25.376 (Other instability, ankle and foot) a billable code?

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

What MS-DRG does M25.376 group to?

When other instability, unspecified foot is the principal diagnosis on an inpatient stay, it groups to MS-DRG 564, 565, 566, with relative weights from 0.7493 to 1.5436 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M25.376?

Under the General Equivalence Mappings, other instability, unspecified foot converts to ICD-9-CM 718.87 (jt derangement NEC-ankle). 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.