2026 ICD-10-CM Diagnosis Code M25.349Other instability, unspecified hand

ICD-10-CM Codes›M00–M99›M20-M25›M25

ICD-10-CM M25.349
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M25.349 is a billable ICD-10-CM diagnosis code for other instability, unspecified hand. 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
M25.349
Billable Status
Yes — Valid for Submission
Code Describes
Other instability, unspecified hand
Short Description
Other instability, unspecified hand
Same as the full description in the CMS dataset.
Parent Code
M25.34
Other instability, hand

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM25Other joint disorder, not elsewhere classified
This CodeM25.349Other instability, unspecified hand

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Active range of finger abduction - finding
  • Active range of finger adduction - finding
  • Active range of finger extension - finding
  • Active range of finger flexion - finding
  • Active range of thumb abduction - finding
  • Active range of thumb adduction - finding
  • Active range of thumb extension - finding
  • Active range of thumb flexion - finding
  • Active range of thumb opposition - finding
  • Chronic instability of joint
  • Chronic instability of the metacarpophalangeal joint of thumb
  • Finger joint hypermobility
  • Finger joint laxity
  • Finger joint unstable
  • Hand joint hypermobility
  • Hand joint laxity
  • Increased active range of finger abduction
  • Increased active range of finger adduction
  • Increased active range of finger extension
  • Increased active range of finger flexion
  • Increased active range of thumb abduction
  • Increased active range of thumb adduction
  • Increased active range of thumb extension
  • Increased active range of thumb flexion
  • Increased active range of thumb opposition
  • Increased passive range of finger abduction
  • Increased passive range of finger adduction
  • Increased passive range of finger extension
  • Increased passive range of finger flexion
  • Increased passive range of thumb abduction
  • Increased passive range of thumb adduction
  • Increased passive range of thumb extension
  • Increased passive range of thumb flexion
  • Increased passive range of thumb opposition
  • Increased range of finger movement
  • Increased range of thumb movement
  • Instability of hand joint
  • Metacarpophalangeal joint hypermobility
  • Metacarpophalangeal joint laxity
  • Passive range of finger abduction - finding
  • Passive range of finger adduction - finding
  • Passive range of finger extension - finding
  • Passive range of finger flexion - finding
  • Passive range of thumb abduction - finding
  • Passive range of thumb adduction - finding
  • Passive range of thumb extension - finding
  • Passive range of thumb flexion - finding
  • Passive range of thumb opposition - finding
  • Range of finger abduction - finding
  • Range of finger adduction - finding
  • Range of finger flexion - finding
  • Range of thumb abduction - finding
  • Range of thumb adduction - finding
  • Range of thumb extension - finding
  • Range of thumb flexion - finding
  • Range of thumb opposition - finding
  • Thumb joint hypermobility
  • Thumb joint laxity
  • Thumb 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

Hand Injuries and Disorders

No matter how old you are or what you do for a living, you are always using your hands. When there is something wrong with them, you may not be able to do your regular activities.

Read the full article at MedlinePlus

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

Convert M25.349 to ICD-9-CMHistory

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

ICD-9-CM
718.84 Jt derangement NEC-hand
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 M25.349Overview

Is M25.349 (Other instability, hand) a billable code?

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

What MS-DRG does M25.349 group to?

When other instability, unspecified hand 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 M25.349?

Under the General Equivalence Mappings, other instability, unspecified hand converts to ICD-9-CM 718.84 (jt derangement NEC-hand). 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.