2026 ICD-10-CM Diagnosis Code M25.9Joint disorder, unspecified

ICD-10-CM Codes›M00–M99›M20-M25›M25

ICD-10-CM M25.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M25.9 is a billable ICD-10-CM diagnosis code for joint disorder, unspecified. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 555 through 556. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified joint disorders.

Code Identity

ICD-10-CM Code
M25.9
Billable Status
Yes — Valid for Submission
Code Describes
Joint disorder, unspecified
Short Description
Joint disorder, unspecified
Same as the full description in the CMS dataset.
Parent Code
M25
Other joint disorder, not elsewhere classified

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM25Other joint disorder, not elsewhere classified
This CodeM25.9Joint disorder, unspecified

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bone AND/OR joint disorder in mother complicating pregnancy, childbirth AND/OR puerperium
  • Bone AND/OR joint disorder of back in mother complicating pregnancy, childbirth AND/OR puerperium
  • Bone AND/OR joint disorder of lower extremities in mother complicating pregnancy, childbirth AND/OR puerperium
  • Bone AND/OR joint disorder of pelvis in mother complicating pregnancy, childbirth AND/OR puerperium
  • Cardiomyopathy with cataract and hip spine disease syndrome
  • Chronic musculoskeletal pain due to disorder
  • Chronic musculoskeletal pain due to disorder of joint
  • Disorder of acromioclavicular joint
  • Disorder of ankle
  • Disorder of ankle joint
  • Disorder of elbow
  • Disorder of glenohumeral joint
  • Disorder of hip joint
  • Disorder of joint of ankle and/or foot
  • Disorder of joint of foot
  • Disorder of joint of shoulder region
  • Disorder of joint region
  • Disorder of knee
  • Disorder of left sacroiliac joint
  • Disorder of right sacroiliac joint
  • Disorder of wrist joint
  • Dysfunction of cervicothoracic region
  • Joint function disorder
  • Lesion of joint
  • Monoarticular joint involvement
  • Nonsenile cataract
  • Oligoarticular joint involvement
  • Polyarticular joint involvement
  • Rheumatology disorder - joints affected
  • Rheumatology disorder monitoring status
  • Sacroiliac disorder

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.

    • Disease, diseased
      • hip (joint)
    • Disorder(of)
      • joint

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

Joint Disorders

Your joints are places where two or more bones come together. Your shoulders, elbows, hips, knees, and knuckles are all joints. Your spine has joints, too.

The full article covers:

  • What are joints?
  • What are joint disorders?
  • What diseases can affect the joints?
  • What types of joint disorders happen from sudden injuries?
  • What types of joint disorders happen from overuse?
  • How can I keep my joints healthy?

Read the full article at MedlinePlus

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

Convert M25.9 to ICD-9-CMHistory

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

ICD-9-CM
719.90 Joint dis NOS-unspec jt
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 M25.9Overview

Is M25.9 (Other joint disorder, not elsewhere classified) a billable code?

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

What MS-DRG does M25.9 group to?

When joint disorder, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 555, 556, with relative weights from 0.8306 to 1.3218 depending on complications. Higher weights mean higher Medicare reimbursement.

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

Under the General Equivalence Mappings, joint disorder, unspecified converts to ICD-9-CM 719.90 (joint dis NOS-unspec jt). 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.