2026 ICD-10-CM Diagnosis Code M25.311Other instability, right shoulder

ICD-10-CM Codes›M00–M99›M20-M25›M25

ICD-10-CM M25.311
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M25.311 is a billable ICD-10-CM diagnosis code for other instability, right shoulder. 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
M25.311
Billable Status
Yes — Valid for Submission
Code Describes
Other instability, right shoulder
Short Description
Other instability, right shoulder
Same as the full description in the CMS dataset.
Parent Code
M25.31
Other instability, shoulder

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM20-M25Other joint disorders
CategoryM25Other joint disorder, not elsewhere classified
This CodeM25.311Other instability, right shoulder

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral instability of shoulder joints
  • Instability of acromioclavicular joint of bilateral shoulders
  • Instability of acromioclavicular joint of right shoulder
  • Instability of left shoulder joint
  • Instability of right shoulder joint
  • Multidirectional instability of right shoulder joint
  • Multidirectional instability of shoulder joint
  • Shoulder 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

Shoulder Injuries and Disorders

Your shoulder joint is composed of three bones: the clavicle (collarbone), the scapula (shoulder blade), and the humerus (upper arm bone). Your shoulders are the most movable joints in your body. They can also be unstable because the ball of the upper arm is larger than the shoulder socket that holds it.

Read the full article at MedlinePlus

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

Convert M25.311 to ICD-9-CMHistory

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

ICD-9-CM
718.81 Jt derangment NEC-shlder
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 M25.311Overview

Is M25.311 (Other instability, shoulder) a billable code?

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

What MS-DRG does M25.311 group to?

When other instability, right shoulder 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 M25.311?

Under the General Equivalence Mappings, other instability, right shoulder converts to ICD-9-CM 718.81 (jt derangment NEC-shlder). 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.