2026 ICD-10-CM Diagnosis Code M75.91Shoulder lesion, unspecified, right shoulder

ICD-10-CM Codes›M00–M99›M70-M79›M75

ICD-10-CM M75.91
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M75.91 is a billable ICD-10-CM diagnosis code for shoulder lesion, unspecified, right shoulder. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 557 through 558. Coders also document this condition as bilateral disorder of tendon of shoulders. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified connective tissue disease.

This medical diagnosis code is frequently used in Orthopedics medical specialties to designate conditions such selected shoulder conditions.

Code Identity

ICD-10-CM Code
M75.91
Billable Status
Yes — Valid for Submission
Code Describes
Shoulder lesion, unspecified, right shoulder
Short Description
Shoulder lesion, unspecified, right shoulder
Same as the full description in the CMS dataset.
Parent Code
M75.9
Shoulder lesion, unspecified

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM75Shoulder lesions
This CodeM75.91Shoulder lesion, unspecified, right shoulder

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Bilateral disorder of tendon of shoulders
  • Tendinitis of left shoulder
  • Tendinitis of right shoulder
  • Tendonitis of bilateral shoulders

Clinical ClassificationClinical

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

CCSR MUS025
Other specified connective tissue disease
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 M75.91 to ICD-9-CMHistory

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

ICD-9-CM
726.2 Shoulder region dis NEC
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 M75.91Overview

Is M75.91 (Shoulder lesion, unspecified) a billable code?

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

What MS-DRG does M75.91 group to?

When shoulder lesion, unspecified, right shoulder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 557, 558, with relative weights from 0.8932 to 1.4869 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M75.91?

Under the General Equivalence Mappings, shoulder lesion, unspecified, right shoulder converts to ICD-9-CM 726.2 (shoulder region dis NEC). 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.