2026 ICD-10-CM Diagnosis Code M75.21Bicipital tendinitis, right shoulder

ICD-10-CM Codes›M00–M99›M70-M79›M75

ICD-10-CM M75.21
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M75.21 is a billable ICD-10-CM diagnosis code for bicipital tendinitis, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Tendon and synovial disorders.

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

Code Identity

ICD-10-CM Code
M75.21
Billable Status
Yes — Valid for Submission
Code Describes
Bicipital tendinitis, right shoulder
Short Description
Bicipital tendinitis, right shoulder
Same as the full description in the CMS dataset.
Parent Code
M75.2
Bicipital tendinitis

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM70-M79Other soft tissue disorders
CategoryM75Shoulder lesions
This CodeM75.21Bicipital tendinitis, right shoulder

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Biceps tendinitis
  • Bilateral tendinitis of long head of biceps brachii of shoulders
  • Bilateral tendon disorder of biceps brachii
  • Tendinitis of left biceps brachii
  • Tendinitis of long head of biceps brachii of left shoulder
  • Tendinitis of long head of biceps brachii of right shoulder
  • Tendinitis of right biceps brachii

Clinical ClassificationClinical

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

CCSR MUS009
Tendon and synovial 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 M75.21 to ICD-9-CMHistory

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

ICD-9-CM
726.12 Bicipital tenosynovitis
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 M75.21Overview

Is M75.21 (Bicipital tendinitis) a billable code?

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

What MS-DRG does M75.21 group to?

When bicipital tendinitis, 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 M75.21?

Under the General Equivalence Mappings, bicipital tendinitis, right shoulder converts to ICD-9-CM 726.12 (bicipital tenosynovitis). 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.