2026 ICD-10-CM Diagnosis Code M67.212Synovial hypertrophy, not elsewhere classified, left shoulder
ICD-10-CM Codes›M00–M99›M65-M67›M67
- Billable — Valid for Submission
- Not Chronic
M67.212 is a billable ICD-10-CM diagnosis code for synovial hypertrophy, not elsewhere classified, left 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 hypertrophy of synovium of bilateral glenohumeral joints. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Tendon and synovial disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Hypertrophy of synovium of bilateral glenohumeral joints
- Hypertrophy of synovium of glenohumeral joint
- Hypertrophy of synovium of left glenohumeral joint
- Hypertrophy of synovium of right glenohumeral joint
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
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Convert M67.212 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About M67.212Overview
Is M67.212 (Synovial hypertrophy, not elsewhere classified, shoulder) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report synovial hypertrophy, not elsewhere classified, left shoulder on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does M67.212 group to?
When synovial hypertrophy, not elsewhere classified, left 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 M67.212?
Under the General Equivalence Mappings, synovial hypertrophy, not elsewhere classified, left shoulder converts to ICD-9-CM 727.89 (synov/tend/bursa 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.
