2026 ICD-10-CM Diagnosis Code M12.012Chronic postrheumatic arthropathy [Jaccoud], left shoulder

ICD-10-CM Codes›M00–M99›M05-M14›M12

ICD-10-CM M12.012
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

M12.012 is a billable ICD-10-CM diagnosis code for chronic postrheumatic arthropathy [Jaccoud], left shoulder. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 553 through 554. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified chronic arthropathy.

Code Identity

ICD-10-CM Code
M12.012
Billable Status
Yes — Valid for Submission
Code Describes
Chronic postrheumatic arthropathy [Jaccoud], left shoulder
Short Description
Chronic postrheumatic arthropathy [Jaccoud], left shoulder
Same as the full description in the CMS dataset.
Parent Code
M12.01
Chronic postrheumatic arthropathy [Jaccoud], shoulder

Code Classification

ChapterM00–M99Diseases of the musculoskeletal system and connective tissue
SectionM05-M14Inflammatory polyarthropathies
CategoryM12Other and unspecified arthropathy
This CodeM12.012Chronic postrheumatic arthropathy [Jaccoud], left shoulder

Clinical ClassificationClinical

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

CCSR MUS005
Other specified chronic arthropathy
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Rheumatoid Arthritis

Rheumatoid arthritis (RA) is a form of arthritis that causes pain, swelling, and stiffness in your joints. RA is an autoimmune disease. Although it is most common in the wrist and fingers, this disease can cause your immune system to attack any joint tissue. The inflammation (swelling) that comes with RA can also affect other body parts.

The full article covers:

  • What is rheumatoid arthritis?
  • Who is more likely to get rheumatoid arthritis?
  • What causes rheumatoid arthritis?
  • What are the symptoms of rheumatoid arthritis?
  • How is rheumatoid arthritis diagnosed?
  • What are the treatments for rheumatoid arthritis?

Read the full article at MedlinePlus

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

Convert M12.012 to ICD-9-CMHistory

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

ICD-9-CM
714.4 Chr postrheum arthritis
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 M12.012Overview

Is M12.012 (Chronic postrheumatic arthropathy [Jaccoud], shoulder) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report chronic postrheumatic arthropathy [Jaccoud], left shoulder on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does M12.012 group to?

When chronic postrheumatic arthropathy [Jaccoud], left shoulder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 553, 554, with relative weights from 0.8301 to 1.2963 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of M12.012?

Under the General Equivalence Mappings, chronic postrheumatic arthropathy [Jaccoud], left shoulder converts to ICD-9-CM 714.4 (chr postrheum arthritis). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.