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ICD-10-CM 2027 diagnosis code

M06.312Rheumatoid nodule, left shoulder

✓ Billable / specific

M06.312 is a valid, billable ICD-10-CM code for rheumatoid nodule, left shoulder. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About M06.312

M06.312 is the ICD-10-CM diagnosis code for rheumatoid nodule, left shoulder. It belongs to category M06 (other rheumatoid arthritis), block M05-M14 (inflammatory polyarthropathies) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M06.31 (rheumatoid nodule, shoulder), M06.312 is specifically for rheumatoid nodule, left shoulder. Related codes cover right shoulder (M06.311) and unspecified shoulder (M06.319).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 545 (Connective Tissue Disorders with MCC, relative weight 2.3892), DRG 546 (Connective Tissue Disorders with CC, relative weight 1.1745) and DRG 547 (Connective Tissue Disorders without CC/MCC, relative weight 0.7526), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 714.0 (rheumatoid arthritis).

Notes that apply from higher levels

Instructions written at a parent level also apply to M06.312.

Broader instructions also apply from Chapter 13: Diseases of the musculoskeletal system and connective tissue.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 714.0Rheumatoid arthritisapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about M06.312

Is M06.312 billable?

Yes. M06.312 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M06.312 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M06.312 as a principal diagnosis.

Is M06.312 a CC or MCC?

No. M06.312 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M06.312 group to?

M06.312 is used in the MS-DRG v44.0 logic for MS-DRG 545 (Connective Tissue Disorders with MCC), MS-DRG 546 (Connective Tissue Disorders with CC) and MS-DRG 547 (Connective Tissue Disorders without CC/MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for M06.312?

The CMS General Equivalence Mappings map M06.312 to ICD-9-CM 714.0.