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ICD-10-CM 2027 diagnosis code

M67.369Transient synovitis, unspecified knee

✓ Billable / specific

M67.369 is a valid, billable ICD-10-CM code for transient synovitis, unspecified knee. 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 M67.369

M67.369 is the ICD-10-CM diagnosis code for transient synovitis, unspecified knee. It belongs to category M67 (other disorders of synovium and tendon), block M65-M67 (disorders of synovium and tendon) 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 M67.36, choose M67.369 (unspecified knee) only when documentation doesn't support a more specific option: right knee (M67.361) and left knee (M67.362).

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 557 (Tendonitis, Myositis and Bursitis with MCC, relative weight 1.489) and DRG 558 (Tendonitis, Myositis and Bursitis without MCC, relative weight 0.8875), 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 727.09 (other synovitis and tenosynovitis).

Notes that apply from higher levels

Instructions written at a parent level also apply to M67.369.

› From M67.3 Transient synovitis
Excludes1
  • palindromic rheumatism (M12.3-)
› From M67 Other disorders of synovium and tendon
Excludes1
  • palmar fascial fibromatosis [Dupuytren] (M72.0)
  • tendinitis NOS (M77.9-)
  • xanthomatosis localized to tendons (E78.2)

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.

MDC 08 · Diseases and Disorders of the Musculoskeletal System and Connective Tissue

ICD-9-CM equivalent

Converter →
  • 727.09Other synovitis and tenosynovitisapproximate

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 M67.369

Is M67.369 billable?

Yes. M67.369 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M67.369 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M67.369 as a principal diagnosis.

Is M67.369 a CC or MCC?

No. M67.369 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M67.369 group to?

M67.369 is used in the MS-DRG v44.0 logic for MS-DRG 557 (Tendonitis, Myositis and Bursitis with MCC) and MS-DRG 558 (Tendonitis, Myositis and Bursitis without 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 M67.369?

The CMS General Equivalence Mappings map M67.369 to ICD-9-CM 727.09.