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ICD-10-CM 2027 diagnosis code

M65.841Other synovitis and tenosynovitis, right hand

✓ Billable / specific

M65.841 is a valid, billable ICD-10-CM code for other synovitis and tenosynovitis, right hand. 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 M65.841

M65.841 is the ICD-10-CM diagnosis code for other synovitis and tenosynovitis, right hand. It belongs to category M65 (synovitis and tenosynovitis), 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 M65.84 (other synovitis and tenosynovitis, hand), M65.841 is specifically for other synovitis and tenosynovitis, right hand. Related codes cover left hand (M65.842) and unspecified hand (M65.849).

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 727.05 (other tenosynovitis of hand and wrist).

Notes that apply from higher levels

Instructions written at a parent level also apply to M65.841.

› From M65 Synovitis and tenosynovitis
Excludes1
  • chronic crepitant synovitis of hand and wrist (M70.0-)
  • current injury - see injury of ligament or tendon by body region
  • soft tissue disorders related to use, overuse and pressure (M70.-)

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 →
  • 727.05Other tenosynovitis of hand and wristapproximate

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 M65.841

Is M65.841 billable?

Yes. M65.841 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can M65.841 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict M65.841 as a principal diagnosis.

Is M65.841 a CC or MCC?

No. M65.841 is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does M65.841 group to?

M65.841 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 M65.841?

The CMS General Equivalence Mappings map M65.841 to ICD-9-CM 727.05.