ICD-10-CM 2027
ICD-10 code for disease de quervain's
From the official ICD-10-CM alphabetic index entry “De Quervain's › disease (tendon sheath)”. Page updated September 29, 2026.
About coding disease de quervain's
The ICD-10-CM code for disease de quervain's is M65.4 (Radial styloid tenosynovitis [de Quervain]).
Within M65 (synovitis and tenosynovitis), M65.4 is specifically for radial styloid tenosynovitis [de Quervain]. Related codes cover abscess of tendon sheath (M65.0), other infective (teno)synovitis (M65.1), Calcific tendinitis (M65.2), Trigger finger (M65.3), other synovitis and tenosynovitis (M65.8) and unspecified (M65.9).
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.
Common questions about disease de quervain's ICD-10 codes
What is the ICD-10 code for disease de quervain's?
- M65.4 — Radial styloid tenosynovitis [de Quervain].
Is M65.4 billable?
- Yes. M65.4 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can M65.4 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict M65.4 as a principal diagnosis.
Is M65.4 a CC or MCC?
- No. M65.4 is neither a CC nor an MCC under MS-DRG v44.0.