2020 ICD-10-CM Diagnosis Code M65.4

Radial styloid tenosynovitis [de Quervain]

    2016 2017 2018 2019 2020 Billable/Specific Code
  • M65.4 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2020 edition of ICD-10-CM M65.4 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of M65.4 - other international versions of ICD-10 M65.4 may differ.
The following code(s) above M65.4 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to M65.4:
  • M00-M99
    2020 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    • Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
    Type 2 Excludes
    • arthropathic psoriasis (L40.5-)
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • compartment syndrome (traumatic) (T79.A-)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the musculoskeletal system and connective tissue
  • M65
    ICD-10-CM Diagnosis Code M65

    Synovitis and tenosynovitis

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • 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.-)
    Synovitis and tenosynovitis
Approximate Synonyms
  • Radial styloid tenosynovitis
  • Tendonitis, dequervains
  • Tenosynovitis of bilateral radial styloid
  • Tenosynovitis of left radial styloid
  • Tenosynovitis of radial styloid
  • Tenosynovitis of right radial styloid
Clinical Information
  • Stenosing tenosynovitis of the abductor pollicis longus and extensor pollicis brevis tendons in the first dorsal wrist compartment. The presenting symptoms are usually pain and tenderness at the radial styloid. The cause is almost always related to overuse injury or is associated with rheumatoid arthritis.
ICD-10-CM M65.4 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 557 Tendonitis, myositis and bursitis with mcc
  • 558 Tendonitis, myositis and bursitis without mcc

Convert M65.4 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change

Diagnosis Index entries containing back-references to M65.4:

ICD-10-CM Codes Adjacent To M65.4
M65.332 Trigger finger, left middle finger
M65.339 Trigger finger, unspecified middle finger
M65.34 Trigger finger, ring finger
M65.341 Trigger finger, right ring finger
M65.342 Trigger finger, left ring finger
M65.349 Trigger finger, unspecified ring finger
M65.35 Trigger finger, little finger
M65.351 Trigger finger, right little finger
M65.352 Trigger finger, left little finger
M65.359 Trigger finger, unspecified little finger
M65.4 Radial styloid tenosynovitis [de Quervain]
M65.8 Other synovitis and tenosynovitis
M65.80 …… unspecified site
M65.81 Other synovitis and tenosynovitis, shoulder
M65.811 Other synovitis and tenosynovitis, right shoulder
M65.812 Other synovitis and tenosynovitis, left shoulder
M65.819 Other synovitis and tenosynovitis, unspecified shoulder
M65.82 Other synovitis and tenosynovitis, upper arm
M65.821 Other synovitis and tenosynovitis, right upper arm
M65.822 Other synovitis and tenosynovitis, left upper arm
M65.829 Other synovitis and tenosynovitis, unspecified upper arm

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.