M65Non-billableSave
M65 - Synovitis and tenosynovitis
ICD-10-CM Chapter 13: Diseases of the musculoskeletal system and connective tissue · M65-M67 Disorders of synovium and tendon (M65-M67) · Top-level category · FY2027
Coding Guidance
M65 is a non-billable heading. Report one of the 7 more specific codes below.
Includes, Excludes and Coding Notes
Excludes 1 — Not Coded HereFrom M65
Mutually exclusive: these conditions are never reported together with this code.
- 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.-)
Excludes 2 — Not Included HereFrom Chapter M00-M99
Not part of this code; report both codes when the patient has both conditions.
- 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)
NotesFrom Chapter M00-M99
Instructional notes from the ICD-10-CM tabular list.
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
More Specific Codes (7)
M65.0Abscess of tendon sheathCategory→M65.1Other infective (teno)synovitisCategory→M65.2Calcific tendinitisCategory→M65.3Trigger fingerCategory→M65.4Radial styloid tenosynovitis [de Quervain]Billable→M65.8Other synovitis and tenosynovitisCategory→M65.9Synovitis and tenosynovitis, unspecifiedCategory→
Related condition guides
Documentation requirements, coding pitfalls and FAQs for conditions coded with M65.
Chapter Information
Chapter 13: Diseases of the musculoskeletal system and connective tissue
Range: M00-M99
View full chapterRelated ICD-10 Codes
More specific codes for M65
Other categories in this chapter
Codes at the same level as M65
- Pyogenic arthritisM00
- Direct infections of joint in infectious and parasitic diseases classified elsewhereM01
- Postinfective and reactive arthropathiesM02
- Autoinflammatory syndromesM04
- Rheumatoid arthritis with rheumatoid factorM05
- Other rheumatoid arthritisM06
- Enteropathic arthropathiesM07
- Juvenile arthritisM08
- GoutM10
- Other crystal arthropathiesM11
- Other and unspecified arthropathyM12
- Other arthritisM13
- Arthropathies in other diseases classified elsewhereM14
- PolyosteoarthritisM15
- Osteoarthritis of hipM16
- Osteoarthritis of kneeM17
- Osteoarthritis of first carpometacarpal jointM18
- Other and unspecified osteoarthritisM19
- Chronic goutM1A
- Acquired deformities of fingers and toesM20
- Other acquired deformities of limbsM21
- Disorder of patellaM22
- Internal derangement of kneeM23
- Other specific joint derangementsM24
- Other joint disorder, not elsewhere classifiedM25
- Dentofacial anomalies [including malocclusion]M26
- Other diseases of jawsM27
- Polyarteritis nodosa and related conditionsM30
- Other necrotizing vasculopathiesM31
- Systemic lupus erythematosus (SLE)M32
- DermatopolymyositisM33
- Systemic sclerosis [scleroderma]M34
- Other systemic involvement of connective tissueM35
- Systemic disorders of connective tissue in diseases classified elsewhereM36
- Kyphosis and lordosisM40
- ScoliosisM41
- Spinal osteochondrosisM42
- Other deforming dorsopathiesM43
- Ankylosing spondylitisM45
- Other inflammatory spondylopathiesM46
38 more in this chapter.