M65
Non-billableSynovitis and tenosynovitis
Synovitis and tenosynovitis
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- •chronic crepitant synovitis of hand and wristM70.0
- current injury - see injury of ligament or tendon by body region
- •soft tissue disorders related to use, overuse and pressureM70
Excludes 2
Conditions not included here, but the patient may have both
- •arthropathic psoriasisL40.5
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •compartment syndrome (traumatic)A-)T79
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
Child Codes (7)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(3)
Frequently Asked Questions
What is the ICD-10 code for synovitis and tenosynovitis?
The ICD-10-CM code for synovitis and tenosynovitis is M65. The full clinical description is "Synovitis and tenosynovitis". M65 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code M65 mean?
ICD-10-CM code M65 represents “Synovitis and tenosynovitis”. It is classified under Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue and is a non-billable header code. Use a more specific child code for billing purposes.
Is M65 a billable code?
No, M65 is a non-billable header code. You need to use one of its more specific child codes for billing. There are 7 child codes under M65.
What chapter is M65 in?
M65 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).
What codes cannot be used with M65?
M65 has Excludes1 notes indicating codes that cannot be used together with it, including: 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.-).
What are the subcategories under M65?
M65 has 7 child codes, including: M65.0 (Abscess of tendon sheath), M65.1 (Other infective (teno)synovitis), M65.2 (Calcific tendinitis), M65.3 (Trigger finger), and 3 more.
What are the UMLS CUIs for M65?
M65 is linked to 1 UMLS Concept Unique Identifier: C0039104. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does M65 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like synovitis and tenosynovitis affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of M65?
M65 maps to the ICD-11 code: FB40.Z (Tenosynovitis, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.