M18
Non-billableOsteoarthritis of first carpometacarpal joint
Osteoarthritis of first carpometacarpal joint
This is a header/category code. For billing purposes, use a more specific child code from the list below.
Coding Notes
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
- •osteoarthritis of spineM47
Child Codes (7)
M18.0Bilateral primary osteoarth of first carpometacarp joints
M18.1Unilateral primary osteoarth of first carpometacarp joint
M18.2Bi post-trauma osteoarth of first carpometacarp joints
M18.3Unil post-trauma osteoarth of first carpometacarp joint
M18.4Oth bi secondary osteoarth of first carpometacarp joints
M18.5Oth unil secondary osteoarth of first carpometacarp joint
M18.9Osteoarthritis of first carpometacarpal joint, unspecified
Related Conditions
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(6)
UMLS
- Osteoarthritis basilar joint of thumbC0409956
- Osteoarthritis of first carpometacarpal jointC0409956
- Osteoarthritis of first carpometacarpal joint, unspecifiedC0409956
- Osteoarthritis of the first carpometacarpal jointC0409956
- Osteoarthrosis of the carpometacarpal joint of the thumbC0409956
- Osteoarthrosis of the carpometacarpal joint of the thumb (disorder)C0409956
Related ICF Categories(35)
The ICF Core Set for Osteoarthritis identifies functioning domains commonly assessed with this condition.
Energy and drive functions
Sleep functions
Emotional functions
Sensation of pain
Exercise tolerance functions
Mobility of joint functions
Stability of joint functions
Muscle power functions
Muscle tone functions
Muscle endurance functions
Gait pattern functions
Carrying out daily routine
Changing basic body position
Maintaining body position
Lifting and carrying objects
Hand and arm use
Walking
Moving around
Driving
Washing oneself
Toileting
Dressing
Doing housework
Acquiring, keeping and terminating a job
Remunerative employment
Community life
Recreation and leisure
Products or substances for personal consumption
Immediate family
Health professionals
Individual attitudes of immediate family members
Individual attitudes of health professionals
Transportation services, systems and policies
Social security services, systems and policies
Health services, systems and policies
Frequently Asked Questions
What is the ICD-10 code for osteoarthritis of first carpometacarpal joint?
The ICD-10-CM code for osteoarthritis of first carpometacarpal joint is M18. The full clinical description is "Osteoarthritis of first carpometacarpal joint". M18 is a non-billable header code. Use a more specific child code for billing purposes.
What does ICD-10 code M18 mean?
ICD-10-CM code M18 represents “Osteoarthritis of first carpometacarpal joint”. 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 M18 a billable code?
No, M18 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 M18.
What chapter is M18 in?
M18 is in Chapter 13: Diseases of the Musculoskeletal System and Connective Tissue (codes M00-M99).
What are the subcategories under M18?
M18 has 7 child codes, including: M18.0 (Bilateral primary osteoarth of first carpometacarp joints), M18.1 (Unilateral primary osteoarth of first carpometacarp joint), M18.2 (Bi post-trauma osteoarth of first carpometacarp joints), M18.3 (Unil post-trauma osteoarth of first carpometacarp joint), and 3 more.
What are the UMLS CUIs for M18?
M18 is linked to 1 UMLS Concept Unique Identifier: C0409956. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
What ICF functioning codes are related to osteoarthritis of first carpometacarpal joint?
The ICF Core Set for Osteoarthritis includes 35 functioning categories covering body functions, activities, and environmental factors commonly assessed with this condition. Browse the ICF directory.
What is the ICD-11 equivalent of M18?
M18 maps to the ICD-11 code: FA02.Z (Osteoarthritis of wrist or hand, unspecified).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
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.