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.
Status
Non-billable / Header
Block
M15-M19
Child Codes
7
Coding Notes
Excludes 2
Conditions not included here, but the patient may have both
- 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)
- osteoarthritis of spine (M47.-)
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
Also Known As / Clinical Terms
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
Frequently Asked Questions
What is ICD-10 code M18?
ICD-10-CM code M18 represents "Osteoarthritis of first carpometacarpal joint". It 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.
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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.