2018 ICD-10-CM Diagnosis Code M18

Osteoarthritis of first carpometacarpal joint

The following code(s) above M18 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 M18:
  • M00-M99
    2018 ICD-10-CM Range M00-M99

    Diseases of the musculoskeletal system and connective tissue

    Note
    • 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
  • M15-M19
    2018 ICD-10-CM Range M15-M19

    Osteoarthritis

    Type 2 Excludes
    • osteoarthritis of spine (M47.-)
    Osteoarthritis
Code History
ICD-10-CM Codes Adjacent To M18
M17.11 Unilateral primary osteoarthritis, right knee
M17.12 Unilateral primary osteoarthritis, left knee
M17.2 Bilateral post-traumatic osteoarthritis of knee
M17.3 Unilateral post-traumatic osteoarthritis of knee
M17.30 Unilateral post-traumatic osteoarthritis, unspecified knee
M17.31 Unilateral post-traumatic osteoarthritis, right knee
M17.32 Unilateral post-traumatic osteoarthritis, left knee
M17.4 Other bilateral secondary osteoarthritis of knee
M17.5 Other unilateral secondary osteoarthritis of knee
M17.9 Osteoarthritis of knee, unspecified
M18 Osteoarthritis of first carpometacarpal joint
M18.0 Bilateral primary osteoarthritis of first carpometacarpal joints
M18.1 Unilateral primary osteoarthritis of first carpometacarpal joint
M18.10 …… unspecified hand
M18.11 …… right hand
M18.12 …… left hand
M18.2 Bilateral post-traumatic osteoarthritis of first carpometacarpal joints
M18.3 Unilateral post-traumatic osteoarthritis of first carpometacarpal joint
M18.30 …… unspecified hand
M18.31 …… right hand
M18.32 …… left hand

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