Oth unil secondary osteoarth of first carpometacarp joint
Other unilateral secondary osteoarthritis of first carpometacarpal joint
M18.5 is a header (parent) code in the ICD-10-CM hierarchy. It is not billable for claim submission. Use one of the billable child codes listed below.
Billable codes in this category
Each of the codes below is billable. Choose the one that most accurately describes the patient's diagnosis.
Unilateral secondary osteoarthritis of the first carpometacarpal (CMC) joint arising from a cause other than post-traumatic injury or primary degeneration, affecting one hand when laterality is not specified in the documentation.
M18.51 identifies other unilateral secondary osteoarthritis of the first carpometacarpal (CMC) joint of the right hand — meaning CMC joint OA caused by a secondary process other than trauma.
Secondary osteoarthritis of the left thumb carpometacarpal (CMC) joint arising from a cause other than post-traumatic origin — classified as unilateral, affecting the left hand only.
Inclusion & exclusion notes
Includes
- Secondary osteoarthritis of first carpometacarpal joint NOS