Osteoarthritis of hip
Osteoarthritis of hip
M16 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.
Idiopathic degenerative joint disease affecting both hips simultaneously, classified as primary (not caused by trauma, dysplasia, or other underlying condition).
Bilateral osteoarthritis of both hips caused by underlying developmental hip dysplasia, where abnormal socket coverage accelerates cartilage breakdown and leads to secondary degenerative joint disease.
Post-traumatic osteoarthritis affecting both hip joints simultaneously, arising as a direct consequence of prior trauma to each hip rather than from primary degeneration or dysplasia.
M16.6 classifies bilateral hip osteoarthritis that is secondary in origin but does not arise from hip dysplasia or prior trauma — the two secondary causes assigned their own dedicated codes (M16.2 and M16.4).
Unilateral hip osteoarthritis that developed secondary to a cause other than trauma or dysplasia — such as metabolic disease, inflammatory arthritis, or avascular necrosis — affecting one hip only.
M16.9 is the catch-all billable code for hip osteoarthritis when the clinical record does not specify laterality, etiology (primary, post-traumatic, dysplastic, or other secondary), or bilaterality — use it only when none of those details can be established from the documentation.