M99.65 ICD-10-CM Code: Osseous and subluxation stenosis of intervertebral foramina of pelvic region

M99.65 is the ICD-10-CM diagnosis code for osseous and subluxation stenosis of intervertebral foramina of pelvic region. Narrowing of the nerve passages in the spine due to bone overgrowth or misalignment in the pelvic region, which can cause pain or nerve compression. M99.65 sits in the ICD-10-CM chapter for diseases of the musculoskeletal system and connective tissue (m00-m99), within the section covering biomechanical lesions, not elsewhere classified (m99).

M99.65 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

This code specifically addresses osseous (bone) and subluxation stenosis, so document whether bone spurs, facet joint changes, or vertebral misalignment is present.