M99.65Osseous 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. It belongs to category M99 (biomechanical lesions, not elsewhere classified), block M99 (biomechanical lesions, not elsewhere classified) and chapter 13 (diseases of the musculoskeletal system and connective tissue). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within M99.6 (osseous and subluxation stenosis of intervertebral foramina), M99.65 is specifically for osseous and subluxation stenosis of intervertebral foramina of pelvic region. Related codes cover of head region (M99.60), of cervical region (M99.61), of thoracic region (M99.62), of lumbar region (M99.63), of sacral region (M99.64), of lower extremity (M99.66), of upper extremity (M99.67), of rib cage (M99.68) and 1 more.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 551 (Medical Back Problems with MCC, relative weight 1.6358) and DRG 552 (Medical Back Problems without MCC, relative weight 0.9584), in MDC 08 (Diseases and Disorders of the Musculoskeletal System and Connective Tissue), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 724.09 (spinal stenosis, other region).