M99.79
BillableConnective tissue and disc stenosis of intervertebral foramina of abdomen and other regions
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is M99.79 an HCC code?
No. M99.79 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
M99.79 is the ICD-10-CM diagnosis code for connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions. Narrowing of the nerve passages in the spine due to connective tissue and disc problems in the abdominal area or other body regions not specified elsewhere. M99.79 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).
M99.79 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.
Use this code as a catch-all for abdominal or unspecified regional stenosis when other M99.7x codes don't apply.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for M99.79 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code as a catch-all for abdominal or unspecified regional stenosis when other M99.7x codes don't apply
- •Document the specific anatomical region in the medical record for clarity and future reference