G56.82
BillableOther specified mononeuropathies of left upper limb
Last updated: FY2026 ICD-10-CM (Oct 1, 2025 – Sep 30, 2026) | CMS-HCC V28 (100% phase-in, PY2026)
Is G56.82 an HCC code?
No. G56.82 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
G56.82 is the ICD-10-CM diagnosis code for other specified mononeuropathies of left upper limb. This code describes a nerve problem affecting the left arm that doesn't fit into other specific nerve injury categories. It represents damage or dysfunction to a single nerve in the left upper limb that causes weakness, numbness, or pain. G56.82 sits in the ICD-10-CM chapter for diseases of the nervous system (g00-g99), within the section covering nerve, nerve root and plexus disorders (g50-g59).
G56.82 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 only when the mononeuropathy is not better described by more specific codes (G56.0-G56.81), such as carpal tunnel syndrome or ulnar nerve compression.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for G56.82 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Use this code only when the mononeuropathy is not better described by more specific codes (G56.0-G56.81), such as carpal tunnel syndrome or ulnar nerve compression
- •Always specify laterality (left side in this case) and document the specific nerve affected in the medical record to support accurate coding