Neurosurgery & Implantable Device • Medical Necessity & Prior Authorization

Deep Brain Stimulation (DBS) Surgery — Medical Necessity & Prior Authorization Checklist

Billing & Coverage Codes: CPT 61863, 61864, 61867, 61868 (Stereotactic Lead Implantation) • CPT 61885, 61886 (Pulse Generator) • CPT 95970, 95983 (Programming) • MS-DRG 024

Important Policy Notice — Not a Guarantee of Approval: Clinical coverage criteria change periodically and your health plan's official Evidence of Coverage and clinical policy determination are final. This checklist summarizes published CMS and commercial payer policies for educational preparation and is never a guarantee of approval.

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Plain-English Clinical Documentation Checklist

What Your Neurologist / Care Team Must Document in the Chart Note

To get unilateral or bilateral Deep Brain Stimulation (DBS) of the subthalamic nucleus (STN) or globus pallidus interna (GPi) approved, Medicare and major commercial insurers require your movement-disorder team to document the following 6 clinical criteria in your medical record:

1Confirmed diagnosis of idiopathic Parkinson's disease (ruled out secondary parkinsonism or atypical parkinsonian syndromes such as MSA, PSP, or CBD).

2Documented levodopa responsiveness — an formal ON/OFF levodopa challenge test typically showing ≥ 30% improvement in UPDRS / MDS-UPDRS Part III motor score (or refractory disabling rest tremor).

3Disabling motor fluctuations ('wearing-off', unpredictable ON/OFF states) and/or troublesome levodopa-induced dyskinesias despite optimal medical therapy (typically Hoehn & Yahr stage ≥ 2 in the OFF state).

4Adequate trial of optimized pharmacotherapy — documented trial of carbidopa/levodopa plus adjunctive classes (dopamine agonist, MAO-B inhibitor, and/or COMT inhibitor) unless contraindicated or not tolerated.

5Formal neuropsychological evaluation ruling out severe dementia or uncontrolled major depression/suicidality that would impair surgical outcomes or device management.

6Pre-operative Brain MRI showing no structural contraindication to stereotactic electrode trajectory, plus multidisciplinary DBS board sign-off (movement-disorder neurologist + functional neurosurgeon).

Published Clinical Policy Citations

CMS Medicare & Major Commercial Payer Policies

Medicare (Original Medicare & Medicare Advantage)Verified Oct 2026

CMS National Coverage Determination (NCD) 160.24 — Deep Brain Stimulation for Essential Tremor and Parkinson's Disease

Covers unilateral or bilateral thalamic (VIM) DBS for disabling tremor and STN/GPi DBS for patients with levodopa-responsive Parkinson's disease whose symptoms are not adequately controlled by medication (Hoehn & Yahr ≥ 2).

View Official Source Policy (https://www.cms.gov/medicare-coverage-database/view/ncd.aspx?ncdid=279)

UnitedHealthcare (Commercial & Medicare Advantage)Verified Oct 2026

UHC Medical Policy 2026T0531 — Deep Brain and Cortical Stimulation

Requires ≥ 4 years disease duration (standard PD), documented ON/OFF UPDRS Part III improvement ≥ 30%, refractory motor complications or tremor, and neuropsychological clearance.

View Official Source Policy (https://www.uhcprovider.com/en/policies-protocols/commercial-policies/commercial-medical-drug-policies.html)

Anthem Blue Cross (California)Verified Oct 2026

Anthem Clinical UM Guideline SURG.00026 — Deep Brain, Cortical, and Cerebellar Stimulation

Requires idiopathic PD with disabling motor fluctuations/dyskinesia or refractory tremor despite optimal pharmacotherapy, UPDRS Part III improvement ≥ 30% on levodopa challenge, and no severe cognitive impairment.

View Official Source Policy (https://www.anthem.com/ca/provider/policies/clinical-guidelines/)

AetnaVerified Oct 2026

Aetna Clinical Policy Bulletin (CPB) 0208 — Deep Brain Stimulation

Covers STN or GPi stimulation for levodopa-responsive idiopathic PD (Hoehn & Yahr ≥ 2 when OFF) with disabling motor fluctuations or dyskinesia unresponsive to medical therapy.

View Official Source Policy (https://www.aetna.com/health-care-professionals/clinical-policy-bulletins/medical-clinical-policy-bulletins.html)

CignaVerified Oct 2026

Cigna Medical Coverage Policy 0151 — Deep Brain Stimulation

Requires documented levodopa responsiveness, persistent disabling motor complications or tremor despite medical therapy, and absence of dementia.

View Official Source Policy (https://static.cigna.com/assets/chcp/resourceLibrary/coveragePolicies/)

Kaiser Permanente (Northern California)Verified Oct 2026

KP Regional Movement Disorder Neurosurgery Referral Criteria (Redwood City / Sacramento DBS Hubs)

Requires evaluation by a Kaiser Movement Disorder Neurologist, formal ON/OFF levodopa motor testing, neuropsychology clearance, and multidisciplinary DBS conference approval.

View Official Source Policy (https://healthy.kaiserpermanente.org/northern-california)

Other Parkinson's Medical Necessity Checklists

DaTscan SPECT (CPT 78803 + A9584)PT / OT / Speech & LSVT (CPT 97110, 97535, 92507)Home Health Care (CPT 99349 / G0151 / G0153)Duopa (J7340) & Vyalev Infusion Pumps Brand Parkinson's Drugs Prior Auth