Drug Coverage Lookup
See how a prescription drug is placed across Medicare Part D plan formularies — tier, prior authorization, step therapy, and quantity limits, counted per unique plan.
Horizant (Gabapentin Enacarbil)
Found on the formularies of 6 of 5499 Medicare Part D plans in this dataset · Tiers 1–4.
This is dataset-wide formulary placement (data current through 2026-08-31) — check your specific plan for its current coverage and restrictions.
| Plan | Tier | Prior Auth | Step Therapy | Qty Limit |
|---|---|---|---|---|
| Mass General Brigham SCO (HMO D-SNP) (H0777-001) (MA) | Tier 1 | No | No | None |
| Mass General Brigham One Care (HMO D-SNP) (H1611-001) (MA) | Tier 1 | No | No | None |
| Mass General Brigham Advantage (PPO) (H9485-001) (MA) | Tier 4 | No | No | None |
| Mass General Brigham Advantage Secure (HMO-POS) (H6847-001) (MA) | Tier 4 | No | No | None |
| Mass General Brigham Advantage Premier (PPO) (H9485-002) (MA) | Tier 4 | No | No | None |
| Mass General Brigham Advantage Signature (PPO) (H9485-003) (MA) | Tier 4 | No | No | None |
One row per plan; a Yes means the flag applies to at least one form/strength on that plan.
Acquisition cost (NADAC): $17.9293/unit — price effective 08/19/2026
Source: CMS Monthly Prescription Drug Plan Formulary and Pharmacy Network Information — data current through 2026-08-31 (CMS release 2026-08-26, refreshed monthly) · NADAC price effective 08/19/2026 (per-NDC last change, not a data-staleness date). Dataset-wide plan-year formulary placement, not a guarantee of your individual benefit — confirm with your plan or pharmacist.
Data: CMS Monthly Part D formulary files · FDA/RxNorm drug identity · CMS NADAC pricing — CMS Part D formulary data current through 2026-08-31 · source
GET https://insurewith.ai/tools/drug-coverage/data.json?drug=gabapentin-enacarbil