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Chlordiazepoxide is a generic drug. What agents check before quoting it: how many 2026 Part D plans cover it, on which tier, with what restrictions and copays, by plan type, carrier and state.
In 2026, 1,443 of 5,496 Medicare Part D and Medicare Advantage drug plans (26.3%) list Chlordiazepoxide on their formulary, across 115 of 328 formularies. The most common placement is tier 4 (694 plans, 48.1% of those covering it). 663 of the covering plans require prior authorization (45.9%), 0 step therapy and 1,236 a quantity limit.
469 covering plans charge a flat copay for a 30-day supply at a preferred retail pharmacy after the deductible — median $0, 302 of them $0; 974 charge coinsurance instead — median 25% of the drug's cost. Once a member's out-of-pocket drug spending reaches $2,100 in 2026, covered drugs cost $0 for the rest of the year.
2025: 2,532 of 5,631 plans covered it (45%); 2026: 1,443 of 5,496 (26.3%).
Of 4,368 plans offered in both years, 63 added it to the formulary and 960 dropped it.
Among plans covering it both years, 64 moved it to a higher tier and 0 to a lower one; 0 added prior authorization and 0 removed it.
Medicare Part D paid for 104,866 30-day fills of Chlordiazepoxide in 2024 for about 25,821 enrollees, at an average total cost of $9.68 per 30-day fill (CMS Part D Prescribers by Geography and Drug, national).
Price Chlordiazepoxide and the rest of a client's list on every plan in their county.
Estimate Chlordiazepoxide costs by plan
Free tools for licensed insurance agents. Data from CMS public files; verify with plan documents before advising a client.
Counts are over every Medicare Advantage drug plan and stand-alone Part D plan in the CMS monthly formulary files, excluding employer plans. A plan counts as covering a drug when any strength or form of it is on the plan’s formulary; the tier, prior authorization, step therapy and quantity limit shown are the most favorable version on that formulary. Copays are for a 30-day supply at a preferred retail pharmacy after the deductible. This is a reference for licensed agents, not a plan recommendation; verify with the plan’s formulary before advising a client. Source: CMS Part D formulary files (release 09/16/2026). CMS formulary data.