XIFAXAN 200 mg Tablet

Also known as Rifaximin. Coverage in Missouri (CMS PDP Region 18).

7 of 10 stand-alone Part D plans in Missouri cover this drug on tier 4.

7 of 7 plans apply a prior authorization, step therapy or quantity limit.

78 Medicare Advantage plans in MO do cover it

Medicare Advantage plans carry their own formularies, separate from stand-alone Part D. A patient on an MA-PD plan may have coverage even where no PDP lists the drug. MO: 78 plans.

Every plan that covers it

Plan	Tier	30-day preferred	90-day mail	Unit cost	Est. 30-day fill	Restrictions
Humana Basic Rx Plan (PDP)$16.50/mo premium · $615.00 deductible	4Non-Preferred Drug	35%	—	$11.3686	$102.329 units	Prior authorization Quantity limit 9 per 30 days
Humana Value Rx Plan (PDP)$33.70/mo premium · $601.00 deductible	4Non-Preferred Drug	34%	—	$11.3686	$102.329 units	Prior authorization Quantity limit 9 per 30 days
HealthSpring Extra Rx (PDP)$70.70/mo premium · $615.00 deductible	4Non-Preferred Drug	30%	30%	$12.2555	$110.309 units	Prior authorization Quantity limit 9 per 30 days
AARP Medicare Rx Saver from UHC (PDP)$71.90/mo premium · $615.00 deductible	4Non-Preferred Drug	39%	—	$13.4959	—	Prior authorization
HealthSpring Assurance Rx (PDP)$74.30/mo premium · $615.00 deductible	4Non-Preferred Drug	30%	30%	$12.2536	$110.289 units	Prior authorization Quantity limit 9 per 30 days
AARP Medicare Rx Preferred from UHC (PDP)$125.40/mo premium · $130.00 deductible	4Non-Preferred Drug	35%	—	$13.4959	—	Prior authorization
Humana Premier Rx Plan (PDP)$126.40/mo premium · $0.00 deductible	4Non-Preferred Drug	50%	50%	$11.3686	$102.329 units	Prior authorization Quantity limit 9 per 30 days

Cost-sharing is the initial coverage phase at a preferred pharmacy; a percentage is coinsurance of the plan’s negotiated price, and the deductible may apply first. CMS publishes a negotiated price per unit, so the 30-day fill is shown only where the plan’s own quantity limit supplies the quantity.

See coverage in all 39 regions →