Varies by plan

Does Zing Health Of Michigan, INC. require prior authorization for XIFAXAN?

Prior authorization for XIFAXAN differs across Zing Health Of Michigan, INC.'s Medicare Part D plans and product strengths — 1 of 2 XIFAXAN products in the corpus appear on their formularies, and the requirement is not uniform. Check the member's specific plan.

Some plans require authorization and others do not. The member's specific plan decides.

This drug does not appear on any of this payer's Medicare Part D formularies. That means it is NOT COVERED under those plans — which is a different and generally worse outcome than requiring prior authorization. An exception or formulary-exception request may still be possible.

By product strength

RxNorm product	Plans covering	Require prior auth	Step therapy	Qty limit	Status
rifaximin 200 MG Oral Tablet [XIFAXAN]539789	0 / 33	0	0	0	Not on formulary
rifaximin 550 MG Oral Tablet [XIFAXAN]856666	33 / 33	33	0	0	Prior authorization required

Product names come from RxNorm (U.S. National Library of Medicine).

Plan-by-plan detail — rifaximin 550 MG Oral Tablet [XIFAXAN]

XIFAXAN has 2 products in the corpus; this table is for rifaximin 550 MG Oral Tablet [XIFAXAN], the one carried on the most plans. The product table above covers every strength.

Plan	Contract	Tier	Prior auth	Step therapy	Qty limit
Zing Choice IL (HMO)	H4624-001	5	Yes	No	No
Zing Elite Balance MI (HMO C-SNP)	H4624-046	5	Yes	No	No
Zing Elite Diabetes & Heart IL (HMO C-SNP)	H4624-028	5	Yes	No	No
Zing Elite Diabetes & Heart IN (HMO C-SNP)	H4624-031	5	Yes	No	No
Zing Elite Diabetes & Heart MI (HMO C-SNP)	H4624-032	5	Yes	No	No
Zing Elite Diabetes & Heart OH (HMO C-SNP)	H4624-033	5	Yes	No	No
Zing Elite Diabetes & Heart TN-MS (HMO C-SNP)	H4624-039	5	Yes	No	No
Zing Elite Essentials Diabetes & Heart IL-IN (HMO C-SNP)	H4624-045	5	Yes	No	No
Zing Elite Select IL-IN (HMO)	H4624-026	5	Yes	No	No
Zing Elite Select MI (HMO)	H4624-022	5	Yes	No	No
Zing Elite Select OH (HMO)	H4624-037	5	Yes	No	No
Zing Elite Select TN-MS (HMO)	H4624-043	5	Yes	No	No
Zing Essential Wellness Diabetes & Heart IL (HMO C-SNP)	H4624-010	5	Yes	No	No
Zing Open Choice Diabetes & Heart IN (PPO C-SNP)	H6876-005	5	Yes	No	No
Zing Open Choice Diabetes & Heart MI (PPO C-SNP)	H6876-003	5	Yes	No	No
Zing Open Choice Diabetes & Heart TN (PPO C-SNP)	H6876-007	5	Yes	No	No
Zing Open Choice IN (PPO)	H6876-004	5	Yes	No	No
Zing Open Choice MI (PPO)	H6876-001	5	Yes	No	No
Zing Open Choice TN (PPO)	H6876-009	5	Yes	No	No
Zing Select Care IN (HMO)	H4624-003	5	Yes	No	No
Zing Select Care MI (HMO)	H4624-006	5	Yes	No	No
Zing Select Care OH (HMO)	H4624-038	5	Yes	No	No
Zing Select Care TN-MS (HMO)	H4624-044	5	Yes	No	No
Zing Select Diabetes & Heart Complete IL (HMO C-SNP)	H4624-027	5	Yes	No	No
Zing Select Diabetes & Heart IN (HMO C-SNP)	H4624-011	5	Yes	No	No
Zing Select Diabetes & Heart MI (HMO C-SNP)	H4624-012	5	Yes	No	No
Zing Select Diabetes & Heart OH (HMO C-SNP)	H4624-034	5	Yes	No	No
Zing Select Diabetes & Heart TN-MS (HMO C-SNP)	H4624-040	5	Yes	No	No
Zing Select Dialysis IL (HMO C-SNP)	H4624-029	5	Yes	No	No
Zing Select Dialysis IN (HMO C-SNP)	H4624-025	5	Yes	No	No
Zing Select Dialysis MI (HMO C-SNP)	H4624-023	5	Yes	No	No
Zing Select Dialysis OH (HMO C-SNP)	H4624-036	5	Yes	No	No
Zing Select Dialysis TN-MS (HMO C-SNP)	H4624-042	5	Yes	No	No

Source

Monthly Prescription Drug Plan Formulary and Pharmacy Network Information — Basic Drugs Formulary File

Effective: 2026-06-30
Retrieved: 2026-07-19
SHA-256: e626e6bcda1aa6a0071e6f0df6bafe686ae41842cdf0a9feffdc649b6d3ff3ae

We publish the hash of the exact file we ingested so any answer can be audited against the bytes CMS served that day.

XIFAXAN at other payers

Or see XIFAXAN across every payer at once.

Administrative information only. Benefily reports what a payer has published in its own prior-authorization policy as of the effective date shown. It is not medical advice, not a coverage or payment guarantee, and not an authorization. Requirements vary by plan, place of service and member benefits — always verify with the payer before rendering service.