Medicare Part D Pharmacy Network Participation Readiness

Last updated: November 2026. Regulation text checked 2026-11-05 (eCFR text built 2026-11-04).

Medicare Part D pharmacy network participation readiness is the credentialing packet, policy set and audit file that a pharmacy assembles to join Part D plan sponsor and pharmacy benefit manager (PBM) networks. Integral Healthcare Solutions (IHS) drafts that packet, the policies and the audit-readiness file for new and independent pharmacies, built from the terms each sponsor or PBM gives the pharmacy. The pharmacy signs its own contracts.

This is a program development engagement for pharmacy owners and pharmacists-in-charge, not contract negotiation and not legal advice.

What does 42 CFR 423.120 require about Part D pharmacy networks?

Section 423.120(a) requires a Part D sponsor to build a contracted retail pharmacy network that meets set access standards, except where (a)(7) waives them, and requires a sponsor offering qualified prescription drug coverage to contract with any pharmacy that meets the sponsor's standard terms and conditions. The governing text is 42 CFR 423.120, "Access to covered Part D drugs," on eCFR. We checked it on November 5, 2026 against the eCFR text built November 4, 2026; Title 42 was last amended October 8, 2026, and section 423.120 on April 15, 2025.

These network duties fall on Part D sponsors. In IHS's words, the points that matter to a pharmacy are:

• Open contracting. A Part D sponsor offering qualified prescription drug coverage must contract with any pharmacy that meets the sponsor's standard terms and conditions ((a)(8)(i)).
• Insurance risk. That sponsor may not require a pharmacy to accept insurance risk as a condition of participation in its network ((a)(8)(ii)).
• Cash price. That sponsor may not prohibit a pharmacy from, or penalize it for, telling a plan enrollee that a prescribed medication is available at the pharmacy at a cash price below the amount the enrollee would be charged to obtain the same medication through the enrollee's Part D plan ((a)(8)(iii)).
• Preferred pharmacies. For coverage other than defined standard coverage, (a)(9) permits lower copayments or coinsurance for covered Part D drugs at preferred pharmacies. These differences count toward § 423.104(d)(2), (d)(5) and (e) requirements and must not increase CMS payments under § 423.329.
• Long-term care. A sponsor must offer standard contracting terms, including performance and service criteria that CMS specifies, to all long-term care pharmacies in its service area ((a)(5)).
• Home infusion. Under (a)(4), sponsors must provide adequate access consistent with CMS written policy guidelines and other instructions. Plans must ensure network pharmacies can deliver clinically appropriate drug forms, support acute and chronic therapies, arrange necessary professional services and supplies before dispensing, and deliver within 24 hours of acute-care discharge or later if prescribed.
• Counting toward access. A sponsor may count I/T/U pharmacies and Federally Qualified Health Center and Rural Health Center pharmacies toward the access standards ((a)(2)).

Under (a)(1), access is measured separately in each State served by a PDP sponsor or regional MA organization, across a local MA organization’s entire service area, or across a cost contract’s entire geographic area. Subject to (a)(7), these averages cover Medicare beneficiaries near retail or (a)(2) network pharmacies:

Under (a)(7), CMS waives (a)(1) for an MA organization or cost contract using its own pharmacies only if its network meets § 422.112 or § 417.416(e), respectively. The waiver also covers an MA private fee-for-service plan described in § 422.4 that offers qualified prescription drug coverage and access to covered Part D drugs at all pharmacies, regardless of network status, without cost-sharing above § 423.104(d)(2) and (d)(5).

Who needs a Part D network participation readiness build, and what triggers it?

IHS offers this service to new and independent pharmacies preparing for network participation. Possible reasons to seek drafting support include:

• The pharmacy wants help organizing documents against network terms and audit protocols it has received.
• The pharmacy is considering long-term care or home infusion work, which (a)(5) and (a)(4) treat separately.
• The pharmacy is weighing preferred-network terms under (a)(9).

How does IHS prepare a pharmacy for Part D network participation?

IHS prepares the pharmacy in five steps, working as an outside drafting team under the pharmacist-in-charge.

1. Gap assessment. IHS reads the sponsor and PBM terms, credentialing requirements and audit protocols the pharmacy supplies, and lists what the pharmacy lacks.
2. Packet mapping. IHS builds a credentialing checklist and cover index tying each requested item to the document that shows it.
3. Drafting. IHS drafts the policy set aligned to the terms you supply, a contract term tracker and the audit-readiness file. The pharmacist-in-charge approves each one.
4. Mock desk audit. IHS reviews a sample of prescription records and the policies against the terms.
5. Readiness support. IHS drafts briefing notes and a packet index for your owner and staff.

What you supply: each sponsor's or PBM's terms, credentialing requirements and audit protocols; the licenses, NPI, registrations, insurance and accreditation records the pharmacy holds; and counsel's review of contract terms.

The real limit: section 423.120 does not provide a complete credentialing checklist or contract; IHS uses the pharmacy’s supplied terms alongside the applicable federal requirements. IHS does not negotiate or sign contracts for the pharmacy and does not communicate with sponsors, PBMs or CMS on its behalf. IHS gives no legal advice on contract terms or any-willing-pharmacy rights.

IHS was founded in 2002 and is led by Thomas G. Goddard, JD, PhD, former Chief Operating Officer and General Counsel of URAC. IHS has three practice lines: accreditation consulting, compliance services and program development. This program is program development.

What should a pharmacy have ready to join a Part D network?

This is IHS’s intake checklist. Licenses, identifiers, credentialing materials and audit samples are requested for drafting; § 423.120 does not prescribe this packet. Regulatory references below are to 42 CFR 423.120, “Access to covered Part D drugs” (current text checked November 5, 2026).

• Each sponsor's or PBM's standard terms and conditions, in writing ((a)(8)(i)).
• The credentialing requirements and audit protocol each one uses.
• Pharmacy licenses, NPI, registrations, insurance certificates and accreditation records.
• A contract term tracker showing, for each contract, the terms, dates and any provision on insurance risk ((a)(8)(ii)).
• A staff policy addressing (a)(8)(iii): informing a Part D enrollee that the same prescribed medication is available at this pharmacy for less in cash than through the enrollee’s plan.
• For preferred-network offers, the terms that make the pharmacy preferred and the copayment or coinsurance difference they create for covered drugs ((a)(9)).
• For long-term care work, the standard terms and the performance and service criteria the sponsor offers ((a)(5)).
• For home infusion work, a delivery procedure that meets the 24-hour post-discharge timing, or the later time a prescriber sets, and the other minimums in (a)(4)(i) to (iii).
• An audit-readiness file: policies, a prescription record sample and an index staff can pull on request.

If most of these do not exist yet, the free introductory call is the place to sort what to build first.

How does an outside readiness build compare with the other routes?

A pharmacy can prepare in several ways, and they are not exclusive. The table does not rank them.

What does Part D network participation readiness cost?

Section 423.120 sets no pharmacy participation fee. Ask each sponsor or PBM for its current fee terms.

IHS scopes each engagement after a free introductory call.

What this is not

This is not legal advice. IHS is a consulting firm, not a law firm. Contract terms and any-willing-pharmacy rights are for your counsel.

It is not contract negotiation. IHS does not sign for the pharmacy or communicate with sponsors, PBMs or CMS.

It is not a guarantee of network admission or a clean audit.

Frequently asked questions

What does 42 CFR 423.120 require of Part D sponsors about pharmacy networks?

Except where paragraph (a)(7) waives the access standards, a Part D sponsor must have a contracted network of retail pharmacies that meets the urban, suburban and rural access standards in (a)(1). A sponsor offering qualified prescription drug coverage must also contract with any pharmacy that meets its standard terms and conditions ((a)(8)(i)). These network duties fall on Part D sponsors.

Can a Part D sponsor refuse an independent pharmacy that meets its standard terms?

Under (a)(8)(i), a sponsor offering qualified prescription drug coverage must contract with any pharmacy that meets the sponsor's standard terms and conditions. The duty attaches to a pharmacy that meets those terms. Whether a sponsor has met its duty in a specific case is a question for your counsel.

What credentialing does a pharmacy need to join a Part D network?

Section 423.120 does not provide a complete pharmacy credentialing checklist. IHS uses the sponsor or PBM requirements you supply alongside applicable federal requirements and your pharmacy records.

How should an independent pharmacy prepare for a PBM audit?

Put the sponsor's or PBM's audit protocol beside your policies and prescription records, and close gaps before the audit. IHS drafts the audit-readiness file and runs a mock desk audit against the terms you supply.

Can a Part D sponsor make a pharmacy accept insurance risk?

Not as a condition of participating in the sponsor's contracted pharmacy network. Paragraph (a)(8)(ii) says a sponsor offering qualified prescription drug coverage may not require a pharmacy to accept insurance risk as a condition of participation.

May a plan stop a pharmacy from telling a patient about a lower cash price?

A sponsor offering qualified prescription drug coverage may neither prohibit nor penalize the disclosure described in (a)(8)(iii). That protection covers telling a Part D enrollee that the same prescribed medication is available at that pharmacy for a cash price below what the enrollee would pay through the Part D plan.

What is the difference between a preferred and a non-preferred network pharmacy?

For coverage other than defined standard coverage, (a)(9) permits lower copayments or coinsurance for covered Part D drugs at preferred pharmacies. These differences count toward § 423.104(d)(2), (d)(5) and (e) requirements and must not increase CMS payments under § 423.329. Network admission and preferred status are separate questions.

What network access standards must a sponsor meet for rural and urban areas?

Subject to the (a)(7) waivers, average access must reach at least 90 percent of Medicare beneficiaries in urban areas within 2 miles, 90 percent in suburban areas within 5 miles, and 70 percent in rural areas within 15 miles of a retail or (a)(2) network pharmacy. Measure each State separately for PDP sponsors and regional MA organizations, the entire service area for local MA organizations, and the entire geographic area for cost contracts ((a)(1)).

What is different about long-term care and home infusion pharmacy contracting?

A sponsor must offer standard contracting terms, including performance and service criteria CMS specifies, to all long-term care pharmacies in its service area ((a)(5)). Network home infusion pharmacies must, at a minimum, provide delivery of home infusion drugs within 24 hours of discharge from an acute care setting, or later if so prescribed ((a)(4)(iv)).

Related pages

See the Program Development overview | Compliance program development | Medicare Advantage and Part D compliance program.