Aventi vs SunRx: choosing between a PBM-owned 340B TPA and an independent one
SunRx is a San Diego-based 340B administrator that has managed 340B programs since 2006. It says it is a wholly-owned subsidiary of MedImpact Healthcare Systems, a pharmacy benefit manager.[1][2] That makes SunRx different from TPAs owned by a wholesaler or a pharmacy chain: its parent's core business is managing pharmacy benefits for health plans and employers. This page compares SunRx and Aventi on what matters to a covered entity, covers what MedImpact's 2026 deals mean for SunRx clients, and lists the questions to ask before you renew.
Aventi Health is an independent, founder-owned 340B TPA serving 300 covered entities, 24 of them hospitals.
Last updated: . Every statement about SunRx and MedImpact links to a public source.
One parent, both sides of the pharmacy benefit
SunRx works for covered entities. Its parent, MedImpact, works for the plans that pay pharmacy claims.
Your 340B program
SunRx
Administers 340B for hospitals, health centers and their contract pharmacies: eligibility, contract pharmacy networks, split billing, referral capture and an uninsured 340B prescription discount card.[1][3]
Health plans and employers
MedImpact
Serves employers and commercial and government health plans covering more than 20 million consumers, including hospital-based employers. MedImpact says its 340B solutions are offered through SunRx.[11]
SunRx presents the PBM connection as a strength. It says its uninsured 340B prescription discount card is unique in the market because SunRx is owned by a PBM, and that it confirms 340B eligibility in real time at the pharmacy and applies a "lower-of" price calculation for the patient.[2][18] MedImpact says the SunRx team has extensive pharmacy benefit management and payer experience.[11]
We are not aware of any public allegation that MedImpact or SunRx has misused 340B data. Still, when one company is both your 340B administrator and a PBM for health plans, it is reasonable to ask how the two businesses are separated, especially if your hospital also uses MedImpact as its employee pharmacy benefit manager.
MedImpact in 2026: a growing PBM group
Here is what SunRx's parent has announced since 2024, from public sources.
February 2024
MedImpact acquired Elixir Solutions, Rite Aid's PBM.[13]
February 2, 2026
MedImpact completed its acquisition of Sav-Rx, a PBM serving organized labor.[12]
March 2026
MedImpact acquired risk management firms MHW Benefit Partners and MSL Captive Solutions.[13]
October 26, 2026
MedImpact agreed to acquire VytlOne's PBM business and the Gateway Health Partners rebate aggregator from Maxor. VytlOne's 340B, specialty and fulfillment assets are not part of the deal.[13][14]
November 3, 2026
The Oregon Health Authority accepted the notice for the Maxor deal and began its review. It lists 340B program services among MedImpact's lines of business.[14]
None of these deals changes SunRx's services, as far as public sources show. For a covered entity, the practical point is that SunRx's priorities are set inside a PBM group that is focused on plans, employers and rebate aggregation, and that is still adding companies.[12][13]
Data security is part of the same picture. MedImpact has published a notice about a cybersecurity incident it identified on October 18, 2025, involving information about members of pharmacy benefit plans administered by MedImpact and Elixir Solutions. It notified clients on August 13, 2026 and began mailing notices to individuals on September 25, 2026.[15] The notice does not mention SunRx or 340B data. It is still fair to ask SunRx which systems, staff and security controls it shares with its parent.
Five questions to ask SunRx in writing
- Is our 340B claims and eligibility data kept separate from MedImpact's PBM operations, and who at MedImpact can access it?
- If MedImpact is also the PBM for our employee health plan, how are those two relationships kept apart?
- Which systems, hosting environments and security teams does SunRx share with MedImpact?
- Is Command340B (Assist340B, Edge340B and the reporting modules) included in our TPA fees, or priced separately?
- If we leave, what data do we get back (claims, accumulators, CDM-to-NDC crosswalk, discount card records, 340B ESP and Beacon submissions), in what format, and how fast?
Aventi has no PBM, wholesaler or pharmacy chain on the other side of your claims. You see every claim in the same system we use to qualify it.
Aventi vs SunRx, side by side
SunRx details come from sunrx.com and medimpact.com, checked November 5, 2026. Where SunRx has not published something, we say so.
| Aventi Health | SunRx (MedImpact) | |
|---|---|---|
| Parent company | None: independent and founder-owned | MedImpact Healthcare Systems, a PBM (wholly-owned subsidiary)[2] |
| Scale | 300 covered entities, 24 of them hospitals | Managing 340B programs since 2006; does not publish a covered entity count[1] |
| Who they serve | Hospitals, health centers and other covered entities | Hospitals, health centers and FQHCs, their contract pharmacies, and uninsured patients[1][11] |
| Contract pharmacy | Real-time claim capture and purchase splitting, so no end-of-month true-ups. 10,000+ pharmacies, with specialty integrations and a gateway with BioPlus, Accredo, Optum and many others | Bill-at-capture and bill-at-replenishment models; an in-house Pharmacy Department recruits pharmacies, negotiates dispensing fees and handles contracting[3] |
| Split billing | Split billing on the same platform as contract pharmacy | Wholesaler- and IT-neutral split billing with PO splitting, PO optimization, PO reconciliation and a CDM-to-NDC crosswalk SunRx builds and maintains[4] |
| Referral capture | Referral capture beyond your walls, with a dedicated account manager | Built-in referral capture, plus Advanced Claims Capture from AuthorityRx, which SunRx acquired in 2023[7][19] |
| Manufacturer data platforms | Real-time 340B ESP and Truzo (Kalderos) integration | Assist340B uploads to 340B ESP and Truzo[5][6] |
| 2027 rebate model | Beacon-ready for pharmacy and medical rebate submissions; already submits in-house pharmacy medical claims through Beacon | Command340B: Assist340B automates Beacon rebate submissions; Edge340B processes returned Beacon files[5][6][17] |
| Pricing model | Contingency-based, no true-ups. Rebate module included for Aventi TPA clients. | TPA fees not published; says Advanced Claims Capture charges no fee unless additional claims are captured[6] |
Product names are trademarks of their owners. Spot an error? Email hello@aventihealth.com and we will correct it.
What SunRx provides beyond claims qualification
If you are weighing a switch, note which of these you rely on so nothing falls through the cracks.
Hospital association partnerships
SunRx says it is a corporate partner of 340B Health and is endorsed by state hospital associations as the exclusive 340B administrator for their members, after a review of its technology and services.[1][9]
Pharmacy Department
A dedicated team identifies and enrolls pharmacies, negotiates dispensing fees, handles contracting and answers questions during HRSA registration. Its network includes chain, grocery, mass merchant, independent, specialty and mail order pharmacies.[3]
Uninsured discount card
Staff issue a card through the SunRx system; the contract pharmacy adjudicates the 340B claim in real time, and covered entities can set optional subsidy tiers for low-income and cash-paying patients.[18]
Advanced Claims Capture
Built with AuthorityRx, which SunRx acquired in September 2023. It reviews fallout and outside-referral claims, and SunRx says it works with any TPA and needs no EHR integration.[7][19]
Account team and audits
Each client gets a dedicated account executive or manager, monthly program review calls, help with policies and procedures, and HRSA audit support on request.[10]
Command340B
A 2026 suite covering manufacturer submissions to 340B ESP and Truzo, Beacon rebate submissions, rebate data management, transparency reporting, compliance and a pharmacy gateway.[5]
SunRx and the 340B rebate pilot: a fair read
HRSA's 340B Rebate Model Pilot starts January 1, 2027. Ten manufacturers have approved plans, all using the Beacon platform. Covered entities keep buying selected drugs through their 340B wholesaler account, submit claims data within 45 calendar days of dispense, and manufacturers must pay or deny within 10 calendar days of a complete submission.[16]
Unlike some large TPAs, SunRx has published how it plans to handle Beacon rebate submissions. Its Command340B materials say Assist340B automates Beacon rebate submissions and flags denied rebate attempts for resubmission, and Edge340B processes returned Beacon files and supports dual workflows for traditional discount and rebate contracts.[5][6] SunRx also says Assist340B data can be shared with other 340B TPAs.[6]
Two things are worth checking. First, Command340B is a set of separate modules, and SunRx does not publish whether they are included in TPA fees. Second, SunRx's "Rebate Model Myths — and Facts!" article was written while the earlier rebate model was paused and refers to nine manufacturers,[8] so confirm SunRx's workflow against the ten approved plans HRSA lists now, including medical claims for clinic-administered drugs.[16]
Aventi qualifies rebate claims, submits them to Beacon and reconciles payments in the same system that runs your eligibility, split billing and contract pharmacy claims, and the rebate module is included for Aventi TPA clients. Read about the 340B rebate model, handling rebate denials and rebate reconciliation.
Three paths for SunRx clients
You do not have to decide everything at once. Each path keeps 2027 rebate claims covered.
Keep SunRx, compare rebate options
If SunRx works for you, get its Command340B pricing in writing and compare it with naming Aventi your designated third party for 2027 rebate claims. Contact us for pricing. No TPA switch required.
Run two TPAs during a transition
Move some sites or contract pharmacies to Aventi first, keep others on SunRx, and keep one rebate submission and reconciliation flow across both.
Move your TPA services to Aventi
Bring contract pharmacy and split billing to an independent TPA with contingency-based pricing and no PBM parent. The rebate module is included for Aventi TPA clients.
Switching from SunRx to Aventi: a checklist
Step 2: Export your data from the SunRx portals
Download claims, eligibility settings, accumulators, invoices and reports from the SunRx Covered Entity and Client portals before access ends.[1]
Step 3: Take your CDM-to-NDC crosswalk
SunRx says it builds and maintains the CDM-to-NDC crosswalk for split billing clients. Ask for the current version so your new split billing setup starts from it.[4]
Step 4: Plan the discount card transition
List patients using the SunRx 340B prescription discount card, their subsidy tiers and formulary, and set up the replacement before cards stop working at the pharmacy.[18]
Step 5: Confirm pharmacy contracts and dispensing fees
SunRx's Pharmacy Department negotiates dispensing fees and contracts. Confirm which agreements are between you and each pharmacy, and tell every pharmacy the change date.[3]
Aventi runs onboarding with you and can submit rebate claims while you are still on SunRx. See the demo to walk through it.
SunRx vs Aventi: frequently asked questions
Sources
- SunRx, Who We Are — https://www.sunrx.com/who-we-are
- SunRx, 340B for Patients — https://www.sunrx.com/who-we-serve/patients
- SunRx, Contract Pharmacy — https://www.sunrx.com/what-we-provide/complete-340b-solution/340b-contract-Pharmacy-network
- SunRx, Split Billing Solution — https://www.sunrx.com/what-we-provide/complete-340b-solution/split-billing-solutions
- SunRx, Command340B — https://www.sunrx.com/command340B
- SunRx, Command340B overview and FAQ (PDF, 2026) — https://www.sunrx.com/sites/default/files/2026-02/Command340B-Overview-and-FAQ_Assist-Edge-ACC-Overviews.pdf
- SunRx, "SunRx Acquires AuthorityRx" (September 21, 2023) — https://www.sunrx.com/resources/news/sunrx-acquires-authorityrx
- SunRx, "Rebate Model Myths — and Facts!" — https://www.sunrx.com/resources/industry-insights/rebate-model-myths-and-facts
- SunRx, Business Partners — https://www.sunrx.com/who-we-are/business-partners
- SunRx, Customer Care — https://www.sunrx.com/what-we-provide/complete-340B-solution/customer-service
- MedImpact, Who We Serve — https://www.medimpact.com/clients/who-we-serve
- MedImpact, "MedImpact Completes Acquisition of Sav-Rx" (February 2, 2026) — https://www.medimpact.com/clients/resources/press-releases/medimpact-completes-acquisition-sav-rx
- Insurance Business, "MedImpact adds rebate aggregator in latest PBM acquisition" (November 3, 2026) — https://www.insurancebusinessmag.com/us/news/benefits/medimpact-adds-rebate-aggregator-in-latest-pbm-acquisition-595955.aspx
- Oregon Health Authority, Health Care Market Oversight, MedImpact and Maxor transaction summary (November 3, 2026) — https://www.oregon.gov/oha/HPA/HP/HCMOPageDocs/100-transaction-summary.pdf
- MedImpact, cybersecurity incident website notice (2026) — https://assets.medimpact.com/asset/f995c600-2fce-4d18-ab98-384de1c85b37/MedImpact-Substitute-Notice.pdf
- HRSA, 340B Rebate Model Pilot Program — https://www.hrsa.gov/opa/340b-model-pilot-program
- Aventi Health, 340B Rebate Model — https://aventihealth.com/340b-rebate-model
- SunRx, 340B Prescription Discount Card — https://www.sunrx.com/what-we-provide/complete-340b-solution/uninsured-340B-prescription-discount-card
- SunRx, Advanced Claims Capture — https://www.sunrx.com/what-we-provide/complete-340b-solution/advanced-claims-capture
Accessed November 5, 2026.
Renewing with SunRx? Compare first.
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