As pharmacies expand into offering immunizations and other clinical services, the rules for the Part B medical side have moved away from the traditional pharmacy side.
For years, community pharmacies have operated with a comfortable assumption. They believed that being in-network with their pharmacy benefits manager (PBM) for dispensing medications meant their business was fully covered. In 2026, that assumption is no longer safe.
As pharmacies expand to offer immunizations and other clinical services, the rules for the Part B medical side have moved away from those for the traditional pharmacy side. This is more than just a paperwork delay; it is a financial hurdle. Without the right medical credentialing, a pharmacy risks providing these services and never receiving the reimbursement. We need to stop looking at this through a PBM contract and start addressing the specific medical-side requirements.
A major point of confusion in pharmacy is the belief that PBM enrollment is a universal key. The reality is that pharmaceutical and medical credentialing are 2 separate systems.1 Most insurance companies keep these processes isolated from each other. It is very common for a pharmacy to be fully set up to bill medications for a commercial payer but remain completely uncredentialed on the medical side for that same company. This creates a silent payment gap. You may not notice the problem until you submit a claim for an immunization and receive a denial instead of a payment. To make matters worse, some payers have begun blocking pharmacies from rebilling after a medical denial has been issued.
The role of the pharmacist has grown far beyond simply dispensing medication. You are now a recognized clinical center for your community, providing immunizations and patient counseling for chronic conditions. Patients value this integrated access, but it only works if insurance reimbursement follows the service. During the pandemic, government mandates often bypassed credentialing hurdles to ensure the public had access to care. Those mandates have ended, and insurance companies have returned to their strict rules for the medical side. The federal government is aware of this administrative burden.2 One of the most disruptive changes in 2026 is the return of a model where some major insurance companies send the reimbursement check directly to the patient instead of the pharmacy.3
When a patient receives an immunization check in the mail, they almost always mistake it for a rebate or a refund. While you can legally bill the patient for this cost, doing so turns your pharmacy into a collection agency. This hurts the trust you have built with your patients and creates an unnecessary administrative burden for your staff. This shift has created a crisis for many providers who have not secured recognition as medical providers.
Annie Tomsik is the director of operations for PACCS. With extensive experience in pharmacy administrative services and medical credentialing for both pharmacy and durable medical equipment (DME) providers, she and the team at PACCS specialize in helping community pharmacies navigate the complex requirements of Part B and medical service reimbursement.
There is a significant difference between just surviving and actually thriving in 2026. For many, the PBM remains the main focus, but the real opportunities for growth lie on the medical and Part B sides. Relying only on PBM contracts is a survival strategy that leaves your pharmacy vulnerable to payment traps. Thriving requires an investment in your complete credentialing portfolio, moving beyond just dispensing medications to becoming a fully networked medical provider.
Navigating this environment is a specialized task, and it is very different from processing a daily medication claim. For pharmacies handling this work internally, the specific medical requirements can be confusing and full of potential errors. If your pharmacy does not have the extra staff or the specialized knowledge to manage this continuous process, finding a trusted partner is a vital investment. Having access to up-to-date knowledge ensures your pharmacy remains compliant and fully networked across all payers. This allows you to get back to serving your patients while ensuring your business is positioned to capture every payment you have earned.
