Diplomat Specialty Pharmacy® and Diplomat Specialty Infusion Group® are joining the Optum® family.

To learn more about what this means for you, visit our FAQ pages:

Specialty Pharmacy FAQ  •  Infusion Pharmacy FAQ

Explore our history.

We serve one patient at a time — always.

For more than 40 years, Diplomat has helped patients through their treatment experience. Explore some of our milestones along the way.


1975: Opening Diplomat

Dale Hagerman and his son Phil start the first branch of Diplomat Pharmacy. Their motto: “Take good care of patients and the rest falls into place.”

1995: Taking a Stand

Diplomat removes all tobacco products from its stores. Other pharmacies wouldn’t do so for decades.

2001: Specialty Pharmacy

Diplomat completes its transition into specialty dispensing. Having started as a traditional pharmacy, we went national and formalized specialty as our primary focus.

2010: Growing Greater

Diplomat moves its headquarters to a former General Motors facility in Flint, Michigan. Our focus: creating jobs in a town where we could make an impact, with a workforce ready to learn.

2014: Going Public

Diplomat becomes a public company, traded under the symbol “DPLO.” Going public gave us the resources to expand our vision for the impact we could make.

2016: Adding Infusion Expertise

Diplomat Specialty Infusion Group launches.

After several complementary acquisitions, Diplomat can deliver better care to people who need infused therapies.

Get personalized care anywhere.

We serve people in all U.S. states and territories.

Diplomat Specialty Pharmacy helps patients and providers with oral and injectable medications you can’t find at most drugstores. Diplomat Specialty Infusion Group serves people whose treatments are infused or delivered straight into the bloodstream.

caregiver and patient

Here to Improve Lives

Whether you’re taking an oral, injected, or infused medication, we’re here to help you and your loved ones.

Our mission: At Diplomat, we blend clinical excellence with a personal touch — for happier lives and health that lasts.

Our philosophy: “Take good care of patients and the rest falls into place.”
— Dale Hagerman, Diplomat cofounder

To us, achieving excellence means giving patients their best chance for happier lives — lives with more moments, more milestones, more memories in the making. The result isn’t just an outcome: It’s an impact. That’s why we commit to helping one patient at a time.

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