# Brad Diephuis

> Brad Diephuis is a Boston-based physician, engineer, founder and healthcare operator who became CEO of Thyme Care in September 2026. His career has moved from electrical engineering and computer science to clinical training, the founding and sale of Herald Health, federal payment-model work at the Center for Medicare and Medicaid Innovation, and the operational expansion of Thyme Care from roughly 70 employees and fewer than 2,000 members in 2022 to more than 800 employees and over 125,000 members in 2026.

- **Role:** Chief Executive Officer at Thyme Care
- **Organizations:** Thyme Care, Thyme Companies, Center for Medicare and Medicaid Innovation, Herald Health, Persistent Systems, Brigham and Women's Hospital, Harvard Medical School, Harvard Business School, Harvard University
- **Education:** A.B. in Electrical Engineering and S.M. in Computer Science, Harvard University, M.D., Harvard Medical School, Harvard-MIT Health Sciences and Technology, M.B.A., Harvard Business School, Internal Medicine Residency, Brigham and Women's Hospital
- **Known for:** Co-founded Herald Health and led the company through hospital deployments and its 2018 acquisition by Persistent Systems., Won the 2016 HHS ONC Provider User Experience Challenge with Herald Health., Won the 2016 Harvard i-lab Deans' Health and Life Sciences Challenge grand prize with Herald Health.

## Career timeline

- **2008** — Completed Harvard's accelerated A.B./S.M. program with an undergraduate degree in electrical engineering and a master's degree in computer science in four years.
- **2011** — After work in a medical-device startup and mathematical-modeling research at Massachusetts General Hospital, entered Harvard Medical School.
- **2015** — Co-founded clinical-notification startup Herald Health after a Brigham and Women's Hospital digital innovation hackathon.
- **2016** — Completed a joint M.D./M.B.A. and led Herald Health to the Harvard i-lab Health and Life Sciences grand prize and the HHS ONC Provider User Experience Challenge.
- **2018** — Herald Health was acquired by Persistent Systems; Diephuis later served as an associate vice president in healthcare and life sciences there.
- **2021** — Completed internal medicine residency at Brigham and Women's Hospital and joined the Center for Medicare and Medicaid Innovation as a senior adviser working on total-cost-of-care models.
- **2022** — Joined Thyme Care as chief business officer when the company had about 70 employees, two payer contracts and fewer than 2,000 members.
- **2024** — Moved into the role of president and chief operating officer, with responsibility across operations and partner growth.
- **2026** — Became CEO of Thyme Care effective September 1 as the company surpassed 800 employees and 125,000 members.
- **2026** — Led Thyme Care into its post-Series E phase after a financing of more than $125 million at a valuation above $2 billion and the formation of parent entity Thyme Companies.

## Achievements

- Co-founded Herald Health and led the company through hospital deployments and its 2018 acquisition by Persistent Systems.
- Won the 2016 HHS ONC Provider User Experience Challenge with Herald Health.
- Won the 2016 Harvard i-lab Deans' Health and Life Sciences Challenge grand prize with Herald Health.
- Was named among MedTech Boston's 40 Under 40 Health Care Innovators.
- Co-authored 14 peer-reviewed papers on subjects ranging from predictive models to software design, according to his General Assembly biography.
- Helped Thyme Care expand from two payer contracts and fewer than 2,000 members in 2022 to 14 clients and more than 125,000 members in 2026.
- Became CEO of Thyme Care effective September 1, 2026.

## Latest updates

- **2026-09** — Thyme Care announced a Series E financing of more than $125 million at a valuation above $2 billion and established Thyme Companies; Diephuis continues as CEO of the core Thyme Care business.
- **2026-09** — Diephuis officially began serving as chief executive officer of Thyme Care on September 1.
- **2026-08** — In a MobiHealthNews interview, he said Thyme Care had grown to 14 clients, more than 125,000 members and over 800 employees.
- **2026-07** — Thyme Care announced that Diephuis would succeed co-founder Robin Shah, who moved into the executive-chairman role.

## Links

- Website: https://thymecare.com
- LinkedIn: https://www.linkedin.com/in/bdiephuis

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Profile page: https://yespress.io/brad-diephuis
Published by YesPress — https://yespress.io
Last updated: 2026-09-27