Middlesex Health Primary Care - Cromwell
- Mon 7:45 am - 5:30 pm
- Tue 6:45 am - 7:00 pm
- Wed 6:45 am - 7:00 pm
- Thu 6:45 am - 5:00 pm
- Fri 7:45 am - 5:00 pm
- Sat Not currently available.

Welcome!
Caring. Excellence. Access. Respect.
At Middlesex Health Primary Care - Cromwell, we take family medicine to heart. We provide both scheduled and same-day appointments—as well as Virtual Visits, so you can see a provider from the comfort of your home.
For more information about our services, other locations, our membership in the Mayo Clinic Care Network and much more, click here.
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Your Care Team
Meet the experienced, compassionate providers at Middlesex Health Primary Care - Cromwell!
Our doctors and nurse practitioners are listed below. They are supported by a caring, highly-trained team of nurses, medical assistants, front office staff and others, all dedicated to providing you with the best possible health care experience.

Ryan J. Brenza, DO
Additional Specialties
- Primary Care

Daniela Calle, MSN, FNP
Additional Specialties
- Primary Care

Kristen Donato, DO
Additional Specialties
- Primary Care

Malisa L. Lahtinen, MD
Additional Specialties
- Primary Care

Marguerite Lamb, APRN
Additional Specialties
- Primary Care

S. Jonathan Siegel, MD
Additional Specialties
- Primary Care

Nikolaos Vassiliou, MD
Additional Specialties
- Primary Care

Linda Weiss, DO
Additional Specialties
- Primary Care