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Adult Primary Care (Internal Medicine)

E23-Two East, Two Administration, Two West, Three West, Lexington

Schedule Appointments
M–F, 8:30 a.m. to 5 p.m.

Please phone providers directly at numbers listed below.

MIT Medical/Lexington:
Phone: 781-981-7080

Referral Requirement

Urgent Care
Urgent Care (first floor) is open 7 a.m.–11 p.m. seven days a week. At night, call 617-253-4481 for medical advice. Always call before bringing in a pediatrics patient to find out if a pediatric clinician is available.


Your primary care provider is your first contact and resource when it comes to taking care of your health. All of our adult primary care providers are internal medicine or family practice specialists who work collaboratively with a team of registered nurses, nurse practitioners, physician assistants, and clinical assistants to cover your personal health concerns. All the members of our primary care team stress prevention and education while providing a full range of services for students, employees, faculty, and family members that includes:

Making an Appointment

Call your primary care provider’s office directly to make an appointment. If you don't have a primary care provider, please call MIT Medical's main number at 617-253-4481, Monday–Friday, 8:30 a.m. to 5 p.m., and they will help you make an appointment. If you require TTY service, please use 617-258-0656.

Care Providers

Primary care providers are available to anyone who's eligible for MIT Medical services. Adolescent primary care providers are available to young people, typically under the age of 25.

Marie Caggiano, M.D.
Amy Chilton, R.N.
Allison Daly, F.N.P.-C., M.S.N.
David V. Diamond, M.D.
Maureen Dobrowsky, RN FNP-BC
H. Carroll Eastman, MD
Austin Patrick Egan, MD
Shawn M. Ferullo, M.D.
Leigh M. Firn, M.D.
Lisa Hebda, R.N.
Howard M. Heller, M.D., M.P.H.
Maureen Johnston, NP
Michael A. Kane, M.D.
Amelia Leutz, RN, BSN
Janet R. Lorang, M.S.N., F.N.P.
Brian D. Marriott, M.D.
Colleen McDonald, M.S.N., F.N.P.-B.C.
Barbara L. O'Pray, M.D.
Noemi M. Pedraza, M.D., F.A.C.C.
William A. Ruth, M.D.
Veronique Saint Clair, B.S.N., R.N.
Jessica Senesi, A.N.P.-B.C.
Stephanie Shapiro, M.D.
Elaine L. Shiang, M.D.
Toby Walters, R.N.

For Adults

Marie Caggiano, M.D.* 617-253-7257
Allison Daly, F.N.P.-C. * 617-258-5384
David V. Diamond, M.D. 617-253-7625
Maureen Dobrowsky, F.N.P. * 617-253-7621
H. Carroll Eastman, M.D.* 617-253-7824
Austin Egan, M.D.* 617-253-0811
Shawn M. Ferullo, M.D. 617-253-0581
Leigh M. Firn, M.D. 617-253-4909
Howard M. Heller, M.D. 617-253-1615
Maureen Johnston, N.P. 617-253-7825
Michael A. Kane, M.D. 617-253-7825
William M. Kettyle, M.D. 617-253-1716
Janet Lorang, M.S.N., F.N.P.* (Lexington only) 781-981-7080
Brian D. Marriott, M.D.* (Lexington only) 781-981-7080
Colleen McDonald, F.N.P.-B.C.* 617-253-0518
Barbara L. O'Pray, M.D.* (up to age 25) 617-253-7448
William A. Ruth, M.D.* 617-253-1321
Jessica Senesi, A.N.P.-B.C.* 617-253-4496
Stephanie Shapiro, M.D. 617-253-0883
Elaine L. Shiang, M.D. 617-253-7915

* primary care providers and nurse practitioners accepting new patients


For Adolescents and Young Adults

Pat Bartels, F.N.P.-B.C.
accepting new patients under age 15
Ingrid Henar, M.D.
accepting new patients under age 18
Cambridge pediatric appointments and office: 617-253-1505
Cambridge adolescent appointments and office: 617-253-7803
Jocelyn O. Joseph, M.D.
accepting new patients under age 18
Cambridge pediatric (under age 14) appointments and office: 617-253-1505
Cambridge adolescent (ages 14-17) appointments and office: 617-253-7803.
Janet Lorang, M.S.N., F.N.P.
accepting new patients of all ages, Lexington only
Brian Marriott, M.D.
accepting new patients of all ages, Lexington only
Sara Oh Neville, M.D.
patients under age 22
Barbara L. O'Pray, M.D.
accepting new patients age 10-25
Amy Zisa, M.D.
accepting new patients under age 18


Nursing Staff

Amy Chilton, R.N. (triage) 617-253-9465
Lisa Hebda, R.N. (triage) 617-324-1861
Veronique Saint Clair, B.S.N., R.N. (triage) 617-253-4516


Related Links

How do I choose a primary care provider?
Urgent Care

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