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Meet Our Team

Our physicians work collaboratively, combining decades of experience to provide thoughtful, coordinated care for every member.

Kate Isselbacher

Kate IsselbacherMD

MEDICAL DIRECTOR AND FOUNDER

Dr. Kate Isselbacher graduated with honors from Harvard University, earning an A.B. Degree in 1981. Subsequently, she obtained her…

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Nancy Haff

Nancy HaffMD MPH

ASSISTANT PROFESSOR OF MEDICINE, HARVARD MEDICAL SCHOOL

Dr. Nancy Haff earned her medical degree from the Perelman School of Medicine at the University of Pennsylvania, where she was…

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Daniel Gaposchkin

Daniel GaposchkinMD PhD

CLINICAL ASSOCIATE OF MEDICINE, HARVARD MEDICAL SCHOOL

Dr. Daniel Gaposchkin earned his Bachelor of Arts in Biology from the University of California, Berkeley. He then completed both his Master of Arts in Medical…

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Kevin Heaton

Kevin HeatonMD

CLINICAL INSTRUCTOR OF MEDICINE HARVARD MEDICAL SCHOOL

Dr. Kevin Heaton graduated from Columbia University’s post-baccalaureate premedical program. He then earned his medical degree from…

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Christine M

Christine M. HarringtonMD

INTERNAL MEDICINE SPECIALIST

Dr. Christine Harrington graduated Magna Cum Laude from Brown University with a B.A. in Cognitive Science. She earned her medical…

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Li Tso

Li TsoMD

ASSISTANT PROFESSOR OF MEDICINE HARVARD MEDICAL SCHOOL

Dr. Li Tso is an experienced physician and Assistant Professor of Medicine at Harvard Medical School with nearly 30 years of clinical practice at…

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Julie Coffey

Julie CoffeyANP-C

Nurse Practitioner

Julie Coffey is a nurse practitioner at Exceptional Health who brings extensive experience in primary care and a calm, attentive…

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Amanda Perillo

Amanda PerilloPA-C

PHYSICIAN ASSISTANT

Amanda “Anoele” Perillo is a physician assistant at Exceptional Health who works closely with the practice’s physicians to support continuity,…

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Our Exceptional Office Staff

Our office staff are highly trained professionals who ensure every aspect of your experience runs smoothly, from scheduling and referrals to follow up care and insurance coordination.

Brian Isselbacher

Brian Isselbacher

CHIEF OPERATING OFFICER
Luke Cogswell

Luke Cogswell

PATIENT CARE DIRECTOR
Cady Taft

Cady Taft

MEMBERSHIP DIRECTOR
Mason McDermid

Mason McDermid

MARKETING DIRECTOR
Mat Brockelman

Mat Brockelman

PATIENT COORDINATOR
Sarah Wozniak

Sarah Wozniak

PATIENT COORDINATOR
Guy Grant Headshot 1

Guy Grant

PATIENT COORDINATOR
Stephanie Erickson

Stephanie Erickson

PATIENT COORDINATOR
Anthony Stempien

Anthony Stempien

PATIENT COORDINATOR
Kathryn O’Connor

Kathryn O’Connor

MEDICAL ASSISTANT
Dillyn Zindler

Dillyn Zindler

MEDICAL ASSISTANT
Cody Ciesielski

Cody Ciesielski

MEDICAL ASSISTANT
Heather Gary

Heather Gary

MEDICAL ASSISTANT
Jenna Aubuchon

Jenna Aubuchon

Medical Assistant
Kerry Howeson

Kerry Howeson

Medical Assistant

Hospital Affiliations

Exceptional Health partners with a trusted network of leading hospitals and specialists, giving patients streamlined access to expert care when they need it most.

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Exceptional Health
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Exceptional Health

Your Health Deserves This Level of Attention.

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