Meet Our Team

Exceptional Health’s physicians and care team deliver concierge internal medicine with the access, continuity, and personalized attention every patient deserves.

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

Kate Isselbacher MD

Medical Director and Founder

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

Nancy Haff MD 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…

Daniel Gaposchkin MD 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…

Kevin Heaton MD

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…

Christine M. Harrington MD

Internal Medicine Specialist

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

Li Tso MD

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…

Julie Coffey ANP-C

Nurse Practitioner

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

Amanda Perillo PA-C

Physician Assistant

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

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

CHIEF OPERATING OFFICER

Luke Cogswell

PATIENT CARE DIRECTOR

Cady Taft

MEMBERSHIP DIRECTOR

Mason McDermid

MARKETING COORDINATOR

Alix Wozniak

Practice Operations Associate

Mat Brockelman

PATIENT COORDINATOR

Sarah Wozniak

PATIENT COORDINATOR

Guy Grant

PATIENT COORDINATOR

Stephanie Erickson

PATIENT COORDINATOR

Anthony Stempien

PATIENT COORDINATOR

Kathryn O’Connor

MEDICAL ASSISTANT

Dillyn Zindler

MEDICAL ASSISTANT

Cody Ciesielski

MEDICAL ASSISTANT

Heather Gary

MEDICAL ASSISTANT

Jenna Aubuchon

Medical Assistant

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.