Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Katherine A Hollister, MD

Individual provider Internal Medicine Physician · NPI 1386083962

Katherine A Hollister, MD is an Internal Medicine in Portsmouth, New Hampshire. Graduated from Pennsylvania State University College of Medicine in 1996, 30 years ago. Practices with Greater Seacoast Community Health, a 37-clinician group and accepts Medicare assignment. Licensed in New Hampshire.

Years since qualifying
30
Trained at
Pennsylvania State University College of Medicine
Licensed in
NH
In the registry since
2013
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

100 Campus Dr Ste 12
Portsmouth, NH 03801-5892
Phone: (603) 422-8208
Fax: (603) 422-8218
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 12107 (NH)

Record details

NPI number1386083962
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 18, 2013
Last updated in NPPESJuly 23, 2013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolPENNSYLVANIA STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated 1996 (30 years in practice)
Group practice Greater Seacoast Community Health — 37 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Portsmouth