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

John A Gelzhiser, MD

Individual provider Internal Medicine Physician · NPI 1013100759

John A Gelzhiser, MD is an Internal Medicine in Warwick, Rhode Island. Qualified in 2004, 22 years ago. Practices with Affinity Physicians LLC, a 734-clinician group and accepts Medicare assignment. Licensed in Rhode Island.

Years since qualifying
22
Licensed in
RI
In the registry since
2007
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

455 Toll Gate Rd
Warwick, RI 02886-2759
Phone: (401) 737-7000
Fax: (401) 736-4265
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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 PENDING (RI)

Record details

NPI number1013100759
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 27, 2007
Last updated in NPPESAugust 27, 2007
Mailing address455 Toll Gate Rd, Warwick, RI 02886-2759

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Affinity Physicians Llc. — 734 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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