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

Dr. Robert Tristian Isom, MD

Individual provider Nephrology Physician · NPI 1356428072

Dr. Robert Tristian Isom, MD is a Nephrology in Portland, Maine. Graduated from Columbia University College of Physicians and Surgeons in 1997, 29 years ago. Practices with Central Coast Nephrology Medical Corporation, an 11-clinician group and accepts Medicare assignment. Licensed in Maine and New York.

Years since qualifying
29
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
ME, NY
In the registry since
2006
Specialties on file
2
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

1600 Congress St Ste B
Portland, ME 04102-2148
Phone: (207) 774-5222
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence MD25822 (ME)
Nephrology Physician Taxonomy 207RN0300X · Licence 217627 (NY)

Record details

NPI number1356428072
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 1, 2006
Last updated in NPPESMay 24, 2022
Certification dateMay 24, 2022

Medicare enrollment

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

Medicare specialtyNEPHROLOGY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 1997 (29 years in practice)
Group practice Central Coast Nephrology Medical Corporation — 11 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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