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

Dr. Christopher G Tretter, MD

Individual provider Hematology & Oncology Physician · NPI 1083648133

Dr. Christopher G Tretter, MD is a Medical Oncology in South Portland, Maine. Graduated from McGill University, Faculty of Medicine in 1994, 32 years ago. Practices with Mainehealth, a 2,615-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts and Maine.

Years since qualifying
32
Trained at
McGill University, Faculty of Medicine
Licensed in
MA, ME
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.

See every abbreviation used in this directory →

Practice location Partly verified

Some contact details are missing from the federal record.

Mainehealth Cancer Care 265 Western Ave Ste 2
South Portland, ME 04106
Phone: (207) 661-0200
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Hematology & Oncology Physician (primary) Taxonomy 207RH0003X · Licence 27471 (ME)
Hematology & Oncology Physician Taxonomy 207RH0003X · Licence 234273 (MA)

Record details

NPI number1083648133
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 11, 2006
Last updated in NPPESNovember 15, 2023
Certification dateNovember 13, 2023

Medicare enrollment

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

Medicare specialtyMEDICAL ONCOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolMCGILL UNIVERSITY, FACULTY OF MEDICINE
Graduated 1994 (32 years in practice)
Group practice Mainehealth — 2615 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

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