Christopher G. Tretter, MD
NPI 1083648133ActiveIndividual· Internal Medicine, Hematology & Oncology· South Portland, ME
Internal Medicine, Hematology & Oncology (MD) in South Portland, Maine, trained at McGill University, Faculty of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $803,446 for 565 claims, against $30,340 paid for services in 2024.
Overview
| NPI | 1083648133 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 11, 2006 |
| Last updated in NPPES | Nov 15, 2023 |
| Certified by provider | Nov 13, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 27471 | ME |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 234273 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (MA); Practitioner - Medical Oncology (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 88 |
|---|---|
| Services billed | 369 across 14 procedure codes |
| Paid by Medicare | $30,340 |
Part D prescriptions in 2024
| Prescriptions (claims) | 565 · 652 30-day fills |
|---|---|
| Patients | 112 |
| Total drug cost | $803,446 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | McGill University, Faculty of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- MainehealthPortland, ME · 2,633 clinicians
Hospital affiliations
- Beth Israel Deaconess Medical CenterBoston, MA
- Mainehealth Maine Medical CenterPortland, ME
- Mainehealth Stephens HospitalNorway, ME
- Memorial Hospital, theNorth Conway, NH
Other facilities
- Andwell Health PartnersHospice · Scarborough, ME
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Hematology & Oncology providers in South Portland
- 1194252148
- 1164929451
- 1548828080
- 1073874509
- 1407817406
- 1346731957
- 1689781536
- 1457970436
- 1952862815
- 1427342401
- 1467742403
All Internal Medicine, Hematology & Oncology providers in Maine →