Colin D. Weekes, MD
NPI 1043366750ActiveIndividual· Internal Medicine, Medical Oncology· Boston, MA
Internal Medicine, Medical Oncology (MD) with Massachusetts General Physicians Organization Inc and 2 other groups, practicing in Boston, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $117,449 for 166 claims, against $56,268 paid for services in 2024. E.R. Squibb & Sons, L.L.C. was the largest of 4 companies reporting payments in 2025, $15,337 in all, mostly consulting fees. Lists Brigham and Women's Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1043366750 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 26, 2007 |
| Last updated in NPPES | Mar 24, 2026 |
| Certified by provider | Mar 24, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | 269790 | MA |
| Internal Medicine, Medical Oncology | 207RX0202X | 45860 | CO |
| Internal Medicine, Medical Oncology | 207RX0202X | D59858 | MD |
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 - Medical Oncology (MA); Practitioner - Medical Oncology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 177 |
|---|---|
| Services billed | 526 across 13 procedure codes |
| Paid by Medicare | $56,268 |
Part D prescriptions in 2024
| Prescriptions (claims) | 166 · 199 30-day fills |
|---|---|
| Patients | 48 |
| Total drug cost | $117,449 |
| Generic share | 72% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
| Telehealth | Offers telehealth |
Medical groups
- Massachusetts General Physicians Organization IncBoston, MA · 3,558 clinicians
- Brigham and Womens Physicians Organization IncBoston, MA · 2,994 clinicians
- The General Hospital CorporationBoston, MA · 1,267 clinicians
Hospital affiliations
- Brigham and Women's HospitalBoston, MA
- Massachusetts General HospitalBoston, MA
- Newton-Wellesley HospitalNewton, MA
- North Shore Medical Center -Salem, MA
Other facilities
- Mass General Brigham Home Care, IncHome health agency · Newton, MA
- Care Dimensions, IncHospice · Danvers, MA
Industry payments (Open Payments)
- 2025$15,337 · 14 payments from 4 companies
- 2024$6,562 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $15,099 | 11 |
| Histosonics, Inc. | $150.00 | 1 |
| Deciphera Pharmaceuticals Inc. | $44.44 | 1 |
| Astrazeneca Pharmaceuticals LP | $43.25 | 1 |
What the 2025 payments were for
- Consulting Fee$14,726 · 2 payments
- Food and Beverage$485.24 · 9 payments
- Gift$44.44 · 1 payment
- Education$43.25 · 1 payment
- Travel and Lodging$37.74 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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