Marshall Rob Chamberlin, MD
NPI 1003044488ActiveIndividual· Internal Medicine· Scarborough, ME
Internal Medicine (MD) in Scarborough, Maine, trained at Boston University School of Medicine (class of 2009). Their prescriptions cost Medicare Part D more than their services did: $63,162 for 642 claims, against $3,646 paid for services in 2024.
Overview
| NPI | 1003044488 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 24, 2009 |
| Last updated in NPPES | Mar 30, 2020 |
| Certified by provider | Mar 30, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MD20716 | ME |
| Hospitalist | 208M00000X | MD20716 | ME |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 30 |
|---|---|
| Services billed | 98 across 8 procedure codes |
| Paid by Medicare | $3,646 |
Part D prescriptions in 2024
| Prescriptions (claims) | 642 · 1,323 30-day fills |
|---|---|
| Patients | 93 |
| Total drug cost | $63,162 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Internal Medicine |
Medical group
- MainehealthPortland, ME · 2,633 clinicians
Hospital affiliation
- Mainehealth Maine Medical CenterPortland, ME
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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