Thalia Mayes, M.D.
NPI 1033126826ActiveIndividual· Internal Medicine, Gastroenterology· Portland, ME
Internal Medicine, Gastroenterology (M.D.) in Portland, Maine, trained at University of Rochester School of Medicine and Dentistry (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $829,197 for 459 claims, against $211,291 paid for services in 2024. Fujifilm Healthcare Americas Corporation reported $221.33 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1033126826 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 2, 2006 |
| Last updated in NPPES | Sep 8, 2022 |
| Certified by provider | Sep 8, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 017618 | 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 - Gastroenterology (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 236 |
|---|---|
| Services billed | 9,270 across 36 procedure codes |
| Paid by Medicare | $211,291 |
Part D prescriptions in 2024
| Prescriptions (claims) | 459 · 832 30-day fills |
|---|---|
| Patients | 190 |
| Total drug cost | $829,197 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | University of Rochester School of Medicine and Dentistry |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
Medical group
- Portland Gastroenterology Associates PAPortland, ME · 22 clinicians
Hospital affiliations
- Mainehealth Maine Medical CenterPortland, ME
- Memorial Hospital, theNorth Conway, NH
- Northern Light Mercy HospitalPortland, ME
Industry payments (Open Payments)
- 2025$221.33 · 4 payments from 1 company
- 2024$86.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Fujifilm Healthcare Americas Corporation | $221.33 | 4 |
What the 2025 payments were for
- Food and Beverage$221.33 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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