Frederick W. Ruymann, MD
NPI 1568466316ActiveIndividual· Internal Medicine, Gastroenterology· Cambridge, MA
Internal Medicine, Gastroenterology (MD) in Cambridge, Massachusetts, trained at Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University (class of 1987). In 2024 Medicare paid $135,641 for 747 patients, and Part D covered 213 of their prescriptions, 77% of them generic. Abbvie Inc. was the largest of 14 companies reporting payments in 2025, $1,582 in all, mostly food and beverage.
Overview
| NPI | 1568466316 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 9, 2005 |
| Last updated in NPPES | Jan 11, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 71422 | 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 - Gastroenterology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 747 |
|---|---|
| Services billed | 1,206 across 50 procedure codes |
| Paid by Medicare | $135,641 |
Part D prescriptions in 2024
| Prescriptions (claims) | 213 · 346 30-day fills |
|---|---|
| Patients | 99 |
| Total drug cost | $151,209 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | Clvlnd Clinic Lerner College of Med of Case Wstn Rsv University |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Medical Affiliates of Cape Cod IncHyannis, MA · 229 clinicians
Hospital affiliations
- Cape Cod HospitalHyannis, MA
- Falmouth HospitalFalmouth, MA
Industry payments (Open Payments)
- 2025$1,582 · 67 payments from 14 companies
- 2024$1,861 · 67 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $518.43 | 24 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $285.47 | 12 |
| Aimmune Therapeutics, Inc. | $252.89 | 10 |
| Janssen Biotech, Inc. | $156.93 | 3 |
| Takeda Pharmaceuticals U.S.A., Inc. | $102.68 | 5 |
What the 2025 payments were for
- Food and Beverage$1,582 · 67 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 23 gastroenterologists in Cambridge · All gastroenterologists in Massachusetts