Jonathan Claus, M.D.
NPI 1184852113ActiveIndividual· Internal Medicine, Infectious Disease· Buffalo, NY
Internal Medicine, Infectious Disease (M.D.) with Erie County Medical Center Corporation and 1 other group, practicing in Buffalo, New York. Their prescriptions cost Medicare Part D more than their services did: $5,384,626 for 4,478 claims, against $23,643 paid for services in 2024. Phathom Pharmaceuticals, Inc. was the largest of 2 companies reporting payments in 2025, $143.36 in all, mostly food and beverage. Lists Bertrand Chaffee Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1184852113 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 29, 2009 |
| Last updated in NPPES | Feb 15, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 277288 | NY |
| Internal Medicine | 207R00000X | 277288 | NY |
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 - Infectious Disease (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 164 |
|---|---|
| Services billed | 241 across 14 procedure codes |
| Paid by Medicare | $23,643 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,478 · 5,528 30-day fills |
|---|---|
| Patients | 329 |
| Total drug cost | $5,384,626 |
| Generic share | 67% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Erie County Medical Center CorporationBuffalo, NY · 319 clinicians
- Academic Medicine Services, Inc.Buffalo, NY · 115 clinicians
Hospital affiliations
- Bertrand Chaffee HospitalSpringville, NY
- Brooks-Tlc Hospital System, IncDunkirk, NY
- Erie County Medical CenterBuffalo, NY
- Kaleida HealthBuffalo, NY
- Olean General HospitalOlean, NY
Other facilities
- Vna of Western Ny ChhaHome health agency · Cheektowaga, NY
Industry payments (Open Payments)
- 2025$143.36 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $129.56 | 1 |
| Astellas Pharma US Inc | $13.80 | 1 |
What the 2025 payments were for
- Food and Beverage$143.36 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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