Brian Paul Riff, MD
NPI 1194969030ActiveIndividual· Internal Medicine, Gastroenterology· Anaheim, CA
Internal Medicine, Gastroenterology (MD) in Anaheim, California, trained at Jefferson Medical College of Thomas Jefferson University (class of 2009). In 2024 Medicare paid $517,763 for 552 patients, and Part D covered 1,779 of their prescriptions, 76% of them generic. Phathom Pharmaceuticals, Inc. was the largest of 19 companies reporting payments in 2025, $18,072 in all, mostly speaking and faculty fees.
Overview
| NPI | 1194969030 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 22, 2009 |
| Last updated in NPPES | Apr 17, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A143535 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 552 |
|---|---|
| Services billed | 32,370 across 65 procedure codes |
| Paid by Medicare | $517,763 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,779 · 2,910 30-day fills |
|---|---|
| Patients | 527 |
| Total drug cost | $653,777 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | Jefferson Medical College of Thomas Jefferson University |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Associated Gastroenterology Medical GroupAnaheim, CA · 6 clinicians
Hospital affiliations
- Ahmc Anaheim Regional Medical CenterAnaheim, CA
- Foothill Regional Medical CenterTustin, CA
- Orange County Global Medical CenterSanta Ana, CA
- Providence St. Jude Medical CenterFullerton, CA
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$18,072 · 149 payments from 19 companies
- 2024$45,218 · 151 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $11,761 | 20 |
| Olympus Medical Systems Corporation | $3,000 | 3 |
| Medtronic, Inc. | $952.75 | 6 |
| Abbvie Inc. | $678.37 | 54 |
| Pfizer Inc. | $263.98 | 13 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$11,000 · 5 payments
- Food and Beverage$2,948 · 130 payments
- Consulting Fee$2,571 · 2 payments
- Travel and Lodging$1,552 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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