Tanya Hoa Dam, DO
NPI 1104105030ActiveIndividual· Internal Medicine, Gastroenterology· Modesto, CA
Internal Medicine, Gastroenterology (DO) with First Choice Physician Partners, practicing in Modesto, California. Their prescriptions cost Medicare Part D more than their services did: $788,732 for 921 claims, against $78,872 paid for services in 2024. Janssen Biotech, Inc. was the largest of 3 companies reporting payments in 2025, $148.24 in all, mostly food and beverage. Lists Adventist Health Sonora and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1104105030 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | Yes |
| NPI issued | Aug 9, 2011 |
| Last updated in NPPES | Aug 8, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 20A12410 | 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 | 381 |
|---|---|
| Services billed | 797 across 51 procedure codes |
| Paid by Medicare | $78,872 |
Part D prescriptions in 2024
| Prescriptions (claims) | 921 · 1,362 30-day fills |
|---|---|
| Patients | 349 |
| Total drug cost | $788,732 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- First Choice Physician PartnersPalm Springs, CA · 127 clinicians
Hospital affiliations
- Adventist Health SonoraSonora, CA
- Doctors Medical CenterModesto, CA
- Emanuel Medical CenterTurlock, CA
- Memorial Medical CenterModesto, CA
Industry payments (Open Payments)
- 2025$148.24 · 5 payments from 3 companies
- 2024$156.00 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $88.50 | 3 |
| Boston Scientific Corporation | $33.88 | 1 |
| Abbvie Inc. | $25.86 | 1 |
What the 2025 payments were for
- Food and Beverage$148.24 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 gastroenterologists in Modesto · All gastroenterologists in California