Dat Tan Huynh, M.D.
NPI 1033298963ActiveIndividual· Internal Medicine· San Jose, CA
Internal Medicine (M.D.) with One Health Medical Foundation, practicing in San Jose, California. Their prescriptions cost Medicare Part D more than their services did: $1,266,096 for 9,202 claims, against $112,541 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 12 companies reporting payments in 2025, $1,583 in all, mostly food and beverage.
Overview
| NPI | 1033298963 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Nov 2, 2006 |
| Last updated in NPPES | Aug 20, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A500710 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 160 |
|---|---|
| Services billed | 1,913 across 28 procedure codes |
| Paid by Medicare | $112,541 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,202 · 21,042 30-day fills |
|---|---|
| Patients | 432 |
| Total drug cost | $1,266,096 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 1970 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- One Health Medical FoundationSan Jose, CA · 12 clinicians
Other facilities
- Ace Home Health Care & Hospice, IncHome health agency · Orinda, CA
Industry payments (Open Payments)
- 2025$1,583 · 24 payments from 12 companies
- 2024$2,331 · 54 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $373.49 | 3 |
| Novo Nordisk Inc | $249.95 | 2 |
| Lilly USA, LLC | $209.27 | 4 |
| Aimmune Therapeutics, Inc. | $152.10 | 2 |
| Gilead Sciences, Inc. | $150.00 | 1 |
What the 2025 payments were for
- Food and Beverage$1,583 · 24 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in San Jose
- 1982890018
- 1487467601
- 1245263458
- 1760562748
- 1043476393
- 1760282990
- 1619436128
- 1336678143
- 1447967922
- 1740597368
- 1467775866
- 1114447836