Dat Tien Nguyen, MD
NPI 1659346435ActiveIndividual· Specialist· Modesto, CA
Specialist (MD) in Modesto, California, trained at University of Minnesota Medical School (class of 1990). Part D covered 171 prescriptions written in 2024, 100% of them generic. A record with the same name and state is on the OIG exclusion list; it carries no NPI, so check it before acting.
Overview
| NPI | 1659346435 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 23, 2006 |
| Last updated in NPPES | Jan 10, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | G75447 | CA |
Exclusion screening
Possible match: verify before acting. The OIG list has a record with the same name in California, but that record carries no NPI, so it may be a different person or business.
| Matched by | Name on OIG list | Exclusion type | Excluded since | Location |
|---|---|---|---|---|
| Name + state | Dat Tat Nguyen · Business Manager | 1128a1 | Jul 20, 1999 | San Diego, CA |
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | Possible (name) | See above |
| 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 - Colorectal Surgery (Proctology) (CA) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 171 · 171 30-day fills |
|---|---|
| Patients | 58 |
| Total drug cost | $1,736 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Minnesota Medical School |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Colorectal Surgery (Proctology) |
| Secondary specialties | General Surgery, Surgical Oncology |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Hospital affiliation
- Kaiser Foundation Hospital MantecaManteca, CA
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