Doctor profile · Federal record
Dr. Tam Nguyen, D.O.
Internal Medicine Physician (CMS: Internal Medicine) · Marysville, CA
- NPI 1841200854
- Accepts Medicare
- 28 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
414 G St, #110
Marysville, CA 959015663
(530) 741-2393
fax (530) 741-2396 - Mailing address
-
1800 Harrison St 7Th Fl
Oakland, CA 946123466
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- February 11, 2022
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #20A8322
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1841200854. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$38
Transactions
2
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Sumitomo Pharma America, Inc. | 2 | $38.44 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
3,749
Patients
1,151
Total drug cost
$57,968
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 562 | 178 | $7,829 |
| Amlodipine Besylate | Generic | 409 | 134 | $5,009 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 402 | 61 | $6,639 |
| Levothyroxine Sodium | Generic | 358 | 107 | $7,899 |
| Lisinopril | Generic | 327 | 114 | $4,210 |
| Losartan Potassium | Generic | 226 | 79 | $2,879 |
| Gabapentin | Generic | 199 | 64 | $6,118 |
| Atenolol | Generic | 173 | 54 | $2,135 |
| Tamsulosin Hcl | Generic | 171 | 54 | $3,454 |
| Fluticasone Propionate | Generic | 165 | 54 | $2,346 |
Frequently asked questions
What is Dr. Tam Nguyen's medical specialty?
Dr. Tam Nguyen practices Internal Medicine Physician in Marysville, CA.
Where does Dr. Tam Nguyen practice?
Dr. Tam Nguyen practices at 414 G St, Marysville, CA 959015663. Office phone: 5307412393.
What is Dr. Tam Nguyen's NPI?
Dr. Tam Nguyen's National Provider Identifier (NPI) is 1841200854, issued by NPPES.
Does Dr. Tam Nguyen accept Medicare assignment?
Yes. Dr. Tam Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.