Doctor profile · Federal record
Dr. Tan Nguyen, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Garden Grove, CA
- NPI 1609839299
- Accepts Medicare
- MIPS 16.6 / 100 · 2023
- 38 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 4 locations .
- Primary practice
-
12865 Main St Ste 105
Garden Grove, CA 928408205
(800) 768-1977
fax (800) 768-1977 - Additional location
-
508 S Brookhurst St
Anaheim, CA 92804
(800) 760-5520
fax (800) 760-5520 - Additional location
-
7514 Girard Ave, Suite 4
La Jolla, CA 920375149
(858) 754-1114
fax (858) 228-9828 - Additional location
-
8700 Warner Ave Ste 270
Fountain Valley, CA 927083212
(800) 560-9999
fax (800) 391-4191
Show 1 more location
Credentials & registration
- NPI registered
- April 2006 — 20 yrs on file
- Profile last updated
- July 22, 2021
- Year of graduation
- 1988 — 38 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G67119
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1609839299. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
128
Distinct HCPCS
2
Medicare allowed
$7,137
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99457 |
Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | 68 | 12 | $53 | |
99454 |
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | 60 | 11 | $58 |
In context: peer comparison
Among 16 peers in this city , average services per provider: 257. This provider delivers 0.5× the peer median.Open Payments
Industry payments received
All-time total
$21
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 1 | $21.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,274
Patients
209
Total drug cost
$21,621
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 216 | 36 | $4,641 |
| Amlodipine Besylate | Generic | 169 | 29 | $1,822 |
| Gabapentin | Generic | 109 | 15 | $1,931 |
| Metformin Hcl | Generic | 96 | 17 | $1,128 |
| Tamsulosin Hcl | Generic | 89 | 17 | $2,166 |
| Losartan Potassium | Generic | 83 | 22 | $1,381 |
| Metoprolol Succinate | Generic | 70 | 12 | $1,260 |
| Famotidine | Generic | 67 | 16 | $1,182 |
| Mirtazapine | Generic | 59 | 0 | $1,122 |
| Finasteride | Generic | 56 | 0 | $1,139 |
Frequently asked questions
What is Dr. Tan Nguyen's medical specialty?
Dr. Tan Nguyen practices Internal Medicine Physician in Garden Grove, CA.
Where does Dr. Tan Nguyen practice?
Dr. Tan Nguyen practices at 12865 Main St Ste 105, Garden Grove, CA 928408205. Office phone: 8007681977.
What is Dr. Tan Nguyen's NPI?
Dr. Tan Nguyen's National Provider Identifier (NPI) is 1609839299, issued by NPPES.
Does Dr. Tan Nguyen accept Medicare assignment?
Yes. Dr. Tan Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Tan Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Management using the results of remote vital sign monitoring per calendar month (HCPCS 99457); Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days (HCPCS 99454). Source: CMS Medicare Physician & Other Practitioners file.