Doctor profile · Federal record
Dr. Vivian Nguyen, MD
Internal Medicine Physician (CMS: Hospitalist) · Internal Medicine Physician · Internal Medicine Physician · Westminster, CA
- NPI 1689869570
- Accepts Medicare
- 22 yrs in practice
- Licensed in 3 states
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
8419 Westminster Blvd
Westminster, CA 926833308
(714) 248-9558
fax (714) 248-9740
Credentials & registration
- NPI registered
- September 2007 — 19 yrs on file
- Profile last updated
- May 18, 2023
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (3)
- California #A102097 · New York #249741 · Georgia #TL001670
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1689869570. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
781
Distinct HCPCS
5
Medicare allowed
$97,435
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 626 | 181 | $122 | |
99239 |
Hospital discharge day management, more than 30 minutes | 98 | 96 | $117 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 26 | 25 | $180 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 20 | 11 | $140 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 11 | 11 | $181 |
In context: peer comparison
Among 13 peers in this city , average services per provider: 331. This provider delivers 2.4× the peer median.Open Payments
Industry payments received
All-time total
$22
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 1 | $22.01 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
212
Patients
88
Total drug cost
$13,511
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 33 | 15 | $497 |
| Levofloxacin | Generic | 32 | 31 | $127 |
| Pantoprazole Sodium | Generic | 23 | 13 | $289 |
| Carvedilol | Generic | 20 | 0 | $142 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 16 | 15 | $117 |
| Azithromycin | Generic | 14 | 14 | $84 |
| Losartan Potassium | Generic | 14 | 0 | $145 |
| Levocetirizine Dihydrochloride | Generic | 13 | 0 | $77 |
| Metformin Hcl | Generic | 13 | 0 | $111 |
| Amlodipine Besylate | Generic | 12 | 0 | $45 |
Hospital affiliations
Frequently asked questions
What is Dr. Vivian Nguyen's medical specialty?
Dr. Vivian Nguyen practices Internal Medicine Physician in Westminster, CA.
Where does Dr. Vivian Nguyen practice?
Dr. Vivian Nguyen practices at 8419 Westminster Blvd, Westminster, CA 926833308. Office phone: 7142489558.
What is Dr. Vivian Nguyen's NPI?
Dr. Vivian Nguyen's National Provider Identifier (NPI) is 1689869570, issued by NPPES.
Does Dr. Vivian Nguyen accept Medicare assignment?
Yes. Dr. Vivian Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Vivian Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.