Doctor profile · Federal record
Dr. Adrienne Nguyen, MD
Gastroenterology Physician (CMS: Gastroenterology) · Gastroenterology Physician · San Carlos, CA
- NPI 1376635219
- Accepts Medicare
- 30 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1000 Laurel St
San Carlos, CA 940703939
(650) 596-8800
fax (650) 596-8802 - Additional location
-
6500 Hospital Dr
Hannibal, MO 634016890
(573) 629-3491
fax (573) 629-3429
Credentials & registration
- NPI registered
- September 2006 — 20 yrs on file
- Profile last updated
- April 14, 2025
- Year of graduation
- 1996 — 30 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State licenses (2)
- California #C53504 · Missouri #2013009358
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1376635219. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
286
Distinct HCPCS
5
Medicare allowed
$25,918
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 154 | 134 | $77 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 63 | 61 | $81 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 46 | 46 | $126 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 12 | 12 | $113 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 11 | 11 | $168 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 57. This provider delivers 5.0× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Adrienne Nguyen's medical specialty?
Dr. Adrienne Nguyen practices Gastroenterology Physician in San Carlos, CA.
Where does Dr. Adrienne Nguyen practice?
Dr. Adrienne Nguyen practices at 1000 Laurel St, San Carlos, CA 940703939. Office phone: 6505968800.
What is Dr. Adrienne Nguyen's NPI?
Dr. Adrienne Nguyen's National Provider Identifier (NPI) is 1376635219, issued by NPPES.
Does Dr. Adrienne Nguyen accept Medicare assignment?
Yes. Dr. Adrienne Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Adrienne Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Initial hospital care with straightforward or low level of medical decision making (HCPCS 99221); Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222). Source: CMS Medicare Physician & Other Practitioners file.