Doctor profile · Federal record
Dr. Nathan Nguyen, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Critical Care Medicine (Internal Medicine) Physician · Walnut Creek, CA
- NPI 1861636615
- Accepts Medicare
- 19 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1425 S Main St, Medical Office Building 1St Floor
Walnut Creek, CA 945965318
(925) 295-4050 - Mailing address
-
4867 W Sunset Blvd
Los Angeles, CA 900275969
Credentials & registration
- NPI registered
- April 2009 — 17 yrs on file
- Profile last updated
- November 30, 2021
- Year of graduation
- 2007 — 19 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- California #A107250 · Oregon #154500
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1861636615. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
25
Distinct HCPCS
1
Medicare allowed
$5,546
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99291 |
Critical care, first 30-74 minutes | 25 | 13 | $222 |
In context: peer comparison
Among 44 peers in this city , average services per provider: 260. This provider delivers 0.1× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Nathan Nguyen's medical specialty?
Dr. Nathan Nguyen practices Internal Medicine Physician in Walnut Creek, CA.
Where does Dr. Nathan Nguyen practice?
Dr. Nathan Nguyen practices at 1425 S Main St, Walnut Creek, CA 945965318. Office phone: 9252954050.
What is Dr. Nathan Nguyen's NPI?
Dr. Nathan Nguyen's National Provider Identifier (NPI) is 1861636615, issued by NPPES.
Does Dr. Nathan Nguyen accept Medicare assignment?
Yes. Dr. Nathan Nguyen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nathan Nguyen commonly perform?
Top Medicare-reported procedures in 2023: Critical care (HCPCS 99291). Source: CMS Medicare Physician & Other Practitioners file.