DUY NGUYEN
NPI 1639788425
Psychiatry & Neurology - Psychiatry in San Mateo, CA
About Duy Nguyen NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DUY NGUYEN (NPI 1639788425) is an individual psychiatry provider in San Mateo, California, licensed in California (A188952) and active in the NPI registry since July 2020. He is enrolled in Medicare PECOS, maintains a secondary practice location in Fresno, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Duy Nguyen is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Duy Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Mateo, CA 94404
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Mark David Levine MD Professional Corporation
- 329 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94404 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN MATEO, CA 94404
SAN MATEO, CA 94404
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Duy Nguyen's NPI number?
The NPI number for Duy Nguyen is 1639788425. It was assigned to this individual provider in the NPPES registry on July 28, 2020.
Where is Duy Nguyen located?
Duy Nguyen practices at 999 Baker Way Ste 150, San Mateo, CA 94404. The listed phone number is (855) 501-1004.
What is Duy Nguyen's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Duy Nguyen enrolled in Medicare?
Yes. Duy Nguyen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Duy Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Duy Nguyen reassigns Medicare benefits to Mark David Levine, MD Burlingame PC (San Mateo, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Duy Nguyen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Duy Nguyen was last updated on August 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Duy Nguyen · NPI 1639788425
Psychiatry physician in San Mateo, California. Individual provider, active in the CMS NPPES registry since July 28, 2020.
## Identity
- **NPI:** 1639788425 (Entity type: Individual)
- **Enumerated:** July 28, 2020
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** A188952 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 999 BAKER WAY STE 150, San Mateo, CA 94404-1581
- **Phone:** (855) 501-1004
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mark David Levine, MD Burlingame PC (NPI 1770709263, San Mateo, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** August 25, 2026
- **Other identifiers:** Other 10533 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1639788425) · Data from the CMS NPPES public registry.