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DR. JAMES NGUYEN MD
NPI 1669009130
Student in an Organized Health Care Education/Training Program in Buffalo, NY

Active since March 25, 2020PECOS Enrolled
ELM AND CARLTON ST, BUFFALO, NY 14263(716) 845-2300 Get Directions Write a Review

NPPES record last updated: January 23, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 23, 2026, Mar 25, 2020 (2 updates tracked since 2020).

About Dr. James Nguyen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JAMES NGUYEN MD (NPI 1669009130) is an individual student in an organized health care education/training program in Buffalo, New York and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS and maintains a secondary practice location in Hershey.

NPPES Registry Identity

NPI1669009130
Entity TypeIndividualMale
Primary Taxonomy390200000X
Provider Legal NameDR. JAMES NGUYENCredential: MD
Location AddressELM AND CARLTON STBuffalo, NY 14263-0001
Mailing AddressElm And Carlton StBuffalo, NY 14263-0001 · (716) 845-2300
Phone(716) 845-2300
Sole ProprietorNo
Enumeration DateMarch 25, 2020
Last NPPES UpdateJanuary 23, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 23, 2026
✔ NPI 1669009130 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyStudent in an Organized Health Care Education/Training ProgramStudent, Health Care
Taxonomy Code390200000X
Definition
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License MD492656 (NY)
ELM AND CARLTON ST, Buffalo, NY 14263
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Secondary Practice Location 1

Location 1500 University DrHershey, PA 17033-2360 · Phone (714) 603-4597

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. James Nguyen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show James Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Roswell Park Cancer Institute
Same address
Multi-Specialty
ELM AND CARLTON ST
Buffalo, NY 14263
  • Reassigned Medicare billing, New York enrollment
  • 602 clinicians in this Medicare group
NPI 1720036593 (716) 845-2300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MICHELLE DOYLE MCCARTHY PA
Physician Assistant
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
DR. OMAR Y MIRZA DMD
Dentist
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-1067
EMILY KIRCHNER
Family Medicine
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (717) 845-2300
STEPHANIE ERIN MYSZKA F.N.P.- BC
Nurse Practitioner (Family)
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
ALEXANDRA VAZQUEZ AGACNP
Nurse Practitioner (Acute Care)
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
DR. DENISE MARIE JOHNSON PHARMD
Pharmacist
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-8584
DR. CALEB NATHANIEL SEAVEY MD PHD
Surgery (Surgical Oncology)
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300
MICHAEL S WINNICKI MD
Internal Medicine
ELM AND CARLTON ST
BUFFALO, NY 14263
Erie County (716) 845-2300

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 James Nguyen's NPI number?

The NPI number for James Nguyen is 1669009130. It was assigned to this individual provider in the NPPES registry on March 25, 2020.

Where is James Nguyen located?

James Nguyen practices at Elm And Carlton St, Buffalo, NY 14263. The listed phone number is (716) 845-2300.

What is James Nguyen's specialty?

The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.

Is James Nguyen enrolled in Medicare?

Yes. James Nguyen is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for James Nguyen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Nguyen reassigns Medicare benefits to Roswell Park Cancer Institute (Buffalo, NY). 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 James 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 James Nguyen was last updated on January 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.