ANN L. NGUYEN MD.
NPI 1356510747
Pediatrics in New York, NY
About Ann L. Nguyen Md. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANN L. NGUYEN MD. (NPI 1356510747) is an individual pediatrics provider in New York, New York, licensed in New York (235153) and active in the NPI registry since February 2008. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ann L. Nguyen Md. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Ann Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
New York, NY 10025
- Reassigned Medicare billing, New York enrollment
- 5,251 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 10011 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEW YORK, NY 10011
NEW YORK, NY 10011
NEW YORK, NY 10011
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 Ann Nguyen's NPI number?
The NPI number for Ann Nguyen is 1356510747. It was assigned to this individual provider in the NPPES registry on February 29, 2008.
Where is Ann Nguyen located?
Ann Nguyen practices at 170 W 12th St Smith Building, 8th Floor, New York, NY 10011. The listed phone number is (212) 604-8630.
What is Ann Nguyen's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Ann Nguyen enrolled in Medicare?
Yes. Ann Nguyen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Ann Nguyen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ann Nguyen reassigns Medicare benefits to Montefiore Medical Center (New York, 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 Ann 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 Ann Nguyen was last updated on October 28, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 years 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.
# Ann L. Nguyen, MD. · NPI 1356510747
Pediatrics physician in New York, New York. Individual provider, active in the CMS NPPES registry since February 29, 2008.
## Identity
- **NPI:** 1356510747 (Entity type: Individual)
- **Enumerated:** February 29, 2008
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 235153 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 170 W 12TH ST, SMITH BUILDING, 8TH FLOOR, New York, NY 10011-8202
- **Phone:** (212) 604-8630
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Montefiore Medical Center (NPI 1760288278, New York, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 28, 2008
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Source: [NPI Profile](https://npiprofile.com/npi/1356510747) · Data from the CMS NPPES public registry.