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MS. ALEXANDRA EVE CHALFIN MA
NPI 1457085011
Student in an Organized Health Care Education/Training Program in New York, NY

Active since July 11, 2022PECOS Enrolled
57 W 57TH ST STE 1007, NEW YORK, NY 10019(212) 658-0110 Get Directions Write a Review

NPPES record last updated: July 11, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Ms. Alexandra Eve Chalfin Ma NPPES

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

MS. ALEXANDRA EVE CHALFIN MA (NPI 1457085011) is an individual student in an organized health care education/training program in New York, New York and active in the NPI registry since July 2022. She is enrolled in Medicare PECOS and is a graduate of Other (2024).

NPPES Registry Identity

NPI1457085011
Entity TypeIndividualFemale
Primary Taxonomy390200000X
Provider Legal NameMS. ALEXANDRA EVE CHALFINCredential: MA
Location Address57 W 57TH ST STE 1007New York, NY 10019-2802
Mailing Address21 Dunham RdScarsdale, NY 10583-6005 · (914) 960-1283
Phone(212) 658-0110
Sole ProprietorYes
Medical School CMSOtherGraduated 2024
Enumeration DateJuly 11, 2022
NPPES CertifiedJuly 11, 2022
✔ NPI 1457085011 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ 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.
57 W 57TH ST STE 1007, New York, NY 10019
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Alexandra Eve Chalfin Ma is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID840758173
PECOS Enrollment IDI20260818001055
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 Alexandra Chalfin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

New York City Health And Hospitals Corporation
1.9 mi
Skilled Nursing Facility
900 MAIN ST, ROOM A22-4
New York, NY 10044
  • Reassigned Medicare billing, New York enrollment
  • 1,615 clinicians in this Medicare group
NPI 1679581607 (212) 848-6263

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 5

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

CHRISTINE J CHO PSYD
Psychologist (Clinical Child & Adolescent)
57 W 57TH ST STE 1007
NEW YORK, NY 10019
New York County (212) 658-0110
BROOKE EDELMAN
Student in an Organized Health Care Education/Training Program
57 W 57TH ST STE 1007
NEW YORK, NY 10019
New York County (212) 658-0110
CASEY ELLA NORDBERG
Counselor (Mental Health)
57 W 57TH ST STE 1007
NEW YORK, NY 10019
New York County (212) 658-0110
DR. KATHERINE FRAWLEY GIBSON PSY.D.
Psychologist (Clinical)
57 W 57TH ST STE 1007
NEW YORK, NY 10019
New York County (212) 658-0110
DR. CAROLINE JOY HARVEY PSY.D.
Psychologist (Clinical)
57 W 57TH ST STE 1007
NEW YORK, NY 10019
New York County (212) 658-0110

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 Alexandra Chalfin's NPI number?

The NPI number for Alexandra Chalfin is 1457085011. It was assigned to this individual provider in the NPPES registry on July 11, 2022.

Where is Alexandra Chalfin located?

Alexandra Chalfin practices at 57 W 57th St Ste 1007, New York, NY 10019. The listed phone number is (212) 658-0110.

What is Alexandra Chalfin's specialty?

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

Is Alexandra Chalfin enrolled in Medicare?

Yes. Alexandra Chalfin is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alexandra Chalfin's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Chalfin reassigns Medicare benefits to New York City Health And Hospitals Corporation (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 Alexandra Chalfin'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 Alexandra Chalfin was last updated on July 11, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.