1. Home
  2. Directory
  3. New York
  4. New York New York
  5. Pediatrics
  6. NPI Profile

DR. ALEXANDRA A NMASHIE-OSEI MD
NPI 1093389694
Pediatrics in New York, NY

Active since May 18, 2021PECOS Enrolled
1901 1ST AVE, NEW YORK, NY 10029(212) 423-6262 Get Directions Write a Review

NPPES record last updated: May 15, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 15, 2025, Jun 24, 2024, Sep 15, 2021 and 1 more (4 updates tracked since 2021).

About Dr. Alexandra A Nmashie-osei Md NPPES

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

DR. ALEXANDRA A NMASHIE-OSEI MD (NPI 1093389694) is an individual pediatrics provider in New York, New York, licensed in New York (331130-01) and active in the NPI registry since May 2021. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1093389694
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. ALEXANDRA A NMASHIE-OSEICredential: MD
Location Address1901 1ST AVENew York, NY 10029-7494
Mailing Address1901 1st Ave Rm 523New York, NY 10029-7494
Phone(212) 423-6262
Sole ProprietorNo
Enumeration DateMay 18, 2021
Last NPPES UpdateMay 15, 20254 updates tracked since enumeration
NPPES CertifiedMay 15, 2025
✔ NPI 1093389694 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in NY · 331130-01
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1901 1ST AVE, New York, NY 10029
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Alexandra A Nmashie-osei 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 Alexandra Nmashie-osei reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Westchester Medical Group, P.C.
20 mi
Critical Care Medicine
800 WESTCHESTER AVE STE N715
Rye Brook, NY 10573
  • Reassigned Medicare billing, New York enrollment
  • 470 clinicians in this Medicare group
NPI 1881653822 (908) 988-0428

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 10029 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$102.04 typical visit price
range $65.69 – $198.19
Typical copayment $25.51 (range $16.42 – $49.54)
Most-billed visit code 99203
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

KENNETH BOMPAROLA PA
Physician Assistant
1901 1ST AVE
NEW YORK, NY 10029
New York County (212) 423-6262
ESEOGHENE INYANG AKAMUNE PHARMD
Pharmacist (Pharmacotherapy)
1901 1ST AVE
NEW YORK, NY 10029
New York County (212) 423-6262
JONATHAN CHABON MD
Emergency Medicine
1901 1ST AVE
NEW YORK, NY 10029
New York County (212) 423-6684
KRITI BHANDARI MD
Student in an Organized Health Care Education/Training Program
1901 1ST AVE
NEW YORK, NY 10029
New York County (646) 988-5168
SEBASTIAN MARK MENDEZ
Psychiatry & Neurology (Psychiatry)
1901 1ST AVE
NEW YORK, NY 10029
New York County (646) 672-3143
KYRA QUYNN MANAYAN-LEONARD MD
Student in an Organized Health Care Education/Training Program
1901 1ST AVE
NEW YORK, NY 10029
New York County (844) 692-4692
ELENA ALAYETO LCSW
Social Worker (Clinical)
1901 1ST AVE
NEW YORK, NY 10029
New York County (212) 423-8633
BEATA EDYTA POPIS-MATEJAK MD
Internal Medicine (Critical Care Medicine)
1901 1ST AVE
NEW YORK, NY 10029
New York County (212) 423-6771

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 Nmashie-osei's NPI number?

The NPI number for Alexandra Nmashie-osei is 1093389694. It was assigned to this individual provider in the NPPES registry on May 18, 2021.

Where is Alexandra Nmashie-osei located?

Alexandra Nmashie-osei practices at 1901 1st Ave, New York, NY 10029. The listed phone number is (212) 423-6262.

What is Alexandra Nmashie-osei's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Alexandra Nmashie-osei enrolled in Medicare?

Yes. Alexandra Nmashie-osei is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alexandra Nmashie-osei's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Nmashie-osei reassigns Medicare benefits to Westchester Medical Group, P.C. (Rye Brook, 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 Nmashie-osei'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 Nmashie-osei was last updated on May 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.