ALEXANDRA HYEJOO YOON
NPI 1427511237
Psychiatry & Neurology - Child & Adolescent Psychiatry in White Plains, NY
About Alexandra Hyejoo Yoon NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDRA HYEJOO YOON (NPI 1427511237) is an individual child & adolescent psychiatry provider in White Plains, New York, licensed in New York (33-0978) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses
Group Practice 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
Alexandra Hyejoo Yoon 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 Reassignments
2Medicare enrollment records show Alexandra Yoon reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
White Plains, NY 10605
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: The New York And Presbyterian Hospital
- 174 clinicians in this Medicare group
New York, NY 10065
- Reassigned Medicare billing, New York enrollment
- 172 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.
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.
WHITE PLAINS, NY 10605
WHITE PLAINS, NY 10605
WHITE PLAINS, NY 10605
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 Yoon's NPI number?
The NPI number for Alexandra Yoon is 1427511237. It was assigned to this individual provider in the NPPES registry on April 9, 2019.
Where is Alexandra Yoon located?
Alexandra Yoon practices at 21 Bloomingdale Rd, White Plains, NY 10605. The listed phone number is (888) 694-5700.
What is Alexandra Yoon's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.
Is Alexandra Yoon enrolled in Medicare?
Yes. Alexandra Yoon 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 organizations bill Medicare for Alexandra Yoon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Yoon reassigns Medicare benefits to 2 organizations: The New York And Presbyterian Hosp (White Plains, NY) and Weill Medical College Of Cornell (New York, NY). Each 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 Yoon'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 Yoon was last updated on August 28, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Alexandra Hyejoo Yoon · NPI 1427511237
Child & Adolescent Psychiatry physician in White Plains, New York. Individual provider, active in the CMS NPPES registry since April 9, 2019.
## Identity
- **NPI:** 1427511237 (Entity type: Individual)
- **Enumerated:** April 9, 2019
- **Primary specialty:** Psychiatry & Neurology - Child & Adolescent Psychiatry · taxonomy 2084P0804X
- **State license:** 33-0978 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 21 BLOOMINGDALE RD, White Plains, NY 10605-1504
- **Phone:** (888) 694-5700
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): The New York And Presbyterian Hosp (NPI 1063683068, White Plains, NY); Weill Medical College Of Cornell (NPI 1871692210, New York, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** August 28, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1427511237) · Data from the CMS NPPES public registry.