ESTHER KWAK
NPI 1073908083
Emergency Medicine in Brooklyn, NY
About Esther Kwak NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ESTHER KWAK (NPI 1073908083) is an individual emergency medicine provider in Brooklyn, New York, licensed in New York (297284) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS, is affiliated with Suny/downstate University Hospital Of Brooklyn, and is a graduate of State University Of New York At Stony Brook, School Of Medicine (2015).
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 and accepts Medicare assignment
Esther Kwak 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 Esther Kwak reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brooklyn, NY 11203
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: State Of New York Comptrollers Office
- 67 clinicians in this Medicare group
Brooklyn, NY 11203
- Reassigned Medicare billing, New York enrollment
- Also billed through NPI 1396318986 (New York)
- 63 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Suny/Downstate University Hospital Of Brooklyn
Acute Care Hospitals · Brooklyn, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11203 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
BROOKLYN, NY 11203
BROOKLYN, NY 11203
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 Esther Kwak's NPI number?
The NPI number for Esther Kwak is 1073908083. It was assigned to this individual provider in the NPPES registry on April 6, 2015.
Where is Esther Kwak located?
Esther Kwak practices at 450 Clarkson Ave, Brooklyn, NY 11203. The listed phone number is (718) 245-3318.
What is Esther Kwak's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Esther Kwak enrolled in Medicare?
Yes. Esther Kwak 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 Esther Kwak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Esther Kwak reassigns Medicare benefits to 2 organizations: Suny Health Science Center At Bklyn (Brooklyn, NY) and University Hospital Of Brooklyn Suny Downstate Health Sciences Univers (Brooklyn, 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 Esther Kwak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Esther Kwak affiliated with any hospitals?
According to CMS data, Esther Kwak is affiliated with Suny/Downstate University Hospital Of Brooklyn.
When was this NPI record last updated?
The NPPES record for Esther Kwak was last updated on July 25, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Esther Kwak · NPI 1073908083
Emergency Medicine physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since April 6, 2015.
## Identity
- **NPI:** 1073908083 (Entity type: Individual)
- **Enumerated:** April 6, 2015
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 297284 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 450 CLARKSON AVE, Brooklyn, NY 11203-2012
- **Phone:** (718) 245-3318
## 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): Suny Health Science Center At Bklyn (NPI 1588077994, Brooklyn, NY); University Hospital Of Brooklyn Suny Downstate Health Sciences Univers (NPI 1740853340, Brooklyn, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Stony Brook, School Of Medicine, class of 2015
## Record status
- **NPPES last updated:** July 25, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1073908083) · Data from the CMS NPPES public registry.