DR. ALEXANDER CHASIN MD
NPI 1053841239
Emergency Medicine in Brooklyn, NY
About Dr. Alexander Chasin Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEXANDER CHASIN MD (NPI 1053841239) is an individual emergency medicine provider in Brooklyn, New York, licensed in New York (305781) and active in the NPI registry since June 2017. He is enrolled in Medicare PECOS, is affiliated with Long Island Jewish Medical Center, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. Alexander Chasin Md 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
3Medicare enrollment records show Alexander Chasin reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brooklyn, NY 11213
- Reassigned Medicare billing, New York enrollment
- 596 clinicians in this Medicare group
New Hyde Park, NY 11040
- Reassigned Medicare billing, New York enrollment
- 9,353 clinicians in this Medicare group
Poughkeepsie, NY 12601
- Reassigned Medicare billing, New York enrollment
- 201 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 3
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.
Long Island Jewish Medical Center
Acute Care Hospitals · New Hyde Park, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11212 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.
BROOKLYN, NY 11212
BROOKLYN, NY 11212
BROOKLYN, NY 11212
BROOKLYN, NY 11212
BROOKLYN, NY 11212
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 Alexander Chasin's NPI number?
The NPI number for Alexander Chasin is 1053841239. It was assigned to this individual provider in the NPPES registry on June 19, 2017.
Where is Alexander Chasin located?
Alexander Chasin practices at 1 Brookdale Plz, Brooklyn, NY 11212. The listed phone number is (718) 240-5180.
What is Alexander Chasin's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Alexander Chasin enrolled in Medicare?
Yes. Alexander Chasin 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 Alexander Chasin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Chasin reassigns Medicare benefits to 3 organizations: City Medical Of Upper East Side, PLLC (Brooklyn, NY), North Shore - Lij Medical PC (New Hyde Park, NY) and Emergency Physician Services Of New York, P.C. (Poughkeepsie, 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 Alexander Chasin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Alexander Chasin affiliated with any hospitals?
According to CMS data, Alexander Chasin is affiliated with Long Island Jewish Medical Center.
When was this NPI record last updated?
The NPPES record for Alexander Chasin was last updated on December 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. Alexander Chasin, MD · NPI 1053841239
Emergency Medicine physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since June 19, 2017.
## Identity
- **NPI:** 1053841239 (Entity type: Individual)
- **Enumerated:** June 19, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 305781 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 BROOKDALE PLZ, Brooklyn, NY 11212-3139
- **Phone:** (718) 240-5180
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): City Medical Of Upper East Side, PLLC (NPI 1972088086, Brooklyn, NY); North Shore - Lij Medical PC (NPI 1790043479, New Hyde Park, NY); Emergency Physician Services Of New York, P.C. (NPI 1093759847, Poughkeepsie, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** December 9, 2020
---
Source: [NPI Profile](https://npiprofile.com/npi/1053841239) · Data from the CMS NPPES public registry.