DR. CATHY J CHEN D.O.
NPI 1306378500
Emergency Medicine in Brooklyn, NY
About Dr. Cathy J Chen D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CATHY J CHEN D.O. (NPI 1306378500) is an individual emergency medicine provider in Brooklyn, New York, licensed in New Jersey (25MB13164400) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS, is affiliated with Robert Wood Johnson University Hospital - Somerset, and maintains a secondary practice location in Brooklyn.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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
Dr. Cathy J Chen D.o. 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
4Medicare enrollment records show Cathy Chen reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Livingston, NJ 07039
- Reassigned Medicare billing, New Jersey enrollment
- 1,913 clinicians in this Medicare group
Somerset, NJ 08873
- Reassigned Medicare billing, New Jersey enrollment
- 1,557 clinicians in this Medicare group
Flemington, NJ 08822
- Reassigned Medicare billing, New Jersey enrollment
- 48 clinicians in this Medicare group
Flemington, NJ 08822
- Reassigned Medicare billing, New Jersey enrollment
- 27 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 2
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.
Robert Wood Johnson University Hospital - Somerset
Acute Care Hospitals · Somerville, NJPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11237 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 11237
BROOKLYN, NY 11237
BROOKLYN, NY 11237
BROOKLYN, NY 11237
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 Cathy Chen's NPI number?
The NPI number for Cathy Chen is 1306378500. It was assigned to this individual provider in the NPPES registry on March 28, 2017.
Where is Cathy Chen located?
Cathy Chen practices at 374 Stockholm St, Brooklyn, NY 11237. The listed phone number is (718) 963-7272.
What is Cathy Chen's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Cathy Chen enrolled in Medicare?
Yes. Cathy Chen 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 Cathy Chen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Cathy Chen reassigns Medicare benefits to 4 organizations: Rwjbh Observation Associates LLC (Livingston, NJ), Rwjbh Emergency Medicine Associates, LLC (Somerset, NJ), Hunterdon Urgent Care PC (Flemington, NJ) and Pegasus Emergency Group PA (Flemington, NJ). 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 Cathy Chen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Cathy Chen affiliated with any hospitals?
According to CMS data, Cathy Chen is affiliated with Robert Wood Johnson University Hospital - Somerset.
When was this NPI record last updated?
The NPPES record for Cathy Chen was last updated on July 31, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Cathy J Chen, D.O. · NPI 1306378500
Emergency Medicine physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since March 28, 2017.
## Identity
- **NPI:** 1306378500 (Entity type: Individual)
- **Enumerated:** March 28, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 25MB13164400 (New Jersey)
- **Sole proprietor:** No
## Practice location
- **Address:** 374 STOCKHOLM ST, Brooklyn, NY 11237-4006
- **Phone:** (718) 963-7272
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Rwjbh Observation Associates LLC (NPI 1760095806, Livingston, NJ); Rwjbh Emergency Medicine Associates, LLC (NPI 1912510041, Somerset, NJ); Hunterdon Urgent Care PC (NPI 1154791796, Flemington, NJ); Pegasus Emergency Group PA (NPI 1336179621, Flemington, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rowan University School Of Osteopathic Medicine, class of 2017
## Record status
- **NPPES last updated:** July 31, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1306378500) · Data from the CMS NPPES public registry.