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ROSLYN CHOSAK M.D.,L.L.C.
NPI 1205137783
Specialist in New Haven, CT

Active since November 15, 2010
2 CHURCH ST S, SUITE 501, NEW HAVEN, CT 06519(203) 562-5439(203) 624-5157 Get Directions Write a Review

NPPES record last updated: November 15, 2010. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Roslyn Chosak M.d.,l.l.c. NPPES

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

ROSLYN CHOSAK M.D.,L.L.C. (NPI 1205137783) is a healthcare organization registered as a specialist in New Haven, Connecticut and active in the NPI registry since November 2010. The organization lists Roslyn Chosak, Owner, as its authorized official.

NPPES Registry Identity

NPI1205137783
Entity TypeOrganization
Primary Taxonomy174400000X
Legal Business NameROSLYN CHOSAK M.D.,L.L.C.
Location Address2 CHURCH ST S, SUITE 501New Haven, CT 06519-1717
Mailing Address2 Church Street South, Suite 501New Haven, CT 06519 · (203) 562-5439 · Fax (203) 624-5157
Phone(203) 562-5439
Fax(203) 624-5157
Organization SubpartNo
Authorized OfficialRoslyn ChosakOwner · (203) 562-5439
Enumeration DateNovember 15, 2010
✔ NPI 1205137783 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in CT · 022991
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
2 CHURCH ST S, New Haven, CT 06519
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Other Identifiers 6

Other010022991CT02CT · Anthem
OtherNHP086CT · Oxford
Other1051396CT · Aetna
OtherOQ2292CT · Healthnet
Medicare UPINE28865CT
Other764-353CT · Connecticare

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Roslyn Chosak M.d.,l.l.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Roslyn Chosak M.D.,l.L.C., which bills Medicare for the services this clinician delivers.

Clinician (1)

Roslyn Chosak, M.D.
Obstetrics/Gynecology
NPI 1528023181
2 CHURCH ST S SUITE 501
New Haven, CT 06519
(203) 562-5439
✔ PECOS✔ Accepts Medicare0.2 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Roslyn Chosak M.D.,l.L.C.'s NPI number?

The NPI number for Roslyn Chosak M.D.,l.L.C. is 1205137783. It was assigned to this organization in the NPPES registry on November 15, 2010.

Where is Roslyn Chosak M.D.,l.L.C. located?

Roslyn Chosak M.D.,l.L.C. is located at 2 Church St S Suite 501, New Haven, CT 06519. The listed phone number is (203) 562-5439.

What is Roslyn Chosak M.D.,l.L.C.'s specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Roslyn Chosak M.D.,l.L.C. enrolled in Medicare?

Yes. Roslyn Chosak M.D.,l.L.C. is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Roslyn Chosak M.D.,l.L.C.?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Obstetrics/Gynecology) reassigns their Medicare billing to Roslyn Chosak M.D.,l.L.C.. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Roslyn Chosak M.D.,l.L.C. was last updated on November 15, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.