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REBECCA WARKOL MD LLC
NPI 1508266479
Internal Medicine in Old Greenwich, CT

Active since August 28, 2014
8 W END AVE, OLD GREENWICH, CT 06870(203) 637-5406(203) 637-5408 Get Directions Write a Review

NPPES record last updated: May 14, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Rebecca Warkol Md Llc NPPES

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

REBECCA WARKOL MD LLC (NPI 1508266479) is a healthcare organization registered as an internal medicine in Old Greenwich, Connecticut and active in the NPI registry since August 2014. The organization lists Rebecca Warkol, Owner, as its authorized official.

NPPES Registry Identity

NPI1508266479
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameREBECCA WARKOL MD LLC
Location Address8 W END AVEOld Greenwich, CT 06870-1642
Mailing Address8 W End AveOld Greenwich, CT 06870-1642 · (203) 637-5406 · Fax (203) 637-5408
Phone(203) 637-5406
Fax(203) 637-5408
Organization SubpartNo
Authorized OfficialRebecca WarkolOwner · (203) 637-5406
Enumeration DateAugust 28, 2014
Last NPPES UpdateMay 14, 2015
✔ NPI 1508266479 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
8 W END AVE, Old Greenwich, CT 06870
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Other Identifiers 1

Medicare UPIN110010324CT

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)

Rebecca Warkol Md Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

4

Medicare enrollment records show 4 clinicians reassign Medicare billing to Rebecca Warkol MD LLC, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 4 within 10 miles. They are listed nearest first.

Clinicians, nearest first (4)

Burton Rubin, M.D.
Internal Medicine
NPI 1134105414
8 W END AVE
Old Greenwich, CT 06870
(203) 637-5406
✔ PECOS✔ Accepts MedicareSame address
Rebecca Warkol, MD
Internal Medicine
NPI 1184820110
8 W END AVE
Old Greenwich, CT 06870
(203) 637-5406
✔ PECOS✔ Accepts MedicareSame address
Melanie Kelton, M.D.
Internal Medicine
NPI 1083918577
8 W END AVE
Old Greenwich, CT 06870
(203) 637-5400
✔ PECOS✔ Accepts Medicare0.1 mi
Caroline Lodato, MD
Internal Medicine
NPI 1609075324
5 PERRYRIDGE RD GREENWICH HOSPITAL
Greenwich, CT 06830
(203) 863-3840
✔ PECOS✔ Accepts Medicare3.1 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 Rebecca Warkol MD LLC's NPI number?

The NPI number for Rebecca Warkol MD LLC is 1508266479. It was assigned to this organization in the NPPES registry on August 28, 2014.

Where is Rebecca Warkol MD LLC located?

Rebecca Warkol MD LLC is located at 8 W End Ave, Old Greenwich, CT 06870. The listed phone number is (203) 637-5406.

What is Rebecca Warkol MD LLC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Rebecca Warkol MD LLC enrolled in Medicare?

Yes. Rebecca Warkol MD LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Rebecca Warkol MD LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 4 clinicians, all in Internal Medicine, reassign their Medicare billing to Rebecca Warkol MD LLC. 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. Of these, 1 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Rebecca Warkol MD LLC was last updated on May 14, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.