Rebecca Lipton Warkol, MD
Internal Medicine Physician · Old Greenwich, CT
Rebecca Lipton Warkol, MD is an internal medicine physician with a practice address in Old Greenwich, Connecticut, and NPI 1184820110, issued on Jun 26, 2007. Check the license (Connecticut 045522, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Rebecca Lipton Warkol
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 045522 CT
241460-1 NY
Self-reported in NPPES; status is on the state search - Practice location
- 8 W End Ave, Old Greenwich, CT 06870
- Phone
- (203) 637-5406
- Enumerated
- Jun 26, 2007
- Record last updated
- Aug 21, 2024
- Fax
- (203) 637-5408
- Medicare enrollment
- Enrolled (PECOS I20070829000885); accepts Medicare assignment
- Medical or professional school
- New York Medical College, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,623 in Connecticut → Look up another NPI →
Also registered at 8 W End Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberly Asante, MDPediatrics Physician1952896599
- Therese Bernstein, APRNPediatric Nurse Practitioner1033459334
- Alison Cass, M.D.Pediatrics Physician1942373113
- Jessica EpsteinPediatrics Physician1902260755
- Amy Kappelman, M.D.Pediatrics Physician1275733651
- Melanie Kelton, M.D.Internal Medicine Physician1083918577
Verify Rebecca Lipton Warkol in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 045522Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,932 Medicare Part D claims for 201 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 15 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium211 claims
- Atorvastatin Calcium160 claims
- Levothyroxine Sodium130 claims
- Losartan Potassium100 claims
- Amlodipine Besylate93 claims
- Metformin Hcl Er66 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $55.94
3 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Old Greenwich Medical Group LLCOld Greenwich, CT
- Rebecca Warkol MD LLCOld Greenwich, CT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rebecca Lipton Warkol among 2,623 internal medicine physician records in Connecticut
Rebecca Lipton Warkol, MD is one of 2,623 internal medicine physician records with a practice address in Connecticut. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 48% of them.
- NPI issued2007 · 48% of these records are older, 44% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2003 · median 2004 among the 1,646 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 internal medicine physician records list a practice address in Old Greenwich
They are 6 of the 161 NPPES records with a practice address in Old Greenwich, and 2,623 internal medicine physician records in Connecticut.
All 2,623 in Connecticut → Every provider in Old Greenwich → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Melanie Kelton, M.D.Old Greenwich, CT 068701083918577
- Craig Olin, MDOld Greenwich, CT 068701588776173
- Jayne Pincus, M.D.Old Greenwich, CT 068701922166529
- Burton Rubin, M.D.Old Greenwich, CT 068701134105414
- Edra Stern, MDOld Greenwich, CT 068701164624557
- Mark Anderson, M.D.Ridgefield, CT 068771679640866
- Lauren Bumby, M.D.Ridgefield, CT 068771407909302
- Jay D'Orso, MDRidgefield, CT 068771578571121
Common questions
What is Rebecca Lipton Warkol, MD's NPI number?
Rebecca Lipton Warkol, MD's National Provider Identifier (NPI) is 1184820110, issued on Jun 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Rebecca Lipton Warkol, MD located?
The NPPES record lists a practice address at 8 W End Ave, Old Greenwich, CT, 06870. Phone: (203) 637-5406. Providers update this record themselves, so call before visiting.
How can I verify Rebecca Lipton Warkol, MD's license?
NPPES lists Connecticut license number 045522, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rebecca Lipton Warkol, MD prescribe under Medicare Part D?
In 2024, Rebecca Lipton Warkol, MD had 1,932 Medicare Part D claims for 201 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.