Robert I. Leventhal, MD
Gastroenterology Physician · Waterbury, CT
Robert I. Leventhal, MD is a gastroenterology physician with a practice address in Waterbury, Connecticut, and NPI 1275506214, issued on Feb 9, 2006. Check the license (Connecticut 029930, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Robert I. Leventhal
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 029930 CT
Self-reported in NPPES; status is on the state search - Practice location
- 1312 W Main St, Waterbury, CT 06708
- Phone
- (203) 756-6422
- Enumerated
- Feb 9, 2006
- Record last updated
- Apr 27, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (203) 756-2448
- Medicaid ID
- 001299305 CT
- Entity
- Type 1 · individual
Also registered at 1312 W Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Heller, M.D.Anesthesiology Physician1811970387
- John Manley, M.D.Anesthesiology Physician1447234802
- Paolo Mapelli, MDGastroenterology Physician1790757383
- Rachel Mello, CRNACertified Registered Nurse Anesthetist1851402457
- Katie Mitchell, CRNACertified Registered Nurse Anesthetist1003846940
- Ana Silva, APRNOccupational Health Nurse Practitioner1366297178
Verify Robert I. Leventhal in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 029930Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average gastroenterology physician in 2024
333 Medicare Part D claims for 134 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Dicyclomine Hcl80 claims
- Pantoprazole Sodium60 claims
- Amitriptyline Hcl34 claims
- Omeprazole25 claims
- Dexlansoprazole Dr21 claims
- Linzess15 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: $21.41
1 payment: food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 13,350 providers of this specialty with any payment received $5,015.95 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.
Gastroenterology Physician providers in Connecticut
There are 336 gastroenterology physician records in Connecticut.
Other gastroenterology physician records in Connecticut
- Alexander Abadir, MDNorwalk, CT1811429699
- Abera Abay, M.D.Norwich, CT1861489585
- Clara Abraham, MDNew Haven, CT1629139456
- Charles Adelmann, M.D.Norwalk, CT1861436511
- Anant Agarwalla, M.D.Wallingford, CT1326458589
- Badr Al Bawardy, MDNew Haven, CT1104111509
- Jamil Alexis, MDStamford, CT1164927968
- Rabab Oun Ali Anwar Ali, MBBSNew Haven, CT1124580949
- Pietro Andres, M.D.Stratford, CT1588607386
- Chioma Anjou, M.D.Torrington, CT1821358870
Common questions
What is Robert I. Leventhal, MD's NPI number?
Robert I. Leventhal, MD's National Provider Identifier (NPI) is 1275506214, issued on Feb 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert I. Leventhal, MD located?
The NPPES record lists a practice address at 1312 W Main St, Waterbury, CT, 06708. Phone: (203) 756-6422. Providers update this record themselves, so call before visiting.
How can I verify Robert I. Leventhal, MD's license?
NPPES lists Connecticut license number 029930, 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 Robert I. Leventhal, MD prescribe under Medicare Part D?
In 2024, Robert I. Leventhal, MD had 333 Medicare Part D claims for 134 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.