Robert Altbaum, M.D.
Internal Medicine Physician · Westport, CT
Robert Altbaum, M.D. is an internal medicine physician with a practice address in Westport, Connecticut, and NPI 1285736124, issued on Sep 1, 2006. Check the license (Connecticut 021030, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Robert Altbaum
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 021030 CT
Self-reported in NPPES; status is on the state search - Practice location
- 333 Post Road West, Westport, CT 06880
- Phone
- (203) 226-0731
- Enumerated
- Sep 1, 2006
- Entity
- Type 1 · individual
Also registered at 333 Post Road West
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Baum, M.D.Internal Medicine Physician1437175486
- Jill Denowitz, M.D.Internal Medicine Physician1215013941
- Nina Karol, M.D.Internal Medicine Physician1548286818
- Robert Teltser, M.D.Internal Medicine Physician1821291675
Verify Robert Altbaum in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 021030Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
64 Medicare Part D claims for 16 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D.
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.
One hospital or facility affiliation
- Norwalk Community Health Center IncNorwalk, CT
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
20 internal medicine physician records list a Westport practice address
They are 20 of the 886 NPPES records with a Westport practice address, and 2,830 internal medicine physician records in Connecticut.
All 20 in Westport → All 2,830 in Connecticut → Every provider in Westport →
Other internal medicine physician records in Connecticut
- Christina AbavanaBridgeport, CT1508206574
- Hoda Abdel Salam, M.D.New Britain, CT1144509316
- Gada Abdelhafiz, MDNew London, CT1467649558
- Mahmoud Abdelrahman, MDBridgeport, CT1467072868
- Simon Abi-SalehBridgeport, CT1891315529
- Gerard Abidor, D.O.Bridgeport, CT1518014539
- Richard Abraham, M.D.Canton, CT1023044252
- Odaliz Abreu-Lanfranco, MDNew Haven, CT1538276134
- Nila Aburto, MDStamford, CT1396325718
- Angelo Accomando, M.D.East Haven, CT1063454247
Common questions
What is Robert Altbaum, M.D.'s NPI number?
Robert Altbaum, M.D.'s National Provider Identifier (NPI) is 1285736124, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Altbaum, M.D. located?
The NPPES record lists a practice address at 333 Post Road West, Westport, CT, 06880. Phone: (203) 226-0731. Providers update this record themselves, so call before visiting.
How can I verify Robert Altbaum, M.D.'s license?
NPPES lists Connecticut license number 021030, 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 Altbaum, M.D. prescribe under Medicare Part D?
In 2024, Robert Altbaum, M.D. had 64 Medicare Part D claims for 16 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.