Robert Chalfin, MD
Internal Medicine Physician · Warminster, PA
Robert Chalfin, MD is an internal medicine physician with a practice address in Warminster, Pennsylvania, and NPI 1841295318, issued on Jun 20, 2005. Check the license (Pennsylvania MD0623406, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Robert Chalfin
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD0623406 PA
Self-reported in NPPES; status is on the state search - Practice location
- 225 Newtown RD, Warminster, PA 18974
- Phone
- (215) 441-6789
- Enumerated
- Jun 20, 2005
- Entity
- Type 1 · individual
Also registered at 225 Newtown RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexandra Agasar, RDRegistered Dietitian1518633239
- Jonathan Andrews, M.D.Internal Medicine Physician1134484942
- Gintaras Antanavicius, M.D.Surgery Physician1750398350
- William Bush, CRNACertified Registered Nurse Anesthetist1477502524
- Brynn Connor, PA-CPhysician Assistant1255913877
- Patricia Cooney, CRNACertified Registered Nurse Anesthetist1720036023
Verify Robert Chalfin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD0623406Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
6.2 times the Medicare Part D claims of the average internal medicine physician in 2024
17,256 Medicare Part D claims for 897 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims. 230 claims were for opioids.
Most prescribed
- Atorvastatin Calcium982 claims
- Levothyroxine Sodium803 claims
- Eliquis672 claims
- Furosemide619 claims
- Losartan Potassium602 claims
- Amlodipine Besylate591 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.
One hospital or facility affiliation
- Einstein Community Health Associates IncPhiladelphia, PA
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.
11 internal medicine physician records list a Warminster practice address
They are 11 of the 513 NPPES records with a Warminster practice address, and 8,636 internal medicine physician records in Pennsylvania.
All 11 in Warminster → All 8,636 in Pennsylvania → Every provider in Warminster →
Other internal medicine physician records in Pennsylvania
- Erin Aakhus, M.D.Philadelphia, PA1255652087
- Muhammad Aamir, MDAllentown, PA1477039147
- Saira Aamir, MDYork, PA1184515686
- John Aaron, MDWest Grove, PA1427094531
- Todd Aaron, MDPhiladelphia, PA1457350522
- Cybele Abad, M.D.Pittsburgh, PA1619900453
- Mario Abad, MDDuncannon, PA1710022975
- Joseph Abalos, M.D.Seneca, PA1215128434
- Ali Abbas, MDYork, PA1023343779
- Huda Abbas, MDDoylestown, PA1316187024
Common questions
What is Robert Chalfin, MD's NPI number?
Robert Chalfin, MD's National Provider Identifier (NPI) is 1841295318, issued on Jun 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert Chalfin, MD located?
The NPPES record lists a practice address at 225 Newtown RD, Warminster, PA, 18974. Phone: (215) 441-6789. Providers update this record themselves, so call before visiting.
How can I verify Robert Chalfin, MD's license?
NPPES lists Pennsylvania license number MD0623406, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert Chalfin, MD prescribe under Medicare Part D?
In 2024, Robert Chalfin, MD had 17,256 Medicare Part D claims for 897 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.