Robert S. Dudnick, MD
Gastroenterology Physician · Philadelphia, PA
Robert S. Dudnick, MD is a gastroenterology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1295833630, issued on Sep 20, 2006. Check the license (Pennsylvania MD045109E, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Robert S. Dudnick
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- MD045109E PA
Self-reported in NPPES; status is on the state search - Practice location
- 5401 Old York RD, Philadelphia, PA 19141
- Phone
- (215) 456-8210
- Enumerated
- Sep 20, 2006
- Record last updated
- Feb 20, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (215) 329-1085
- Medicaid ID
- 05154105001 PA
- Medicare enrollment
- Enrolled (PECOS I20070917000616); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,049 in Pennsylvania → Look up another NPI →
Also registered at 5401 Old York RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert S. Dudnick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD045109ECheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average gastroenterology physician in 2024
53 Medicare Part D claims for 27 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Most prescribed
- Omeprazole26 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: $37.60
1 payment: food and beverage; the largest payer was Boston Scientific Corporation. 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.
Bills Medicare through one group practice
- University OF Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert S. Dudnick among 1,049 gastroenterology physician records in Pennsylvania
Robert S. Dudnick, MD is one of 1,049 gastroenterology physician records with a practice address in Pennsylvania. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 14% of them.
- NPI issued2006 · 14% of these records are older, 47% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1986 · median 2003 among the 769 with a school on file
- Record last updated2015 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Pennsylvania
There are 1,049 gastroenterology physician records in Pennsylvania.
All 1,049 in Pennsylvania → Every provider in Philadelphia → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jennifer Au, M.D.Philadelphia, PA 191411851552145
- Jordan Carty, MDPhiladelphia, PA 191411043889983
- Michael Davis, D.O.Philadelphia, PA 191411265649651
- Richard Depalma, D.O.Philadelphia, PA 191411114238367
- Yogesh Govil, MDPhiladelphia, PA 191411275514473
- Richard Kalman, M.D.Philadelphia, PA 191411184891020
- Maria Lagarde Mussa, MDPhiladelphia, PA 191411841588670
- Victor Navarro, M.D.Philadelphia, PA 191411407815236
Common questions
What is Robert S. Dudnick, MD's NPI number?
Robert S. Dudnick, MD's National Provider Identifier (NPI) is 1295833630, issued on Sep 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert S. Dudnick, MD located?
The NPPES record lists a practice address at 5401 Old York RD, Philadelphia, PA, 19141. Phone: (215) 456-8210. Providers update this record themselves, so call before visiting.
How can I verify Robert S. Dudnick, MD's license?
NPPES lists Pennsylvania license number MD045109E, 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 S. Dudnick, MD prescribe under Medicare Part D?
In 2024, Robert S. Dudnick, MD had 53 Medicare Part D claims for 27 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.