Margaret Mary Duffy, MD
Nephrology Physician · Allentown, PA
Margaret Mary Duffy, MD is a nephrology physician with a practice address in Allentown, Pennsylvania, and NPI 1518233881, issued on Mar 30, 2012. Check the license (Pennsylvania MD461963, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Margaret Mary Duffy
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- MD461963 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1230 S Cedar Crest Blvd Stes 301, 302, 304, Allentown, PA 18103
- Phone
- (610) 432-4529
- Enumerated
- Mar 30, 2012
- Record last updated
- Jul 21, 2022
- Fax
- (610) 432-2206
- Medicare enrollment
- Enrolled (PECOS I20170907001314); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1230 S Cedar Crest Blvd Stes 301, 302, 304
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Tayyab Ali, MDNephrology Physician1710986559
- Audrey Anatalio, PA-CMedical Physician Assistant1316581259
- Cheryl Bitting, CRNPFamily Nurse Practitioner1891888301
- Ravindra Bollu, M.D.Nephrology Physician1194716845
- Eric Fels, D.O.Nephrology Physician1821089590
- Frederick Fleszler, MDNephrology Physician1588758353
Verify Margaret Mary Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD461963Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average nephrology physician in 2024
1,345 Medicare Part D claims for 193 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Farxiga126 claims
- Losartan Potassium114 claims
- Amlodipine Besylate80 claims
- Torsemide65 claims
- Calcium Acetate56 claims
- Spironolactone52 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: $266.43
4 payments; by number, the most common kind was food and beverage; the largest payer was Aurinia Pharma U.S., Inc. The 8,230 providers of this specialty with any payment received $3,091.37 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
- Kidney Care Specialists LLCAllentown, PA
- Valley Kidney Specialists, P.C.Wyomissing, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nephrology Physician providers in Pennsylvania
There are 651 nephrology physician records in Pennsylvania.
Other nephrology physician records in Pennsylvania
- Muhammad Abdulbasit, MD, FACPWilkes Barre, PA1265704225
- Mohamed Anwar Abdus Samad, MDYork, PA1285983684
- Samer Abou Chehade, M.DErie, PA1730744020
- Blaise AbramovitzPittsburgh, PA1093150922
- Parvaneh Abtahi, MDWyomissing, PA1245213099
- Azza AbubakerPhiladelphia, PA1821732298
- Scott Adler, MDPhiladelphia, PA1295986792
- Sandeep Aggarwal, M.D.Philadelphia, PA1548420326
- Gautam Agrawal, M.D , M.P.HGreensburg, PA1063737070
- Ravi Agrawal, M.B.B.SBethlehem, PA1396973178
Common questions
What is Margaret Mary Duffy, MD's NPI number?
Margaret Mary Duffy, MD's National Provider Identifier (NPI) is 1518233881, issued on Mar 30, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Mary Duffy, MD located?
The NPPES record lists a practice address at 1230 S Cedar Crest Blvd Stes 301, 302, 304, Allentown, PA, 18103. Phone: (610) 432-4529. Providers update this record themselves, so call before visiting.
How can I verify Margaret Mary Duffy, MD's license?
NPPES lists Pennsylvania license number MD461963, 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 Margaret Mary Duffy, MD prescribe under Medicare Part D?
In 2024, Margaret Mary Duffy, MD had 1,345 Medicare Part D claims for 193 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.