John R. Fontanilla, M.D.
Nephrology Physician · Philadelphia, PA
John R. Fontanilla, M.D. is a nephrology physician with a practice address in Philadelphia, Pennsylvania, and NPI 1669688412, issued on May 15, 2007. Check the license (Pennsylvania MD445193, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- John R. Fontanilla
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- MD445193 PA
MT188798 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4453 Castor Ave, Philadelphia, PA 19124
- Phone
- (215) 744-2266
- Enumerated
- May 15, 2007
- Record last updated
- Jul 27, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (215) 743-9247
- Medicare enrollment
- Enrolled (PECOS I20120802000270); accepts Medicare assignment
- Medical or professional school
- Rutgers New Jersey Medical School, 2006
- Entity
- Type 1 · individual
Also registered at 4453 Castor Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Theodora Bernardini, D.ONephrology Physician1407817745
- Analiza Guerrero, NP-CGeneral Practice Registered Nurse1972821064
- Kelly Heiland, D.O.Nephrology Physician1801836705
- Kenneth Knowles, D.O.Nephrology Physician1811958564
- Michael Levin, D.O.Nephrology Physician1578524526
- Nicola Stepanian, D.O.Nephrology Physician1992018378
Verify John R. Fontanilla in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD445193Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average nephrology physician in 2024
775 Medicare Part D claims for 128 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate56 claims
- Farxiga46 claims
- Valsartan43 claims
- Furosemide39 claims
- Losartan Potassium39 claims
- Carvedilol32 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $657.42
18 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals 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
- Metropolitan Nephrology Associates PCPhiladelphia, PA
- Temple Physicians IncPhiladelphia, 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 John R. Fontanilla, M.D.'s NPI number?
John R. Fontanilla, M.D.'s National Provider Identifier (NPI) is 1669688412, issued on May 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John R. Fontanilla, M.D. located?
The NPPES record lists a practice address at 4453 Castor Ave, Philadelphia, PA, 19124. Phone: (215) 744-2266. Providers update this record themselves, so call before visiting.
How can I verify John R. Fontanilla, M.D.'s license?
NPPES lists Pennsylvania license number MD445193, 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 John R. Fontanilla, M.D. prescribe under Medicare Part D?
In 2024, John R. Fontanilla, M.D. had 775 Medicare Part D claims for 128 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is John R. Fontanilla, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.