Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. John R Fontanilla, MD

Individual provider Internal Medicine Physician · NPI 1669688412

Dr. John R Fontanilla, MD is a Nephrology in Philadelphia, Pennsylvania. Graduated from Rutgers New Jersey Medical School in 2006, 20 years ago. Practices with Metropolitan Nephrology Associates PC, a 9-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
20
Trained at
Rutgers New Jersey Medical School
Licensed in
PA
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

4453 Castor Ave Ste B
Philadelphia, PA 19124-3846
Phone: (215) 744-2266
Fax: (215) 743-9247
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence MD445193 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MT188798 (PA)

Record details

NPI number1669688412
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 15, 2007
Last updated in NPPESJuly 27, 2012

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 2006 (20 years in practice)
Group practice Metropolitan Nephrology Associates Pc — 9 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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