Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. John R Fontanilla, M.D.

Nephrology Physician in Philadelphia, PA · enumerated 2007 · practices at Metropolitan Nephrology Associates, P.C..

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1669688412

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Registry record

Entity type Individual (Type 1)

Name Dr. John R Fontanilla

Credential M.D.

Sex Male

Practice address Philadelphia, PA, 19124

Phone (215) 744-2266

Fax (215) 743-9247

Enumeration date May 15, 2007

Last updated in NPPES Jul 27, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MT188798 (PA) Secondary

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License MD445193 (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1007278000113	Other	PA	TPI MEDICAID GROUP
CD4829	Other	PA	TPI RAILROAD MEDICARE GROUP ID
597586	Other	PA	TPI MEDICARE GROUP

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify John Fontanilla's NPI record?

Cross-check NPI 1669688412 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1669688412 active?

Yes, as of the latest NPPES snapshot, NPI 1669688412 is active (record last updated 2012-07-27).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-27.