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

Dr. John D Mazzarella, D.P.M.

Orthopaedic Foot and Ankle Surgery Physician in Lisle, IL · enumerated 2006.

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

National Provider Identifier

1780748319

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Registry record

Entity type Individual (Type 1)

Name Dr. John D Mazzarella

Credential D.P.M.

Sex Male

Practice address Lisle, IL, 60532

Phone (630) 355-3600

Fax (630) 355-3601

Enumeration date Dec 20, 2006

Last updated in NPPES Jul 21, 2022

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

Taxonomy & licenses

207XX0004X Orthopaedic Foot and Ankle Surgery Physician Allopathic & Osteopathic Physicians · License 016004364 (IL) Primary

DPM · Doctor of Podiatric Medicine: A physician specializing in medical and surgical care of the foot and ankle. About the DPM credential

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

Is NPI 1780748319 active?

Yes, as of the latest NPPES snapshot, NPI 1780748319 is active (record last updated 2022-07-21).

How do I verify John Mazzarella's NPI record?

Cross-check NPI 1780748319 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Dupage Health Specialists Sc Obstetrics & Gynecology Physician · Lisle, IL NPI 1285628057 Audrey Bromberger Obstetrics & Gynecology Physician · Lisle, IL NPI 1376537233 Nina Khazen Internal Medicine Physician · Lisle, IL NPI 1861486722 Paul Capriotti Psychiatry Physician · Lisle, IL NPI 1609859271 Kirby Strohm Clinical Social Worker · Lisle, IL NPI 1477646347 Kimberly Wright Obstetrics & Gynecology Physician · Lisle, IL NPI 1083784227 Jill Groezinger Professional Counselor · Lisle, IL NPI 1710058169 Legacy Clinical Consultants Mental Health Counselor · Lisle, IL NPI 1497823900

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.