JOHN A RITZO MD MEDICAL CORPORATION
NPI 1427948264
Family Medicine in San Mateo, CA

Q: What is John A Ritzo MD Medical Corporation's NPI number?

The NPI number for John A Ritzo MD Medical Corporation is 1427948264. It was assigned to this organization in the NPPES registry on July 3, 2025.

Q: What is John A Ritzo MD Medical Corporation's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Active since July 03, 2025

101 S SAN MATEO DR STE 206, SAN MATEO, CA 94401(650) 343-4003(650) 696-7040 Get Directions Write a Review

NPPES record last updated: July 3, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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About John A Ritzo Md Medical Corporation NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN A RITZO MD MEDICAL CORPORATION (NPI 1427948264) is a healthcare organization registered as a family medicine in San Mateo, California and active in the NPI registry since July 2025. The organization lists Johna A Ritzo, Physician / Owner, as its authorized official.

NPPES Registry Identity

NPI1427948264

Entity TypeOrganization

Primary Taxonomy207Q00000X

Legal Business NameJOHN A RITZO MD MEDICAL CORPORATION

Location Address101 S SAN MATEO DR STE 206San Mateo, CA 94401-3843

Mailing Address101 S San Mateo Dr Ste 206San Mateo, CA 94401-3843 · (650) 343-4003 · Fax (650) 696-7040

Phone(650) 343-4003

Fax(650) 696-7040

Organization SubpartNo

Authorized OfficialJohna A RitzoPhysician / Owner · (650) 533-7211

Enumeration DateJuly 3, 2025

NPPES CertifiedJuly 3, 2025

✔ NPI 1427948264 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

101 S SAN MATEO DR STE 206, San Mateo, CA 94401

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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is John A Ritzo MD Medical Corporation's NPI number?

The NPI number for John A Ritzo MD Medical Corporation is 1427948264. It was assigned to this organization in the NPPES registry on July 3, 2025.

Where is John A Ritzo MD Medical Corporation located?

John A Ritzo MD Medical Corporation is located at 101 S San Mateo Dr Ste 206, San Mateo, CA 94401. The listed phone number is (650) 343-4003.

What is John A Ritzo MD Medical Corporation's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

When was this NPI record last updated?

The NPPES record for John A Ritzo MD Medical Corporation was last updated on July 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.