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

John a Ritzo MD Medical Corporation

Organization Family Medicine Physician · NPI 1427948264

John a Ritzo MD Medical Corporation is a Family Medicine Physician in San Mateo, California. Registered with an NPI since 2025.

In the registry since
2025

Practice location Address checks out

101 S San Mateo Dr Ste 206
San Mateo, CA 94401-3843
Phone: (650) 343-4003
Fax: (650) 696-7040
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X

Record details

NPI number1427948264
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Johna Ritzo — Physician / Owner · (650) 533-7211
NPI enumeratedJuly 3, 2025
Last updated in NPPESJuly 3, 2025
Certification dateJuly 3, 2025
Mailing address101 S San Mateo Dr Ste 206, San Mateo, CA 94401-3843

Other providers in San Mateo