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

John W. Riordan, MD

Organization Specialist · NPI 1124217443

John W. Riordan, MD is a Specialist in San Francisco, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007

Practice location Address checks out

2100 Webster St Ste 412
San Francisco, CA 94115-2373
Phone: (415) 923-3815
Fax: (415) 749-5713
Show map & directions

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

Specialties & licences

Specialist (primary) Taxonomy 174400000X · Licence A052155 (CA)

Record details

NPI number1124217443
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official John Riordan — Md · (415) 923-3815
NPI enumeratedOctober 23, 2007
Last updated in NPPESOctober 23, 2007
Mailing address2100 Webster St, Ste 412, San Francisco, CA 94115-2373

Other providers in San Francisco