OrganizationActive
John W. Riordan, MD
NPI 1124217443 · Specialist · San Francisco, CA
John W. Riordan, MD is a Specialist organization in San Francisco, CA (NPI 1124217443).
Provider details
- NPI number
- 1124217443
- Entity type
- Organization
- Primary specialty
- SpecialistOther Service Providers
- Organization subpart
- No
- Authorized official
- John Riordan, MD(415) 923-3815
- License
- A052155 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(88/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
18 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
2100 Webster St
Ste 412
San Francisco, CA 94115-2373
Phone: (415) 923-3815
Fax: (415) 749-5713
Street-level locationGet directions
Mailing address
2100 Webster St
San Francisco, CA 94115-2373
Registry dates
- Enumerated
- 2007-10-23
- Last updated
- 2007-10-23
Frequently asked questions
- What is John W. Riordan, MD's NPI number?
- John W. Riordan, MD's National Provider Identifier (NPI) is 1124217443, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is John W. Riordan, MD?
- John W. Riordan, MD is classified in the NPPES registry as Specialist (Other Service Providers).
- Where is John W. Riordan, MD located?
- John W. Riordan, MD's practice location on file with NPPES is 2100 Webster St, San Francisco, CA 94115-2373.
- What is John W. Riordan, MD's phone number?
- The practice phone number listed in the NPPES registry for John W. Riordan, MD is (415) 923-3815.
- Who is the authorized official for John W. Riordan, MD?
- The authorized official listed on John W. Riordan, MD's NPPES record is John Riordan, MD. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is John W. Riordan, MD's NPI active?
- Yes — John W. Riordan, MD's NPI (1124217443) is active in the NPPES registry as of the last update on 2007-10-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.