Mr. John Riordan MD
Also known as
- Professional nameRiordan, John William
Source: NPPES public registry.
About this NPIWhat this record shows.
NPI 1619040227 is registered to Mr. John Riordan MD, a Specialist practising at 2100 Webster St, Suite 320 in San Francisco, California. Specialist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Mr. John Riordan MD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Medicaid
Source: NPPES public registry.
Medicare enrollment
This provider holds a Medicare enrollment on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20080430000339NephrologyCA
Source: CMS PECOS public enrollment file.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Mr. John Riordan MD accepts. To confirm in-network status with your specific health plan, contact Mr. John Riordan MD directly at (415) 923-3815.
Frequently asked
Yes. NPI 1619040227 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Specialist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (415) 923-3815.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Mr. John Riordan MD is a Type-1 individual NPI.