Ralph Hanahan M.D.
About this NPIWhat this record shows.
NPI 1801986641 is registered to Ralph Hanahan M.D., a Therapeutic Radiology Physician practising at 3555 Round Barn Cir in Santa Rosa, California. Therapeutic Radiology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Ralph Hanahan M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2006.
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.
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 Ralph Hanahan M.D. accepts. To confirm in-network status with your specific health plan, contact Ralph Hanahan M.D. directly at (707) 522-6875.
Frequently asked
Yes. NPI 1801986641 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Therapeutic Radiology Physician 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 (707) 522-6875.
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. Ralph Hanahan M.D. is a Type-1 individual NPI.