Ralph Bailey Hanahan, M.D.
Therapeutic Radiology Physician · Santa Rosa, CA
Ralph Bailey Hanahan, M.D. is a therapeutic radiology physician with a practice address in Santa Rosa, California, and NPI 1801986641, issued on Oct 13, 2006. Check the license (California C30500, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Ralph Bailey Hanahan
- Credential
- M.D.
- Primary taxonomy
- Therapeutic Radiology Physician 2085R0203X
- License number
- C30500 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3555 Round Barn Cir, Santa Rosa, CA 95403
- Phone
- (707) 522-6875
- Enumerated
- Oct 13, 2006
- Record last updated
- Sep 11, 2025
- Fax
- (707) 576-0445
- Medicaid ID
- 00C305000 CA
- Entity
- Type 1 · individual
Also registered at 3555 Round Barn Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ralph Bailey Hanahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C30500Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Therapeutic Radiology Physician providers in California
There are 28 therapeutic radiology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other therapeutic radiology physician records in California
- Steve Benak, M.D.Riverbank, CA1861587727
- Bryan Chang, MDTorrance, CA1619151826
- Pauling Chang, MDSunnyvale, CA1194884692
- John Clark, M.D.Redding, CA1174664890
- Harvey Frey, M.D.Santa Monica, CA1609842392
- Don Goffinet, M.D.Palo Alto, CA1780724427
- Joseph Hodgkins, (RT)(R)(MR)(ARRT)Long Beach, CA1831692243
- Robert Johnson, M.D.San Luis Obispo, CA1598942781
- Owen Kim, M.D.Porterville, CA1861574352
- Richard Krieg, MDSan Francisco, CA1124062351
Common questions
What is Ralph Bailey Hanahan, M.D.'s NPI number?
Ralph Bailey Hanahan, M.D.'s National Provider Identifier (NPI) is 1801986641, issued on Oct 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ralph Bailey Hanahan, M.D. located?
The NPPES record lists a practice address at 3555 Round Barn Cir, Santa Rosa, CA, 95403. Phone: (707) 522-6875. Providers update this record themselves, so call before visiting.
How can I verify Ralph Bailey Hanahan, M.D.'s license?
NPPES lists California license number C30500, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.