James F. Longo, MD
Radiation Oncology Physician · Templeton, CA
James F. Longo, MD is a radiation oncology physician with a practice address in Templeton, California, and NPI 1083606602, issued on Aug 19, 2005. Check the license (California G50881, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- James F. Longo
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- G50881 CA
Self-reported in NPPES; status is on the state search - Practice location
- 274 Heather CT, Templeton, CA 93465
- Phone
- (805) 434-1859
- Enumerated
- Aug 19, 2005
- Record last updated
- Feb 5, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (805) 434-2383
- Medicaid ID
- 00G508810 CA
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Also registered at 274 Heather CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Noreen Johnston, N.P.Registered Nurse1629174693
Verify James F. Longo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G50881Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
James F. Longo among 735 radiation oncology physician records in California
James F. Longo, MD is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileNo · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2014 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in California
There are 735 radiation oncology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 735 in California → Every provider in Templeton → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Paul Pagnini, M.D.Templeton, CA 934651225188105
- Dylan Conroy, MDSanta Maria, CA 934541942761812
- Sheri Marquez, MDSanta Maria, CA 934541538149224
- Jonathan Vanwickle, MDSanta Maria, CA 934541811493737
- John Wilkinson, M.D.Lompoc, CA 934361568621803
- Robert Fishburn, MDSan Luis Obispo, CA 934051508858465
- Jonathan Stella, MDSan Luis Obispo, CA 934051790787141
- Lauren Tait, M.D.San Luis Obispo, CA 934051972821601
Common questions
What is James F. Longo, MD's NPI number?
James F. Longo, MD's National Provider Identifier (NPI) is 1083606602, issued on Aug 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is James F. Longo, MD located?
The NPPES record lists a practice address at 274 Heather CT, Templeton, CA, 93465. Phone: (805) 434-1859. Providers update this record themselves, so call before visiting.
How can I verify James F. Longo, MD's license?
NPPES lists California license number G50881, 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.