Thomas M. Guerrero, MD, PHD
Radiation Oncology Physician · Oroville, CA
Thomas M. Guerrero, MD, PHD is a radiation oncology physician with a practice address in Oroville, California, and NPI 1932281334, issued on Oct 19, 2006. Check the license (California A66756, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas M. Guerrero
- Credential
- MD, PHD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- A66756 CA
4301106275 MI
L5350 TX
Self-reported in NPPES; status is on the state search - Practice location
- 2809 Olive Hwy Ste 110, Oroville, CA 95966
- Phone
- (530) 538-5600
- Enumerated
- Oct 19, 2006
- Record last updated
- Jul 22, 2025
- Medicaid IDs
- 152172601 TX
1932281334 MI - Medicare enrollment
- Enrolled (PECOS I20220902001023); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 1997
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 735 in California → Look up another NPI →
Verify Thomas M. Guerrero in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A66756Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% fewer Medicare Part D claims than the average radiation oncology physician in 2024
126 Medicare Part D claims for 52 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Tamsulosin Hcl25 claims
- Hydrocodone-Acetaminophen20 claims
- Lidocaine Hcl Viscous20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- Orohealth Corporation A Non Profit Healthcare SystemOroville, CA
- Paragon Chico Medical Group IncChico, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas M. Guerrero among 735 radiation oncology physician records in California
Thomas M. Guerrero, MD, PHD 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. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 55% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1997 · median 2005 among the 545 with a school on file
- Record last updated2025 · 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.
All 735 in California → Every provider in Oroville → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Richard Evans, MDGrass Valley, CA 959451649344953
- Clayton Hess, MDGrass Valley, CA 959451235429507
- David Kraus, MDGrass Valley, CA 959451710987953
- Matthew Allen, MDRedding, CA 960011235301714
- Nii Ankrah, M.D.Redding, CA 960011730574302
- Vidya Bobba, M.D.Redding, CA 960011659370799
- Wayne Koll, M.D.Redding, CA 960011548269699
- David Mantik, MDRedding, CA 960011669421012
Common questions
What is Thomas M. Guerrero, MD, PHD's NPI number?
Thomas M. Guerrero, MD, PHD's National Provider Identifier (NPI) is 1932281334, issued on Oct 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas M. Guerrero, MD, PHD located?
The NPPES record lists a practice address at 2809 Olive Hwy Ste 110, Oroville, CA, 95966. Phone: (530) 538-5600. Providers update this record themselves, so call before visiting.
How can I verify Thomas M. Guerrero, MD, PHD's license?
NPPES lists California license number A66756, 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.
How much does Thomas M. Guerrero, MD, PHD prescribe under Medicare Part D?
In 2024, Thomas M. Guerrero, MD, PHD had 126 Medicare Part D claims for 52 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
What is Thomas M. Guerrero, MD, PHD's MIPS final score?
The 2023 MIPS final score is 73.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.