Thomas Nelson Mundorff, MD
Internal Medicine Physician · Oroville, CA
Thomas Nelson Mundorff, MD is an internal medicine physician with a practice address in Oroville, California, and NPI 1154385383, issued on Apr 14, 2006. Check the license (California G25438, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Nelson Mundorff
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G25438 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2721 Olive Hwy, Oroville, CA 95966
- Phone
- (530) 533-6061
- Enumerated
- Apr 14, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (530) 533-4438
- Medicaid ID
- GR0014101 CA
- Entity
- Type 1 · individual
Also registered at 2721 Olive Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mammen Chandy, M.D.Surgery Physician1689743064
- Nathaniel Howard, MDGastroenterology Physician1558325787
- Theresa O' Hair, FNPAcute Care Nurse Practitioner1942467519
- Jasveena Rai Dhugga, FNP-CFamily Nurse Practitioner1285347864
- Eric Redmer, PHARMDPharmacist1457405243
- Roy Shannon, MDInternal Medicine Physician1104880335
Verify Thomas Nelson Mundorff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G25438Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,760 Medicare Part D claims for 164 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 178 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen124 claims
- Furosemide107 claims
- Amlodipine Besylate106 claims
- Atorvastatin Calcium103 claims
- Omeprazole86 claims
- Sertraline Hcl86 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).
19 internal medicine physician records list a practice address in Oroville
They are 19 of the 916 NPPES records with a practice address in Oroville, and 17,696 internal medicine physician records in California.
All 19 in Oroville → All 17,696 in California → Every provider in Oroville →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Thomas Nelson Mundorff, MD's NPI number?
Thomas Nelson Mundorff, MD's National Provider Identifier (NPI) is 1154385383, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Nelson Mundorff, MD located?
The NPPES record lists a practice address at 2721 Olive Hwy, Oroville, CA, 95966. Phone: (530) 533-6061. Providers update this record themselves, so call before visiting.
How can I verify Thomas Nelson Mundorff, MD's license?
NPPES lists California license number G25438, 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 Nelson Mundorff, MD prescribe under Medicare Part D?
In 2024, Thomas Nelson Mundorff, MD had 2,760 Medicare Part D claims for 164 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Thomas Nelson Mundorff, MD'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.