Roy Carl Shannon, MD
Internal Medicine Physician · Oroville, CA
Roy Carl Shannon, MD is an internal medicine physician with a practice address in Oroville, California, and NPI 1104880335, issued on Apr 14, 2006. Check the license (California C35734, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Roy Carl Shannon
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C35734 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
- Jul 13, 2026
- Fax
- (530) 533-4438
- Medicaid ID
- GR0014101 CA
- Entity
- Type 1 · individual
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Verify Roy Carl Shannon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C35734Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
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).
Roy Carl Shannon among 17,696 internal medicine physician records in California
Roy Carl Shannon, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.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 17,696 in California → Every provider in Oroville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sidharth Bagga, MD, MBAOroville, CA 959661285865436
- Norman Baron, M.D.Oroville, CA 959661447378682
- Virgil Duvernay, MD, PHD, FACPOroville, CA 959661285681056
- Matthew Fine, M.D.Oroville, CA 959661760437446
- Joan Harter, MDOroville, CA 959661114971322
- Anjali Kohli, M.D.Oroville, CA 959661669553533
- Linda Lay, D.O.Oroville, CA 959661164717815
- Rhea Licuanan, M.D.Oroville, CA 959661609864388
Common questions
What is Roy Carl Shannon, MD's NPI number?
Roy Carl Shannon, MD's National Provider Identifier (NPI) is 1104880335, issued on Apr 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roy Carl Shannon, 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 Roy Carl Shannon, MD's license?
NPPES lists California license number C35734, 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.
What is Roy Carl Shannon, 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.