James S. Nagel, MD
Internal Medicine Physician · Chico, CA
James S. Nagel, MD is an internal medicine physician with a practice address in Chico, California, and NPI 1104822410, issued on Jun 22, 2005. Check the license (California G78311, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James S. Nagel
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G78311 CA
Self-reported in NPPES; status is on the state search - Practice location
- 70 Declaration Dr, Chico, CA 95973
- Phone
- (530) 893-0105
- Enumerated
- Jun 22, 2005
- Record last updated
- Jun 5, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (530) 893-0163
- Medicaid ID
- 00G783110 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify James S. Nagel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G78311Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average internal medicine physician in 2024
677 Medicare Part D claims for 109 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. 19 claims were for opioids.
Most prescribed
- Testosterone Cypionate146 claims
- Armour Thyroid83 claims
- Progesterone80 claims
- Estradiol Valerate52 claims
- Levothyroxine Sodium41 claims
- Np Thyroid26 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.
James S. Nagel among 17,696 internal medicine physician records in California
James S. Nagel, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2014 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Chico → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Louise KroneChico, CA 959731295787554
- Vimali Paul, M.D.Chico, CA 959731700881448
- Ahmet Turek, MDChico, CA 959731922154921
- Hyung An, M.D.Paradise, CA 959691336108851
- Kae Aung, M.D.Paradise, CA 959691588693261
- David Damazo, M.D.Paradise, CA 959691134173230
- Charles Denman, M.D.Paradise, CA 959691023285889
- Sirisha Mahankali, M.D.Paradise, CA 959691861426199
Common questions
What is James S. Nagel, MD's NPI number?
James S. Nagel, MD's National Provider Identifier (NPI) is 1104822410, issued on Jun 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is James S. Nagel, MD located?
The NPPES record lists a practice address at 70 Declaration Dr, Chico, CA, 95973. Phone: (530) 893-0105. Providers update this record themselves, so call before visiting.
How can I verify James S. Nagel, MD's license?
NPPES lists California license number G78311, 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 James S. Nagel, MD prescribe under Medicare Part D?
In 2024, James S. Nagel, MD had 677 Medicare Part D claims for 109 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.