John Pierce Gunderson, MD
Occupational Medicine Physician · Concord, CA
John Pierce Gunderson, MD is an occupational medicine physician with a practice address in Concord, California, and NPI 1215074794, issued on Jan 31, 2007. Check the license (California C032589, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Pierce Gunderson
- Credential
- MD
- Primary taxonomy
- Occupational Medicine Physician 2083X0100X
- License number
- C032589 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2231 Galaxy CT, Concord, CA 94520
- Phone
- (925) 685-7744
- Enumerated
- Jan 31, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (925) 685-0462
- Entity
- Type 1 · individual
8 nearest occupational medicine physician records → All 415 in California → Look up another NPI →
Also registered at 2231 Galaxy CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Kamnikar, PAPhysician Assistant1346471000
- Donald Lindo, P.A.Medical Physician Assistant1881819571
- Smita Pareek, M.D.Occupational Medicine Physician1295952323
Verify John Pierce Gunderson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C032589Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average occupational medicine physician in 2024
13 Medicare Part D claims, against an average of 794 among the 463 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
John Pierce Gunderson among 415 occupational medicine physician records in California
John Pierce Gunderson, MD is one of 415 occupational medicine physician records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 43% of them.
- NPI issued2007 · 43% of these records are older, 31% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 12% of these records are
- Record last updated2007 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2083X0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Occupational Medicine Physician providers in California
There are 415 occupational medicine physician records in California.
All 415 in California → Every provider in Concord → Occupational Medicine Physician nationwide →
The 8 occupational medicine physician records with the nearest ZIP codes
- Smita Pareek, M.D.Concord, CA 945201295952323
- Elizabeth Sutherland, M.D.Danville, CA 945261952347569
- Patricia Jones, MDAntioch, CA 945091760560841
- Sachin Kapoor, DOAntioch, CA 945091780762864
- Jaspal Sidhu, MDAntioch, CA 945091649358722
- Joseph Fanucchi, MDAlamo, CA 945071184938334
- Melinda Carol, MD MPHFremont, CA 945381053449918
- Alan Hsu, MDFremont, CA 945381760560247
Common questions
What is John Pierce Gunderson, MD's NPI number?
John Pierce Gunderson, MD's National Provider Identifier (NPI) is 1215074794, issued on Jan 31, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Pierce Gunderson, MD located?
The NPPES record lists a practice address at 2231 Galaxy CT, Concord, CA, 94520. Phone: (925) 685-7744. Providers update this record themselves, so call before visiting.
How can I verify John Pierce Gunderson, MD's license?
NPPES lists California license number C032589, 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 John Pierce Gunderson, MD prescribe under Medicare Part D?
In 2024, John Pierce Gunderson, MD had 13 Medicare Part D claims; the average among occupational medicine physician prescribers was 794. 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.