Julie M. Nefkens, MD
Occupational Medicine Physician · Martinez, CA
Julie M. Nefkens, MD is an occupational medicine physician with a practice address in Martinez, California, and NPI 1417029240, issued on Nov 15, 2006. Check the license (California G71955, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Julie M. Nefkens
- Credential
- MD
- Primary taxonomy
- Occupational Medicine Physician 2083X0100X
- License number
- G71955 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 Muir RD, Martinez, CA 94553
- Phone
- (925) 372-1000
- Enumerated
- Nov 15, 2006
- Record last updated
- Jan 11, 2022
- Medicaid ID
- 00G719550 CA
- Entity
- Type 1 · individual
Also registered at 200 Muir RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sharon Abrams, MDDiagnostic Radiology Physician1780762856
- Elizabeth Aguirre, PHARM.D.Pharmacist1518119833
- Mona Ahmad, M.D.Physical Medicine & Rehabilitation Physician1881128510
- Eric Alexander, MDNeuromuscular Medicine (Physical Medicine & Rehabilitation) Physician1922180157
- Robert Anderson, MDInternal Medicine Physician1447338538
- May Antonio, PTPhysical Therapist1245553668
Verify Julie M. Nefkens in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G71955Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Occupational Medicine Physician providers in California
There are 415 occupational medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other occupational medicine physician records in California
- Jean Abbe, M.D.San Francisco, CA1316163231
- Belayneh Abejie, MDFresno, CA1831210756
- Rajy Abulhosn, M.D.San Diego, CA1396753703
- Aboaba Afilaka, M.D.Hilmar, CA1184603706
- Taha Ahmad, MDPanorama City, CA1629126669
- Michael Ajao, M.D.San Diego, CA1871798207
- Zaid Al-Faham, M.D., MPHRiverside, CA1871858910
- A. Al-Pachachi, M.D.Vernon, CA1689786790
- Patricia Alexander, O.T.R./LPaso Robles, CA1083612113
- Nima Alipour, D.O.Hawthorne, CA1639300106
Common questions
What is Julie M. Nefkens, MD's NPI number?
Julie M. Nefkens, MD's National Provider Identifier (NPI) is 1417029240, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Julie M. Nefkens, MD located?
The NPPES record lists a practice address at 200 Muir RD, Martinez, CA, 94553. Phone: (925) 372-1000. Providers update this record themselves, so call before visiting.
How can I verify Julie M. Nefkens, MD's license?
NPPES lists California license number G71955, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.