Kathleen Mayer, MD
Internal Medicine Physician · Bakersfield, CA
Kathleen Mayer, MD is an internal medicine physician with a practice address in Bakersfield, California, and NPI 1457488439, issued on Feb 27, 2007. Check the license (California C176095, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Kathleen Mayer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- C176095 CA
37902 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4900 California Ave FL 2, Bakersfield, CA 93309
- Phone
- (617) 505-1520
- Enumerated
- Feb 27, 2007
- Entity
- Type 1 · individual
Also registered at 4900 California Ave FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kathleen Mayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C176095Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
230 internal medicine physician records list a Bakersfield practice address
They are 230 of the 11,539 NPPES records with a Bakersfield practice address, and 20,403 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 230 in Bakersfield → All 20,403 in California → Every provider in Bakersfield →
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 Kathleen Mayer, MD's NPI number?
Kathleen Mayer, MD's National Provider Identifier (NPI) is 1457488439, issued on Feb 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Kathleen Mayer, MD located?
The NPPES record lists a practice address at 4900 California Ave FL 2, Bakersfield, CA, 93309. Phone: (617) 505-1520. Providers update this record themselves, so call before visiting.
How can I verify Kathleen Mayer, MD's license?
NPPES lists California license number C176095, 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), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.