Karen Naomi Kobayashi, D.O.
Obstetrics & Gynecology Physician · Chula Vista, CA
Karen Naomi Kobayashi, D.O. is an obstetrics & gynecology physician with a practice address in Chula Vista, California, and NPI 1497929517, issued on Apr 18, 2008. Check the license (California 20A10831, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Karen Naomi Kobayashi
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 20A10831 CA
036.120496 IL
Self-reported in NPPES; status is on the state search - Practice location
- 751 Medical Center CT, Chula Vista, CA 91911
- Phone
- (619) 502-5800
- Enumerated
- Apr 18, 2008
- Record last updated
- Jan 23, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20180215001863); accepts Medicare assignment
- Medical or professional school
- Nova Southeastern College Of Osteo Medicine, 2005
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 751 Medical Center CT
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Karen Naomi Kobayashi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A10831Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Karen Naomi Kobayashi among 5,088 obstetrics & gynecology physician records in California
Karen Naomi Kobayashi, D.O. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2008, is newer than 62% of them.
- NPI issued2008 · 62% of these records are older, 34% newer
- In a Medicare fileNo · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2005 · median 2004 among the 2,700 with a school on file
- Record last updated2019 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 5,088 in California → Every provider in Chula Vista → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Schubert AtigaChula Vista, CA 919111033138714
- Cristina Flores, MDChula Vista, CA 919111942312996
- Pourang Kamali, M.D.Chula Vista, CA 919111609954171
- Jorge Arce, M.D.Chula Vista, CA 919101245344514
- Azita Aslian, MDChula Vista, CA 919101851667661
- Rick Chac, M.D.Chula Vista, CA 919101538347760
- Kenny Choi, M.D.Chula Vista, CA 919101063481117
- Lesley Nurse, MDChula Vista, CA 919101407865348
Common questions
What is Karen Naomi Kobayashi, D.O.'s NPI number?
Karen Naomi Kobayashi, D.O.'s National Provider Identifier (NPI) is 1497929517, issued on Apr 18, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Karen Naomi Kobayashi, D.O. located?
The NPPES record lists a practice address at 751 Medical Center CT, Chula Vista, CA, 91911. Phone: (619) 502-5800. Providers update this record themselves, so call before visiting.
How can I verify Karen Naomi Kobayashi, D.O.'s license?
NPPES lists California license number 20A10831, 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.