Gary L. Kobayashi, M.D.
Internal Medicine Physician · Vista, CA
Gary L. Kobayashi, M.D. is an internal medicine physician with a practice address in Vista, California, and NPI 1245303353, issued on Nov 16, 2006. Check the license (California G58496, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary L. Kobayashi
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G58496 CA
Self-reported in NPPES; status is on the state search - Practice location
- 145 Thunder Dr, Vista, CA 92083
- Phone
- (760) 630-5464
- Enumerated
- Nov 16, 2006
- Record last updated
- Feb 4, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (760) 630-5476
- Medicaid ID
- 00G584960 CA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 145 Thunder Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Talia Adams, PA-CPhysician Assistant1790166858
- Robert Barron, MDFamily Medicine Physician1477626984
- Leo Best, PA-CPhysician Assistant1376723437
- Lily Caesar, P.A.Physician Assistant1518184266
- Erinn Degracia, FNPFamily Nurse Practitioner1043729825
- Sean Easton, PAPhysician Assistant1790284131
Verify Gary L. Kobayashi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G58496Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,791 Medicare Part D claims for 553 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 270 claims were for opioids.
Most prescribed
- Atorvastatin Calcium480 claims
- Amlodipine Besylate362 claims
- Lisinopril288 claims
- Losartan Potassium227 claims
- Levothyroxine Sodium221 claims
- Metformin Hcl204 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.
Gary L. Kobayashi among 17,696 internal medicine physician records in California
Gary L. Kobayashi, M.D. 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2015 · 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).
43 internal medicine physician records list a practice address in Vista
They are 43 of the 2,017 NPPES records with a practice address in Vista, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Vista → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Emad Abu-Khieran, MDVista, CA 920831558314237
- Kristin Bell, M.D.Vista, CA 920831154335891
- Sanjana Chaturvedi, MDVista, CA 920831881630457
- Farzaneh Hassani, MDVista, CA 920831942204979
- John Lafata, MDVista, CA 920831285662403
- Kiran Mahl-Sansone, M.D., INC.Vista, CA 920831245276815
- Mark O'Brien, D.O.Vista, CA 920831497744247
- Gerald Ondash, MDVista, CA 920831730102153
Common questions
What is Gary L. Kobayashi, M.D.'s NPI number?
Gary L. Kobayashi, M.D.'s National Provider Identifier (NPI) is 1245303353, issued on Nov 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary L. Kobayashi, M.D. located?
The NPPES record lists a practice address at 145 Thunder Dr, Vista, CA, 92083. Phone: (760) 630-5464. Providers update this record themselves, so call before visiting.
How can I verify Gary L. Kobayashi, M.D.'s license?
NPPES lists California license number G58496, 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 Gary L. Kobayashi, M.D. prescribe under Medicare Part D?
In 2024, Gary L. Kobayashi, M.D. had 6,791 Medicare Part D claims for 553 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.