Kevin S. Ernsting, MD
Emergency Medicine Physician · San Jose, CA
Kevin S. Ernsting, MD is an emergency medicine physician with a practice address in San Jose, California, and NPI 1518043025, issued on Oct 27, 2006. Check the license (California A74128, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kevin S. Ernsting
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A74128 CA
Self-reported in NPPES; status is on the state search - Practice location
- 260 International Cir, San Jose, CA 95119
- Phone
- (408) 972-7000
- Enumerated
- Oct 27, 2006
- Record last updated
- Dec 22, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00A741280 CA
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 260 International Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Kevin S. Ernsting in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A74128Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
23% fewer Medicare Part D claims than the average emergency medicine physician in 2024
174 Medicare Part D claims for 141 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 18 claims were for opioids.
Most prescribed
- Cefadroxil36 claims
- Hydrocodone-Acetaminophen12 claims
- Prednisone12 claims
- Amoxicillin-Clavulanate Potass11 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.
Kevin S. Ernsting among 7,751 emergency medicine physician records in California
Kevin S. Ernsting, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in San Jose → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Lisa Hung, DOSan Jose, CA 951191942386453
- Chandu Karadi, MDSan Jose, CA 951191851477368
- Ryan Kime, MDSan Jose, CA 951191184700692
- Charles Kutner, MDSan Jose, CA 951191083790596
- Walter Kwan, M.D.San Jose, CA 951191174635155
- Joseph Lago, MDSan Jose, CA 951191144306671
- Angela Loh, MDSan Jose, CA 951191275611774
- Hien Nguyen, MDSan Jose, CA 951191740366269
Common questions
What is Kevin S. Ernsting, MD's NPI number?
Kevin S. Ernsting, MD's National Provider Identifier (NPI) is 1518043025, issued on Oct 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kevin S. Ernsting, MD located?
The NPPES record lists a practice address at 260 International Cir, San Jose, CA, 95119. Phone: (408) 972-7000. Providers update this record themselves, so call before visiting.
How can I verify Kevin S. Ernsting, MD's license?
NPPES lists California license number A74128, 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 Kevin S. Ernsting, MD prescribe under Medicare Part D?
In 2024, Kevin S. Ernsting, MD had 174 Medicare Part D claims for 141 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.