Ethan Kunstadt, M.D.
Emergency Medicine Physician · Irvine, CA
Ethan Kunstadt, M.D. is an emergency medicine physician with a practice address in Irvine, California, and NPI 1992167993, issued on Mar 28, 2016. Check the license (California A152429, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ethan Kunstadt
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A152429 CA
Self-reported in NPPES; status is on the state search - Practice location
- 16200 Sand Canyon Ave, Irvine, CA 92618
- Phone
- (949) 764-4624
- Enumerated
- Mar 28, 2016
- Record last updated
- Jan 27, 2023
- Medicare enrollment
- Enrolled (PECOS I20191024002095); accepts Medicare assignment
- Medical or professional school
- University Of Alabama School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 16200 Sand Canyon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christine AyalaNurse Practitioner1831879154
- Nicholas Bove, MDEmergency Medicine Physician1255837837
- David Calica, M.D.Anesthesiology Physician1780787606
- Danielle CarlsonRegistered Nurse1710850409
- John Chien, M.D.Hospitalist Physician1790043651
- Michael Cho, M.D.Hospitalist Physician1184915001
Verify Ethan Kunstadt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A152429Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% more Medicare Part D claims than the average emergency medicine physician in 2024
369 Medicare Part D claims for 232 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. 37 claims were for opioids.
Most prescribed
- Cefpodoxime Proxetil25 claims
- Ondansetron Odt25 claims
- Meclizine Hcl23 claims
- Cefdinir21 claims
- Oxycodone-Acetaminophen21 claims
- Prednisone20 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Emergency Physicians OF Orange CountyNewport Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ethan Kunstadt among 7,751 emergency medicine physician records in California
Ethan Kunstadt, M.D. 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 2016, is newer than 75% of them.
- NPI issued2016 · 75% of these records are older, 22% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2016 · median 2011 among the 4,560 with a school on file
- Record last updated2023 · 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 Irvine → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Nicholas Bove, MDIrvine, CA 926181255837837
- Ahmed Elrefaie, M.D.Irvine, CA 926181578820155
- Stephen Gau, M.D.Irvine, CA 926181942640354
- Ryan Hurd, M.D.Irvine, CA 926181255377156
- Cong LyIrvine, CA 926181649456682
- Cassondra Majestic, M.D.Irvine, CA 926181538501705
- Peter Nguyen, D.O.Irvine, CA 926181871933366
- Karin Reed, M.D.Irvine, CA 926181649560913
Common questions
What is Ethan Kunstadt, M.D.'s NPI number?
Ethan Kunstadt, M.D.'s National Provider Identifier (NPI) is 1992167993, issued on Mar 28, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Ethan Kunstadt, M.D. located?
The NPPES record lists a practice address at 16200 Sand Canyon Ave, Irvine, CA, 92618. Phone: (949) 764-4624. Providers update this record themselves, so call before visiting.
How can I verify Ethan Kunstadt, M.D.'s license?
NPPES lists California license number A152429, 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 Ethan Kunstadt, M.D. prescribe under Medicare Part D?
In 2024, Ethan Kunstadt, M.D. had 369 Medicare Part D claims for 232 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Ethan Kunstadt, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.