Michael Maruska, D.O.
Emergency Medicine Physician · Huntington Beach, CA
Michael Maruska, D.O. is an emergency medicine physician with a practice address in Huntington Beach, California, and NPI 1659669018, issued on Jul 19, 2011. Check the license (California 20A14057, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Michael Maruska
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 20A14057 CA
5101019428 MI
DO2371 NV
34.011750 OH
R4592 TX
Self-reported in NPPES; status is on the state search - Practice location
- 17772 Beach Blvd, Huntington Beach, CA 92647
- Phone
- (714) 843-5000
- Enumerated
- Jul 19, 2011
- Record last updated
- Apr 20, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20160926001014); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 2011
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 17772 Beach Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammad Alwattar, MDEmergency Medicine Physician1770693541
- David Chen, MDEmergency Medicine Physician1588614648
- Emily Grigsby, M.D.Emergency Medicine Physician1861524415
- Jeremy Halbmaier, RNRegistered Nurse1467388314
- Alexander Hannaman, M.D.Emergency Medicine Physician1962426924
- Shokoufeh Hariri, PHARM.DPharmacist1790260156
Verify Michael Maruska in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14057Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average emergency medicine physician in 2024
106 Medicare Part D claims for 81 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin18 claims
- Azithromycin11 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.
Bills Medicare through one group practice
- Beach Emergency Medical AssociatesHuntington Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Michael Maruska among 7,751 emergency medicine physician records in California
Michael Maruska, D.O. 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 2011, is newer than 60% of them.
- NPI issued2011 · 60% of these records are older, 37% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2011 · median 2011 among the 4,560 with a school on file
- Record last updated2018 · 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 Huntington Beach → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Mohammad Alwattar, MDHuntington Beach, CA 926471770693541
- John Broderick, M.D.Huntington Beach, CA 926471588666424
- David Chen, MDHuntington Beach, CA 926471588614648
- Patrick Cichon, MDHuntington Beach, CA 926471144259854
- Gary Flashner, M.D.Huntington Beach, CA 926471437266335
- Alexander Hannaman, M.D.Huntington Beach, CA 926471962426924
- Linda Lee, MDHuntington Beach, CA 926471790797652
- Kha Nguyen, MDHuntington Beach, CA 926471346291440
Common questions
What is Michael Maruska, D.O.'s NPI number?
Michael Maruska, D.O.'s National Provider Identifier (NPI) is 1659669018, issued on Jul 19, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Michael Maruska, D.O. located?
The NPPES record lists a practice address at 17772 Beach Blvd, Huntington Beach, CA, 92647. Phone: (714) 843-5000. Providers update this record themselves, so call before visiting.
How can I verify Michael Maruska, D.O.'s license?
NPPES lists California license number 20A14057, 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 Michael Maruska, D.O. prescribe under Medicare Part D?
In 2024, Michael Maruska, D.O. had 106 Medicare Part D claims for 81 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.