Zeljka Helena Kostich, M.D
Emergency Medicine Physician · Wildomar, CA
Zeljka Helena Kostich, M.D is an emergency medicine physician with a practice address in Wildomar, California, and NPI 1487698114, issued on Jun 15, 2006. Check the license (California A71520, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Zeljka Helena Kostich
- Credential
- M.D
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A71520 CA
Self-reported in NPPES; status is on the state search - Practice location
- 36485 Inland Valley Dr, Wildomar, CA 92595
- Phone
- (951) 677-1111
- Enumerated
- Jun 15, 2006
- Record last updated
- Feb 28, 2024
- Medicare enrollment
- Enrolled (PECOS I20050608000736); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 1993
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 36485 Inland Valley Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jillian Bennett, ACNPEmergency Registered Nurse1306423496
- Jennine Borchert, P.A.-C.Emergency Medicine Physician1912012600
- Lisa Bornmann, P.A.-CPhysician Assistant1083729891
- Terry Cartell, P.T.Physical Therapist1851518385
- A Davila, M.D.Emergency Medicine Physician1508808544
- Joseph Demattia, P.A.-CPhysician Assistant1265547087
Verify Zeljka Helena Kostich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A71520Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% more Medicare Part D claims than the average emergency medicine physician in 2024
288 Medicare Part D claims for 167 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 51 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen38 claims
- Ondansetron Odt30 claims
- Cephalexin26 claims
- Prednisone18 claims
- Albuterol Sulfate Hfa16 claims
- Azithromycin15 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
- EM Alliance California ApcWildomar, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zeljka Helena Kostich among 7,751 emergency medicine physician records in California
Zeljka Helena Kostich, 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 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 fileYes · 59% of these records are
- Graduated1993 · median 2011 among the 4,560 with a school on file
- Record last updated2024 · 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).
11 emergency medicine physician records list a practice address in Wildomar
They are 11 of the 937 NPPES records with a practice address in Wildomar, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Wildomar → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Jennine Borchert, P.A.-C.Wildomar, CA 925951912012600
- A Davila, M.D.Wildomar, CA 925951508808544
- Zeke FosterWildomar, CA 925951881867125
- Bret Ginther, M.D.Wildomar, CA 925951861507626
- Stephen Homan, D.O.Wildomar, CA 925951104976661
- Brent Jacobsen, D.OWildomar, CA 925951790890465
- Steven Kim, M.D.Wildomar, CA 925951134234818
- Christopher Leblanc, MDWildomar, CA 925951922685593
Common questions
What is Zeljka Helena Kostich, M.D's NPI number?
Zeljka Helena Kostich, M.D's National Provider Identifier (NPI) is 1487698114, issued on Jun 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Zeljka Helena Kostich, M.D located?
The NPPES record lists a practice address at 36485 Inland Valley Dr, Wildomar, CA, 92595. Phone: (951) 677-1111. Providers update this record themselves, so call before visiting.
How can I verify Zeljka Helena Kostich, M.D's license?
NPPES lists California license number A71520, 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 Zeljka Helena Kostich, M.D prescribe under Medicare Part D?
In 2024, Zeljka Helena Kostich, M.D had 288 Medicare Part D claims for 167 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.