Steve James Zielinski, D.O.
Emergency Medicine Physician · Lakewood, CA
Steve James Zielinski, D.O. is an emergency medicine physician with a practice address in Lakewood, California, and NPI 1063544849, issued on Mar 9, 2007. Check the license (California 20A9186, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steve James Zielinski
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 20A9186 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3700 South St, Lakewood, CA 90712
- Phone
- (562) 602-6800
- Enumerated
- Mar 9, 2007
- Record last updated
- Dec 2, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20071128000544); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 3700 South St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Omowunmi Ajibola, MDVascular & Interventional Radiology Physician1699157396
- Kristin Bagiu, LM, RN, NP-CNurse Practitioner1023137403
- Alfonso Castellucci, DOEmergency Medicine Physician1821187717
- James Chapman, DOEmergency Medicine Physician1689606790
- Marvin Fields, M.D.Diagnostic Radiology Physician1063461333
- Omran Gdara, MDEmergency Medicine Physician1013658947
Verify Steve James Zielinski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9186Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% more Medicare Part D claims than the average emergency medicine physician in 2024
309 Medicare Part D claims for 171 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 30 claims were for opioids.
Most prescribed
- Prednisone38 claims
- Hydrocodone-Acetaminophen30 claims
- Ondansetron Odt30 claims
- Cephalexin27 claims
- Ondansetron Hcl27 claims
- Albuterol Sulfate Hfa15 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.6 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Cep America - CaliforniaRoseville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steve James Zielinski among 7,751 emergency medicine physician records in California
Steve James Zielinski, 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 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2002 · median 2011 among the 4,560 with a school on file
- Record last updated2013 · 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 Lakewood → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Alfonso Castellucci, DOLakewood, CA 907121821187717
- James Chapman, DOLakewood, CA 907121689606790
- Omran Gdara, MDLakewood, CA 907121013658947
- Norman Jetton, MDLakewood, CA 907121073542924
- Robert Padgett, MDLakewood, CA 907121760404537
- Monica Serna, MDLakewood, CA 907121114956976
- Constantine Svimonoff, MDLakewood, CA 907121649209404
- Russell Brutscher, MDHarbor City, CA 907101750439626
Common questions
What is Steve James Zielinski, D.O.'s NPI number?
Steve James Zielinski, D.O.'s National Provider Identifier (NPI) is 1063544849, issued on Mar 9, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Steve James Zielinski, D.O. located?
The NPPES record lists a practice address at 3700 South St, Lakewood, CA, 90712. Phone: (562) 602-6800. Providers update this record themselves, so call before visiting.
How can I verify Steve James Zielinski, D.O.'s license?
NPPES lists California license number 20A9186, 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 Steve James Zielinski, D.O. prescribe under Medicare Part D?
In 2024, Steve James Zielinski, D.O. had 309 Medicare Part D claims for 171 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Steve James Zielinski, D.O.'s MIPS final score?
The 2023 MIPS final score is 80.6 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.