Steven Mark Sornsin, MD
Emergency Medicine Physician · Oakland, CA
Steven Mark Sornsin, MD is an emergency medicine physician with a practice address in Oakland, California, and NPI 1821056185, issued on May 3, 2006. Check the license (California G59897, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven Mark Sornsin
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G59897 CA
Self-reported in NPPES; status is on the state search - Practice location
- 350 Hawthorne Avenue, Oakland, CA 94609
- Phone
- (510) 655-4000
- Enumerated
- May 3, 2006
- Record last updated
- Jan 20, 2026
- Medicaid ID
- 00G598970 CA
- Medicare enrollment
- Enrolled (PECOS I20080709000650); accepts Medicare assignment
- Medical or professional school
- Ohio State University College Of Medicine, 1983
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 350 Hawthorne Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ronn Berrol, MDEmergency Medicine Physician1316995889
- John Burke, MDEmergency Medicine Physician1740239953
- Dylan Easley, MDEmergency Medicine Physician1407966260
- Pamela Laesch, MDEmergency Medicine Physician1932167293
- Saloni Patel, PASurgical Physician Assistant1598713067
Verify Steven Mark Sornsin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G59897Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average emergency medicine physician in 2024
137 Medicare Part D claims for 79 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Albuterol Sulfate Hfa11 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): 98.6 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
- Lifelong Medical CareBerkeley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Mark Sornsin among 7,751 emergency medicine physician records in California
Steven Mark Sornsin, 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 fileYes · 59% of these records are
- Graduated1983 · median 2011 among the 4,560 with a school on file
- Record last updated2026 · 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).
247 emergency medicine physician records list a practice address in Oakland
They are 247 of the 18,558 NPPES records with a practice address in Oakland, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Oakland → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Ronn Berrol, MDOakland, CA 946091316995889
- John Burke, MDOakland, CA 946091740239953
- Stephen Chin, MDOakland, CA 946091760458954
- Thomas Dalton, MDOakland, CA 946091336376243
- Christopher Dutra, MDOakland, CA 946091306804661
- Dylan Easley, MDOakland, CA 946091407966260
- Laura Foster, MDOakland, CA 946091609824127
- Robert Golomb, MDOakland, CA 946091831148048
Common questions
What is Steven Mark Sornsin, MD's NPI number?
Steven Mark Sornsin, MD's National Provider Identifier (NPI) is 1821056185, issued on May 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven Mark Sornsin, MD located?
The NPPES record lists a practice address at 350 Hawthorne Avenue, Oakland, CA, 94609. Phone: (510) 655-4000. Providers update this record themselves, so call before visiting.
How can I verify Steven Mark Sornsin, MD's license?
NPPES lists California license number G59897, 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 Steven Mark Sornsin, MD prescribe under Medicare Part D?
In 2024, Steven Mark Sornsin, MD had 137 Medicare Part D claims for 79 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Steven Mark Sornsin, MD's MIPS final score?
The 2023 MIPS final score is 98.6 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.