STEVEN MARK SORNSIN MD
NPI 1821056185
Emergency Medicine in Oakland, CA
About Steven Mark Sornsin Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN MARK SORNSIN MD (NPI 1821056185) is an individual emergency medicine provider in Oakland, California, licensed in California (G59897) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Ohio State University College Of Medicine (1983).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Steven Mark Sornsin Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Steven Sornsin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Berkeley, CA 94702
- Reassigned Medicare billing, California enrollment
- 241 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94609 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Steven Sornsin's NPI number?
The NPI number for Steven Sornsin is 1821056185. It was assigned to this individual provider in the NPPES registry on May 3, 2006.
Where is Steven Sornsin located?
Steven Sornsin practices at 350 Hawthorne Avenue, Oakland, CA 94609. The listed phone number is (510) 655-4000.
What is Steven Sornsin's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Steven Sornsin enrolled in Medicare?
Yes. Steven Sornsin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Steven Sornsin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Sornsin reassigns Medicare benefits to Lifelong Medical Care (Berkeley, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Steven Sornsin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Steven Sornsin was last updated on January 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Steven Mark Sornsin, MD · NPI 1821056185
Emergency Medicine physician in Oakland, California. Individual provider, active in the CMS NPPES registry since May 3, 2006.
## Identity
- **NPI:** 1821056185 (Entity type: Individual)
- **Enumerated:** May 3, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** G59897 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 350 HAWTHORNE AVENUE, Oakland, CA 94609-3108
- **Phone:** (510) 655-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Lifelong Medical Care (NPI 1689670002, Berkeley, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio State University College Of Medicine, class of 1983
## Record status
- **NPPES last updated:** January 20, 2026
- **Other identifiers:** Medicaid 00G598970 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1821056185) · Data from the CMS NPPES public registry.