STEPHEN DWIGHT WESTON M.D.
NPI 1184933418
Anesthesiology in San Francisco, CA
About Stephen Dwight Weston M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEPHEN DWIGHT WESTON M.D. (NPI 1184933418) is an individual anesthesiology provider in San Francisco, California, licensed in California (121350) and active in the NPI registry since October 2010. He is enrolled in Medicare PECOS and is a graduate of University Of California, San Diego School Of Medicine (2010).
NPPES Registry Identity
Specialties & Licenses
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
Stephen Dwight Weston M.d. 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 Reassignments
3Medicare enrollment records show Stephen Weston reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 723 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Stephen Weston's NPI number?
The NPI number for Stephen Weston is 1184933418. It was assigned to this individual provider in the NPPES registry on October 5, 2010.
Where is Stephen Weston located?
Stephen Weston practices at 505 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 514-2999.
What is Stephen Weston's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Stephen Weston enrolled in Medicare?
Yes. Stephen Weston 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 organizations bill Medicare for Stephen Weston's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Weston reassigns Medicare benefits to 3 organizations: University Anesthesia Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). Each 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 Stephen Weston'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 Stephen Weston was last updated on December 28, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.
# Stephen Dwight Weston, M.D. · NPI 1184933418
Anesthesiology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since October 5, 2010.
## Identity
- **NPI:** 1184933418 (Entity type: Individual)
- **Enumerated:** October 5, 2010
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 121350 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 505 PARNASSUS AVE, San Francisco, CA 94143-2204
- **Phone:** (415) 514-2999
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): University Anesthesia Medical Group (NPI 1528137296, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Diego School Of Medicine, class of 2010
## Record status
- **NPPES last updated:** December 28, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1184933418) · Data from the CMS NPPES public registry.