DR. JAMES M. SONNER MD
NPI 1508819400
Anesthesiology in San Francisco, CA
About Dr. James M. Sonner Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAMES M. SONNER MD (NPI 1508819400) is an individual anesthesiology provider in San Francisco, California, licensed in California (G67923) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. James M. Sonner Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
5Medicare enrollment records show James Sonner reassigns Medicare billing to 5 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
Los Angeles, CA 90048
- Reassigned Medicare billing, California enrollment
- 2,118 clinicians in this Medicare group
Pasadena, CA 91105
- Reassigned Medicare billing, California enrollment
- 214 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.
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 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 James Sonner's NPI number?
The NPI number for James Sonner is 1508819400. It was assigned to this individual provider in the NPPES registry on May 19, 2006.
Where is James Sonner located?
James Sonner practices at 505 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 476-2131.
What is James Sonner's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is James Sonner enrolled in Medicare?
Yes. James Sonner is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for James Sonner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Sonner reassigns Medicare benefits to 5 organizations: University Anesthesia Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), Cedars-Sinai Medical Care Foundation (Los Angeles, CA) and Pacific Valley Medical Group (Pasadena, 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 James Sonner'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 James Sonner was last updated on May 18, 2016. 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.
# Dr. James M. Sonner, MD · NPI 1508819400
Anesthesiology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since May 19, 2006.
## Identity
- **NPI:** 1508819400 (Entity type: Individual)
- **Enumerated:** May 19, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** G67923 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 505 PARNASSUS AVE, San Francisco, CA 94143-2204
- **Phone:** (415) 476-2131 · **Fax:** (415) 476-9516
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for durable medical equipment, power mobility devices
- **Bills Medicare through:** 5 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); Cedars-Sinai Medical Care Foundation (NPI 1043826720, Los Angeles, CA); Pacific Valley Medical Group (NPI 1851312862, Pasadena, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 18, 2016
- **Other identifiers:** Medicare UPIN F28156 (CA); Medicaid 00G679230 (CA); Medicare PIN 00G679230 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1508819400) · Data from the CMS NPPES public registry.