ALEXANDER JAMES BUTWICK MD
NPI 1629119888
Anesthesiology in San Francisco, CA
About Alexander James Butwick Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALEXANDER JAMES BUTWICK MD (NPI 1629119888) is an individual anesthesiology provider in San Francisco, California, licensed in California (A105781) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (1997).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Alexander James Butwick 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 Reassignments
3Medicare enrollment records show Alexander Butwick 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.
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
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 Alexander Butwick's NPI number?
The NPI number for Alexander Butwick is 1629119888. It was assigned to this individual provider in the NPPES registry on February 9, 2007.
Where is Alexander Butwick located?
Alexander Butwick practices at 521 Parnassus Ave Fl 4, San Francisco, CA 94143. The listed phone number is (415) 476-9035.
What is Alexander Butwick's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Alexander Butwick enrolled in Medicare?
Yes. Alexander Butwick 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 Alexander Butwick's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Butwick 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 Alexander Butwick'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 Alexander Butwick was last updated on September 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Alexander James Butwick, MD · NPI 1629119888
Anesthesiology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since February 9, 2007.
## Identity
- **NPI:** 1629119888 (Entity type: Individual)
- **Enumerated:** February 9, 2007
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A105781 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 521 PARNASSUS AVE FL 4, San Francisco, CA 94143-2206
- **Phone:** (415) 476-9035 · **Fax:** (415) 353-9163
## 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:** Other, class of 1997
## Record status
- **NPPES last updated:** September 18, 2024
- **Other identifiers:** Medicaid 00F53660 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1629119888) · Data from the CMS NPPES public registry.