ALANNA BRIDGET WILLIAMS
NPI 1407505613
Internal Medicine in San Francisco, CA
About Alanna Bridget Williams NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALANNA BRIDGET WILLIAMS (NPI 1407505613) is an individual internal medicine provider in San Francisco, California, licensed in California (A189898) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS and is a graduate of Washington University School Of Medicine (2022).
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Alanna Bridget Williams 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Alanna Williams's NPI number?
The NPI number for Alanna Williams is 1407505613. It was assigned to this individual provider in the NPPES registry on March 23, 2022.
Where is Alanna Williams located?
Alanna Williams practices at 521 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 476-1000.
What is Alanna Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Alanna Williams enrolled in Medicare?
Yes. Alanna Williams 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.
When was this NPI record last updated?
The NPPES record for Alanna Williams was last updated on April 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Alanna Bridget Williams · NPI 1407505613
Internal Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since March 23, 2022.
## Identity
- **NPI:** 1407505613 (Entity type: Individual)
- **Enumerated:** March 23, 2022
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A189898 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 521 PARNASSUS AVE, San Francisco, CA 94143-2206
- **Phone:** (415) 476-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Washington University School Of Medicine, class of 2022
## Record status
- **NPPES last updated:** April 24, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1407505613) · Data from the CMS NPPES public registry.