Sara Williams, PHD
NPI 1285934455 · Pain Medicine (Anesthesiology) Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sara Williams, PHD is a Pain Medicine (Anesthesiology) Physician provider in Palo Alto, CA (NPI 1285934455).
Provider details
- NPI number
- 1285934455
- Entity type
- Individual
- Primary specialty
- Pain Medicine (Anesthesiology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- No
- License
- PSY34162 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
15 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$20 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-10-22
- Last updated
- 2024-04-11
- Certified
- 2024-04-11
Frequently asked questions
- What is Sara Williams's NPI number?
- Sara Williams's National Provider Identifier (NPI) is 1285934455, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sara Williams's specialty?
- Sara Williams is listed in the NPPES registry with a primary specialty of Pain Medicine (Anesthesiology) Physician (Allopathic & Osteopathic Physicians).
- Where is Sara Williams located?
- Sara Williams's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Sara Williams's phone number?
- The practice phone number listed in the NPPES registry for Sara Williams is (650) 497-8000.
- Does Sara Williams accept Medicare?
- Sara Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sara Williams's NPI active?
- Yes — Sara Williams's NPI (1285934455) is active in the NPPES registry as of the last update on 2024-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.