Nolan Williams
NPI 1811339641 · Psychiatry Physician · Napa, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nolan Williams is a Psychiatry Physician provider in Napa, CA (NPI 1811339641).
Provider details
- NPI number
- 1811339641
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- A159440 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
12 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- 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.
$163 across 2 records (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
Additional practice locations (1)
- 200 Hillmont AveVentura, CA 93003-1647Phone: (805) 652-6729
Registry dates
- Enumerated
- 2013-07-22
- Last updated
- 2025-11-17
- Certified
- 2025-11-17
Frequently asked questions
- What is Nolan Williams's NPI number?
- Nolan Williams's National Provider Identifier (NPI) is 1811339641, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nolan Williams's specialty?
- Nolan Williams is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Nolan Williams located?
- Nolan Williams's practice location on file with NPPES is 1580 1st St, Napa, CA 94559-2841.
- What is Nolan Williams's phone number?
- The practice phone number listed in the NPPES registry for Nolan Williams is (707) 258-8757.
- Does Nolan Williams accept Medicare?
- Nolan Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nolan Williams's NPI active?
- Yes — Nolan Williams's NPI (1811339641) is active in the NPPES registry as of the last update on 2025-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.