Lawrence James Williamson, M.D.
Family Medicine · Windsor, CA
At a glance
911 Medical Center Plaza, Windsor, CA 95492-7817
NPPES record updated May 4, 2010. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
911 Medical Center Plaza Suite 23Windsor, CA 95492-7817
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 1997
- CMS specialties
- General Practice
Practice groups
Reported hospital affiliations
- Coalinga Regional Medical Center Coalinga, CA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Family Medicine
- Taxonomy code
- 207Q00000X
- Enumeration date
- Apr 18, 2006
- Record updated
- May 4, 2010
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207Q00000X · Primary
License reported: A73495 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
911 Medical Center PlazaSuite 23
Windsor, CA 95492-7817
- Phone
- (707) 837-0170
- Fax
- (707) 837-0177
Mailing address
PO BOX 1820WINDSOR, CA 954921820
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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