Krysta Williams, NP
Family Nurse Practitioner · Petaluma, CA
At a glance
1179 N Mcdowell Blvd, Petaluma, CA 94954-6559
NPPES record updated Jan 27, 2026. 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
1179 N Mcdowell BlvdPetaluma, CA 94954-6559
Additional reported practice locations
450 Hayes LnPetaluma, CA 949524010
Phone: 7075359279 446 Arrowood Dr
Santa Rosa, CA 954077503
Phone: 7075359279 300 Fountaingrove Pkwy
Santa Rosa, CA 954035720
Phone: 7075359279 850 Sonoma Ave
Santa Rosa, CA 954044715
Phone: 7075359279 260 Hospital Dr
Ukiah, CA 954824568
Phone: 7075359279 3275 Villa Ln
Napa, CA 945583016
Phone: 7075359279 1250 Broadway
Sonoma, CA 954767500
Phone: 7075359279 40 Professional Center Pkwy
San Rafael, CA 949032703
Phone: 7075359279 45 Professional Center Pkwy
San Rafael, CA 949032702
Phone: 7075359279 705 Trancas St
Napa, CA 945583014
Phone: 7075359279 300 Cherry Creek Rd
Cloverdale, CA 954253811
Phone: 7075359279 347 Andrieux St
Sonoma, CA 954766811
Phone: 7075359279 1044 Heartwood Ave
Vallejo, CA 945915637
Phone: 7075359279 523 Hayes Ln
Petaluma, CA 949524011
Phone: 7075359279 300 Douglas St
Petaluma, CA 949522503
Phone: 7075359279 1035 Hwy 116 S
Sebastopol, CA 954724865
Phone: 7075359279 1527 Springs Rd
Vallejo, CA 945915448
Phone: 7075359279
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2023
- CMS specialties
- Nurse Practitioner
Practice groups
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.
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 Nurse Practitioner
- Taxonomy code
- 363LF0000X
- Enumeration date
- Aug 4, 2023
- Record updated
- Jan 27, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- NP
Reported taxonomies and licenses
363LF0000X · Primary
License reported: 95026245 CA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
1179 N Mcdowell BlvdPetaluma, CA 94954-6559
- Phone
- (707) 559-7500
Mailing address
PO BOX 16309JACKSONVILLE, FL 322456309
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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