NPPES file of Aug 9, 2026

Krysta Williams, NP

Family Nurse Practitioner · Petaluma, CA

Krysta Williams, NP is a family nurse practitioner with a practice address in Petaluma, California, and NPI 1962184291, issued on Aug 4, 2023. Check the license (California 95026245, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1962184291
Name
Krysta Williams
Credential
NP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
95026245 CA
Self-reported in NPPES; status is on the state search
Practice location
1179 N Mcdowell Blvd, Petaluma, CA 94954
Phone
(707) 559-7500
Enumerated
Aug 4, 2023
Record last updated
Jan 27, 2026
Medicare enrollment
Enrolled (PECOS I20241224000080); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →

Also registered at 1179 N Mcdowell Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Amy Adams, M.D.Emergency Medicine Physician1700976610
  2. Theresa Aguilar, MD, MPHFamily Medicine Physician1205343944
  3. Andrea Akabike, DDSPediatric Dentistry1912512492
  4. Andrew Ashcroft, M.D.Family Medicine Physician1053306795
  5. Miriam Avena-Mascareno, FNP-CFamily Nurse Practitioner1629797246
  6. Yasaman AyatAcupuncturist1174239032

Verify Krysta Williams in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 95026245    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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81% fewer Medicare Part D claims than the average family nurse practitioner in 2024

250 Medicare Part D claims for 129 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.

  1. Krysta Williams250
  2. Specialty average1,305

Most prescribed

  1. Lisinopril14 claims
  2. Atorvastatin Calcium13 claims
  3. Gabapentin11 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Industry payments in 2024: $16.29

1 payment: food and beverage; the largest payer was CooperSurgical, Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Krysta Williams$16.29
  2. Specialty average$650.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Noel Serrano MD PCSan Rafael, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Krysta Williams among 16,966 family nurse practitioner records in California

Krysta Williams, NP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 75% of them.

  • NPI issued2023 · 75% of these records are older, 17% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 40% of these records are
  • Graduated2023 · median 2019 among the 6,793 with a school on file
  • Record last updated2026 · 42% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

50 family nurse practitioner records list a practice address in Petaluma

They are 50 of the 1,856 NPPES records with a practice address in Petaluma, and 16,966 family nurse practitioner records in California.

All 16,966 in California → Every provider in Petaluma → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Julie Anna Bautista, F.N.PPetaluma, CA 949541275547085
  2. Jessica Flinders, FNPPetaluma, CA 949541073769055
  3. Genevieve Foster-Freedman, FNPPetaluma, CA 949541912123787
  4. Donna Geiger, FNPPetaluma, CA 949541245440064
  5. Jessicca Jarrett, FNPPetaluma, CA 949541891911707
  6. Meliea Lane, FNPPetaluma, CA 949541700993334
  7. Teresa Lurie, NPPetaluma, CA 949541245418730
  8. Cheryl Negrin, NPPetaluma, CA 949541558577692

Common questions

What is Krysta Williams, NP's NPI number?

Krysta Williams, NP's National Provider Identifier (NPI) is 1962184291, issued on Aug 4, 2023. An NPI identifies a provider in billing; it is not a license.

Where is Krysta Williams, NP located?

The NPPES record lists a practice address at 1179 N Mcdowell Blvd, Petaluma, CA, 94954. Phone: (707) 559-7500. Providers update this record themselves, so call before visiting.

How can I verify Krysta Williams, NP's license?

NPPES lists California license number 95026245, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

How much does Krysta Williams, NP prescribe under Medicare Part D?

In 2024, Krysta Williams, NP had 250 Medicare Part D claims for 129 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.