Lauren Williams, PA-C
Medical Physician Assistant · Petaluma, CA
Lauren Williams, PA-C is a medical physician assistant with a practice address in Petaluma, California, and NPI 1437563624, issued on Jun 16, 2014. Check the license (California 51649, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Lauren Williams
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 51649 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
- Jun 16, 2014
- Record last updated
- Sep 20, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (707) 559-7620
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 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.
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Verify Lauren Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 51649Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% more Medicare Part D claims than the average medical physician assistant in 2024
1,925 Medicare Part D claims for 793 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 79 claims were for opioids.
Most prescribed
- Atorvastatin Calcium88 claims
- Lisinopril70 claims
- Gabapentin59 claims
- Amlodipine Besylate48 claims
- Levothyroxine Sodium46 claims
- Ozempic43 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: $22.65
1 payment: food and beverage; the largest payer was Novo Nordisk Inc. The 16,165 providers of this specialty with any payment received $1,055.00 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Lauren Williams among 3,376 medical physician assistant records in California
Lauren Williams, PA-C is one of 3,376 medical physician assistant records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 58% of them.
- NPI issued2014 · 58% of these records are older, 38% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2019 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
All 3,376 in California → Every provider in Petaluma → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Nicole Daoud, PA-CPetaluma, CA 949541174999122
- Erin Hanauer, PA-CPetaluma, CA 949541851490718
- Ann Mendenhall, PA-CPoint Reyes Station, CA 949561316320682
- Mollie Moore, PA-C, MSPAS, MPHNovato, CA 949491144669938
- Mark Larroque, P.A.Novato, CA 949451396143855
- Michael RomeroNovato, CA 949451427673656
- Ashley Burnett, PA-CMill Valley, CA 949411265118350
- Laura Sasso, PA-CMill Valley, CA 949411386186302
Common questions
What is Lauren Williams, PA-C's NPI number?
Lauren Williams, PA-C's National Provider Identifier (NPI) is 1437563624, issued on Jun 16, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Lauren Williams, PA-C 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 Lauren Williams, PA-C's license?
NPPES lists California license number 51649, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Lauren Williams, PA-C prescribe under Medicare Part D?
In 2024, Lauren Williams, PA-C had 1,925 Medicare Part D claims for 793 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.
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.