John Keith Weixler, NP
Psychiatric/Mental Health Nurse Practitioner · Fairfield, CA
John Keith Weixler, NP is a psychiatric/mental health nurse practitioner with a practice address in Fairfield, California, and NPI 1699438820, issued on Oct 14, 2021. Check the license (California 95018841, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Keith Weixler
- Credential
- NP
- Primary taxonomy
- Psychiatric/Mental Health Nurse Practitioner 363LP0808X
- License number
- 95018841 CA
Self-reported in NPPES; status is on the state search - Practice location
- 470 Chadbourne RD Ste A, Fairfield, CA 94534
- Phone
- (707) 419-8989
- Enumerated
- Oct 14, 2021
- Record last updated
- Sep 4, 2025
- Entity
- Type 1 · individual
8 nearest psychiatric/mental health nurse practitioner records → All 4,226 in California → Look up another NPI →
Also registered at 470 Chadbourne RD Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mara Adelman, PHYSICIANS ASST PAPhysician Assistant1124053483
- Wanda Avila, ASWClinical Social Worker1811694599
- Renee BassettClinical Social Worker1124623236
- Janina Mae Bernas, RDRegistered Dietitian1811465800
- Jason Booth, MDFamily Medicine Physician1215236443
- Yvette BravoSocial Worker1881042547
Verify John Keith Weixler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95018841Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% fewer Medicare Part D claims than the average psychiatric/mental health nurse practitioner in 2024
870 Medicare Part D claims for 92 beneficiaries, against an average of 906 among the 30,717 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Bupropion Xl72 claims
- Quetiapine Fumarate62 claims
- Duloxetine Hcl57 claims
- Sertraline Hcl56 claims
- Lamotrigine44 claims
- Trazodone Hcl41 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.
John Keith Weixler among 4,226 psychiatric/mental health nurse practitioner records in California
John Keith Weixler, NP is one of 4,226 psychiatric/mental health nurse practitioner records with a practice address in California. 62% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 46% of them.
- NPI issued2021 · 46% of these records are older, 46% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileNo · 46% of these records are
- Record last updated2025 · 16% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LP0808X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatric/Mental Health Nurse Practitioner providers in California
There are 4,226 psychiatric/mental health nurse practitioner records in California.
All 4,226 in California → Every provider in Fairfield → Psychiatric/Mental Health Nurse Practitioner nationwide →
The 8 psychiatric/mental health nurse practitioner records with the nearest ZIP codes
- Joseph Bielefeld, PMHNP-BC/FNPFairfield, CA 945341124639943
- Kari CorderoFairfield, CA 945341982913489
- Joaleen Johnson, RN, PMHNPFairfield, CA 945341326549858
- Jamie Johnson, RN, PMHNP-BCFairfield, CA 945341215583919
- Hamdat OwohaFairfield, CA 945341487527842
- Christine Aye, RNFairfield, CA 945331194601716
- Lauren Carrizosa, NPFairfield, CA 945331013463827
- Sharon Figueroa, PMHNP-BCFairfield, CA 945331417476680
Common questions
What is John Keith Weixler, NP's NPI number?
John Keith Weixler, NP's National Provider Identifier (NPI) is 1699438820, issued on Oct 14, 2021. An NPI identifies a provider in billing; it is not a license.
Where is John Keith Weixler, NP located?
The NPPES record lists a practice address at 470 Chadbourne RD Ste A, Fairfield, CA, 94534. Phone: (707) 419-8989. Providers update this record themselves, so call before visiting.
How can I verify John Keith Weixler, NP's license?
NPPES lists California license number 95018841, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John Keith Weixler, NP prescribe under Medicare Part D?
In 2024, John Keith Weixler, NP had 870 Medicare Part D claims for 92 beneficiaries; the average among psychiatric/mental health nurse practitioner prescribers was 906. 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.