William Joseph Johncox, P.A.
Medical Physician Assistant · Fresno, CA
William Joseph Johncox, P.A. is a medical physician assistant with a practice address in Fresno, California, and NPI 1023124278, issued on Aug 21, 2006. Check the license (California 13919, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Joseph Johncox
- Credential
- P.A.
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 13919 CA
Self-reported in NPPES; status is on the state search - Practice location
- 7152 N Sharon Ave Ste 102, Fresno, CA 93720
- Phone
- (559) 432-6807
- Enumerated
- Aug 21, 2006
- Record last updated
- Oct 27, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (559) 432-6937
- Medicare enrollment
- Enrolled (PECOS I20061005000609); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 3,376 in California → Look up another NPI →
Also registered at 7152 N Sharon Ave Ste 102
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Cayla Witrado, PA-CPhysician Assistant1790300721
Verify William Joseph Johncox in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 13919Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.8 times the Medicare Part D claims of the average medical physician assistant in 2024
4,384 Medicare Part D claims for 696 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 3,495 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen1,841 claims
- Methadone Hcl338 claims
- Oxycodone-Acetaminophen297 claims
- Tramadol Hcl268 claims
- Tizanidine Hcl253 claims
- Gabapentin197 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: $270.38
8 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, 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.
Bills Medicare through one group practice
- Robert G Salazar MD IncFresno, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Joseph Johncox among 3,376 medical physician assistant records in California
William Joseph Johncox, P.A. 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 2006, is newer than 2% of them.
- NPI issued2006 · 2% of these records are older, 80% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated1997 · median 2012 among the 1,347 with a school on file
- Record last updated2021 · 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 Fresno → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Courtney Eastman, PA-CFresno, CA 937201073873741
- Samantha Gallo, P.A.Fresno, CA 937201114574084
- Jennifer Gault, PACFresno, CA 937201144319278
- Heather Gerrish, PAFresno, CA 937201508345430
- Michael Ginsberg, P.A.Fresno, CA 937201649276619
- Doris Gordy, P.A.Fresno, CA 937201083636138
- Tonia Hendrix, P.A.-CFresno, CA 937201114940657
- April Herd, PA-CFresno, CA 937201811093826
Common questions
What is William Joseph Johncox, P.A.'s NPI number?
William Joseph Johncox, P.A.'s National Provider Identifier (NPI) is 1023124278, issued on Aug 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Joseph Johncox, P.A. located?
The NPPES record lists a practice address at 7152 N Sharon Ave Ste 102, Fresno, CA, 93720. Phone: (559) 432-6807. Providers update this record themselves, so call before visiting.
How can I verify William Joseph Johncox, P.A.'s license?
NPPES lists California license number 13919, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Joseph Johncox, P.A. prescribe under Medicare Part D?
In 2024, William Joseph Johncox, P.A. had 4,384 Medicare Part D claims for 696 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.