William C. Inciso, PA-C, PHD
Physician Assistant · San Bernardino, CA
William C. Inciso, PA-C, PHD is a physician assistant with a practice address in San Bernardino, California, and NPI 1407050289, issued on Jun 13, 2007. Check the license (California PA 15861, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William C. Inciso
- Credential
- PA-C, PHD
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA 15861 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2101 N Waterman Ave, San Bernardino, CA 92404
- Phone
- (909) 881-7605
- Enumerated
- Jun 13, 2007
- Record last updated
- Mar 15, 2022
- Medicare enrollment
- Enrolled (PECOS I20141015001467); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 2101 N Waterman Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William C. Inciso in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA 15861Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% more Medicare Part D claims than the average physician assistant in 2024
1,570 Medicare Part D claims for 334 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 37 claims were for opioids.
Most prescribed
- Atorvastatin Calcium87 claims
- Azithromycin73 claims
- Metformin Hcl73 claims
- Amlodipine Besylate61 claims
- Albuterol Sulfate Hfa55 claims
- Losartan Potassium50 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.
Bills Medicare through one group practice
- May Medical Management CorporationLa Verne, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William C. Inciso among 14,451 physician assistant records in California
William C. Inciso, PA-C, PHD is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 13% of them.
- NPI issued2007 · 13% of these records are older, 78% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2000 · median 2018 among the 7,214 with a school on file
- Record last updated2022 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
83 physician assistant records list a practice address in San Bernardino
They are 83 of the 5,645 NPPES records with a practice address in San Bernardino, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Bernardino → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Silvia Barr, PA-CSan Bernardino, CA 924041245602259
- Brian Benson, PA-CSan Bernardino, CA 924041700943107
- William Boyle, PA-CSan Bernardino, CA 924041124053715
- Raymond Cervenka, PASan Bernardino, CA 924041497965529
- Deval Dave, PASan Bernardino, CA 924041013220458
- Amber Janson, PA-CSan Bernardino, CA 924041750753141
- Billy Kim, PA-CSan Bernardino, CA 924041285973859
- Gregory Mitchell, PA-CSan Bernardino, CA 924041477636496
Common questions
What is William C. Inciso, PA-C, PHD's NPI number?
William C. Inciso, PA-C, PHD's National Provider Identifier (NPI) is 1407050289, issued on Jun 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William C. Inciso, PA-C, PHD located?
The NPPES record lists a practice address at 2101 N Waterman Ave, San Bernardino, CA, 92404. Phone: (909) 881-7605. Providers update this record themselves, so call before visiting.
How can I verify William C. Inciso, PA-C, PHD's license?
NPPES lists California license number PA 15861, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William C. Inciso, PA-C, PHD prescribe under Medicare Part D?
In 2024, William C. Inciso, PA-C, PHD had 1,570 Medicare Part D claims for 334 beneficiaries; the average among physician assistant prescribers was 830. 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.