Joseph S. Demattia, P.A.-C
Physician Assistant · Wildomar, CA
Joseph S. Demattia, P.A.-C is a physician assistant with a practice address in Wildomar, California, and NPI 1265547087, issued on Aug 20, 2006. Check the license (California PA13663, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Joseph S. Demattia
- Credential
- P.A.-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA13663 CA
Self-reported in NPPES; status is on the state search - Practice location
- 36485 Inland Valley Dr, Wildomar, CA 92595
- Phone
- (909) 677-9773
- Enumerated
- Aug 20, 2006
- Record last updated
- Oct 30, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
Also registered at 36485 Inland Valley Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jillian Bennett, ACNPEmergency Registered Nurse1306423496
- Jennine Borchert, P.A.-C.Emergency Medicine Physician1912012600
- Lisa Bornmann, P.A.-CPhysician Assistant1083729891
- Terry Cartell, P.T.Physical Therapist1851518385
- A Davila, M.D.Emergency Medicine Physician1508808544
- Winnie Deng, PA-CPhysician Assistant1649932864
Verify Joseph S. Demattia in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA13663Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8.5 times the Medicare Part D claims of the average physician assistant in 2024
7,082 Medicare Part D claims for 873 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 321 claims were for opioids.
Most prescribed
- Ammonium Lactate270 claims
- Triamcinolone Acetonide209 claims
- Amlodipine Besylate203 claims
- Levothyroxine Sodium179 claims
- Atorvastatin Calcium152 claims
- Rosuvastatin Calcium144 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: $1,691.11
80 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
17 physician assistant records list a practice address in Wildomar
They are 17 of the 937 NPPES records with a practice address in Wildomar, and 14,451 physician assistant records in California.
All 17 in Wildomar → All 14,451 in California → Every provider in Wildomar →
Other physician assistant records in California
- Marcia -Galbraith, PAStockton, CA1407143274
- Danny Abad, PAOrange, CA1477158673
- Lea Dominique Abadies, PATustin, CA1124754254
- Rea Elizabeth Abaniel, P.A.-CSeal Beach, CA1396173621
- Ramina Abbasi, PA-CSignal Hill, CA1093448300
- Ariel Abbott, PA-CStockton, CA1780334342
- Barrie Abbott, PA-CAnza, CA1861602575
- Elizabeth Abbott, PA-CSan Diego, CA1437540762
- Terri Abbott, P.A.La Jolla, CA1811165566
- Angela Abboud, MMS, PA-CSanta Rosa, CA1114399334
Common questions
What is Joseph S. Demattia, P.A.-C's NPI number?
Joseph S. Demattia, P.A.-C's National Provider Identifier (NPI) is 1265547087, issued on Aug 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph S. Demattia, P.A.-C located?
The NPPES record lists a practice address at 36485 Inland Valley Dr, Wildomar, CA, 92595. Phone: (909) 677-9773. Providers update this record themselves, so call before visiting.
How can I verify Joseph S. Demattia, P.A.-C's license?
NPPES lists California license number PA13663, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Joseph S. Demattia, P.A.-C prescribe under Medicare Part D?
In 2024, Joseph S. Demattia, P.A.-C had 7,082 Medicare Part D claims for 873 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.