Joseph Demattia, P.A.-C
NPI 1265547087 · Physician Assistant · Wildomar, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Demattia, P.A.-C is a Physician Assistant provider in Wildomar, CA (NPI 1265547087).
Provider details
- NPI number
- 1265547087
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.-C
- Sex
- Male
- Sole proprietor
- No
- License
- PA13663 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
19 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 153 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ammonium Lactate | 270 | 138 |
| Triamcinolone Acetonide | 209 | 140 |
| Amlodipine Besylate | 203 | 64 |
| Levothyroxine Sodium | 179 | 53 |
| Atorvastatin Calcium | 152 | 50 |
| Rosuvastatin Calcium | 144 | 50 |
| Lisinopril | 129 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,691 across 80 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-20
- Last updated
- 2007-10-30
Frequently asked questions
- What is Joseph Demattia's NPI number?
- Joseph Demattia's National Provider Identifier (NPI) is 1265547087, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Demattia's specialty?
- Joseph Demattia is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Joseph Demattia located?
- Joseph Demattia's practice location on file with NPPES is 36485 Inland Valley Dr, Wildomar, CA 92595-9681.
- What is Joseph Demattia's phone number?
- The practice phone number listed in the NPPES registry for Joseph Demattia is (909) 677-9773.
- Does Joseph Demattia accept Medicare?
- Joseph Demattia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Demattia's NPI active?
- Yes — Joseph Demattia's NPI (1265547087) is active in the NPPES registry as of the last update on 2007-10-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.