Peter N. Mattar, MD
NPI 1417005422ActiveIndividual· Family Medicine· Fontana, CA
Family Medicine (MD) in Fontana, California, trained at Loma Linda University School of Medicine (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $1,178,095 for 6,428 claims, against $13,990 paid for services in 2024. Lilly USA, LLC was the largest of 8 companies reporting payments in 2025, $392.79 in all, mostly food and beverage.
Overview
| NPI | 1417005422 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 8, 2007 |
| Last updated in NPPES | Sep 23, 2024 |
| Certified by provider | Sep 23, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | A97235 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 96 |
|---|---|
| Services billed | 207 across 22 procedure codes |
| Paid by Medicare | $13,990 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,428 · 12,647 30-day fills |
|---|---|
| Patients | 600 |
| Total drug cost | $1,178,095 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical groups
- Citrus Valley Medical Associates IncCorona, CA · 14 clinicians
- Platinum Providers Medical Group IncRiverside, CA · 3 clinicians
Other facilities
- Aviva Hospice IncHospice · Redlands, CA
- Lady of Joy Hospice, IncHospice · Montclair, CA
- Mary of Joy Hospice, Inc.Hospice · Montclair, CA
Industry payments (Open Payments)
- 2025$392.79 · 18 payments from 8 companies
- 2024$349.01 · 12 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $102.56 | 4 |
| Novo Nordisk Inc | $72.30 | 3 |
| Dexcom, Inc. | $62.64 | 3 |
| Glaxosmithkline, LLC. | $49.91 | 2 |
| Abbvie Inc. | $43.52 | 2 |
What the 2025 payments were for
- Food and Beverage$392.79 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 225 family medicine physicians in Fontana · All family medicine physicians in California