Jonathan A. Rosaasen, M.D.
NPI 1528171352ActiveIndividual· Family Medicine· Thousand Oaks, CA
Family Medicine (M.D.) in Thousand Oaks, California, trained at Loma Linda University School of Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $215,484 for 2,147 claims, against $75,528 paid for services in 2024. Abbvie Inc. was the largest of 11 companies reporting payments in 2025, $1,259 in all, mostly food and beverage.
Overview
| NPI | 1528171352 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 16, 2006 |
| Last updated in NPPES | Mar 7, 2023 |
| Certified by provider | Oct 13, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | A85781 | 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 | 213 |
|---|---|
| Services billed | 1,261 across 35 procedure codes |
| Paid by Medicare | $75,528 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,147 · 4,283 30-day fills |
|---|---|
| Patients | 189 |
| Total drug cost | $215,484 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Loma Linda University School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- Rosaasen Family Medicine, Inc.Thousand Oaks, CA · 2 clinicians
Hospital affiliations
- Adventist Health Simi ValleySimi Valley, CA
- Los Robles Hospital & Medical CenterThousand Oaks, CA
Other facilities
- Access Tlc Home Health CareHome health agency · San Fernando, CA
- Assisted Home CareHome health agency · Mission Hills, CA
- Oakview Skilled NursingNursing home · Thousand Oaks, CA
Industry payments (Open Payments)
- 2025$1,259 · 79 payments from 11 companies
- 2024$1,611 · 95 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $473.90 | 29 |
| Novo Nordisk Inc | $196.54 | 15 |
| Astrazeneca Pharmaceuticals LP | $156.63 | 11 |
| Lilly USA, LLC | $146.38 | 11 |
| Eisai Inc. | $84.45 | 3 |
What the 2025 payments were for
- Food and Beverage$1,259 · 79 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 56 family medicine physicians in Thousand Oaks · All family medicine physicians in California