Jonathan Rosaasen, M.D.
NPI 1528171352 · Family Medicine Physician · Thousand Oaks, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Rosaasen, M.D. is a Family Medicine Physician provider in Thousand Oaks, CA (NPI 1528171352).
Provider details
- NPI number
- 1528171352
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A85781 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,030 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 404 | $95 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 208 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 195 | $135 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 95 | $15 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 76 | $137 |
| Administration of Influenza Virus VaccineG0008 | 32 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 62 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 107 | 31 |
| Alprazolam | 92 | 23 |
| Levothyroxine Sodium | 74 | 18 |
| Lisinopril | 54 | 17 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 53 | 16 |
| Zolpidem Tartrate | 47 | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,611 across 95 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
Additional practice locations (2)
- 301 Science DrSuite #190Moorpark, CA 93021-2094Phone: (805) 531-9400Fax: (805) 531-9499
- 430 E Avenida De Los Arboles Ste 204Thousand Oaks, CA 91360-3017Phone: (805) 492-1015Fax: (805) 492-2035
Registry dates
- Enumerated
- 2006-08-16
- Last updated
- 2023-03-07
- Certified
- 2020-10-13
Frequently asked questions
- What is Jonathan Rosaasen's NPI number?
- Jonathan Rosaasen's National Provider Identifier (NPI) is 1528171352, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Rosaasen's specialty?
- Jonathan Rosaasen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Rosaasen located?
- Jonathan Rosaasen's practice location on file with NPPES is 187 E Wilbur Rd # 100, Thousand Oaks, CA 91360-5572.
- What is Jonathan Rosaasen's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Rosaasen is (805) 492-1015.
- Does Jonathan Rosaasen accept Medicare?
- Jonathan Rosaasen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Rosaasen's NPI active?
- Yes — Jonathan Rosaasen's NPI (1528171352) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.