Theresa Louise Mortensen, N.P.
NPI 1972683753ActiveIndividual· Nurse Practitioner· Santa Rosa, CA
Nurse Practitioner (N.P.) with Providence Medical Foundation, practicing in Santa Rosa, California. Their prescriptions cost Medicare Part D more than their services did: $2,918,126 for 1,168 claims, against $5,533 paid for services in 2024. Regeneron Pharmaceuticals, Inc. was the largest of 14 companies reporting payments in 2025, $505.66 in all, mostly food and beverage. Lists Healdsburg Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1972683753 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | N.P. |
| Sole proprietor | No |
| NPI issued | Oct 16, 2006 |
| Last updated in NPPES | Nov 8, 2021 |
| Certified by provider | Nov 8, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 402482 | 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 - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 50 |
|---|---|
| Services billed | 100 across 5 procedure codes |
| Paid by Medicare | $5,533 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,168 · 1,625 30-day fills |
|---|---|
| Patients | 406 |
| Total drug cost | $2,918,126 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliations
- Healdsburg HospitalHealdsburg, CA
- Petaluma Valley HospitalPetaluma, CA
- Providence Santa Rosa Memorial HospitalSanta Rosa, CA
- Sonoma Valley HospitalSonoma, CA
Industry payments (Open Payments)
- 2025$505.66 · 18 payments from 14 companies
- 2024$974.20 · 29 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Pharmaceuticals, Inc. | $79.65 | 2 |
| Daiichi Sankyo Inc. | $60.90 | 3 |
| Astrazeneca Pharmaceuticals LP | $50.20 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $36.30 | 1 |
| Regeneron Healthcare Solutions, Inc. | $35.69 | 1 |
What the 2025 payments were for
- Food and Beverage$505.66 · 18 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 72 nurse practitioners in Santa Rosa · All nurse practitioners in California