Tamara Sue Rivenburgh-Casillas, FNP
NPI 1134102965ActiveIndividual· Nurse Practitioner· Chandler, AZ
Nurse Practitioner (FNP) with East Valley Dermatology Center, practicing in Chandler, Arizona. Their prescriptions cost Medicare Part D more than their services did: $126,321 for 1,038 claims, against $72,891 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 15 companies reporting payments in 2025, $2,090 in all, mostly food and beverage.
Overview
| NPI | 1134102965 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP |
| Sole proprietor | No |
| NPI issued | Nov 25, 2005 |
| Last updated in NPPES | Sep 1, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | AP0528 | AZ |
| Nurse Practitioner, Family | 363LF0000X | AP0528 | AZ |
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 (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 591 |
|---|---|
| Services billed | 2,430 across 37 procedure codes |
| Paid by Medicare | $72,891 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,038 · 2,118 30-day fills |
|---|---|
| Patients | 290 |
| Total drug cost | $126,321 |
| Generic share | 99% of claims |
Education and affiliations
| Graduation year | 1996 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- East Valley Dermatology CenterChandler, AZ · 15 clinicians
Industry payments (Open Payments)
- 2025$2,090 · 98 payments from 15 companies
- 2024$2,444 · 121 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $304.72 | 11 |
| Arcutis Biotherapeutics, Inc. | $294.74 | 13 |
| Incyte Corporation | $249.44 | 8 |
| Genzyme Corporation | $215.27 | 6 |
| Janssen Biotech, Inc. | $196.68 | 6 |
What the 2025 payments were for
- Food and Beverage$1,982 · 96 payments
- Education$108.65 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 51 nurse practitioners in Chandler · All nurse practitioners in Arizona