Heather Ruth Cassell, MD
NPI 1093700684ActiveIndividual· Allergy & Immunology· Tucson, AZ
Allergy & Immunology (MD) in Tucson, Arizona, trained at University of Arizona College of Medicine (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $54,345 for 178 claims, against $2,063 paid for services in 2024. Regeneron Healthcare Solutions, Inc. reported $125.00 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1093700684 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 20, 2005 |
| Last updated in NPPES | Oct 29, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 30265 | AZ |
| Pediatrics | 208000000X | 30265 | 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 - Allergy/Immunology (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 12 |
|---|---|
| Services billed | 72 across 11 procedure codes |
| Paid by Medicare | $2,063 |
Part D prescriptions in 2024
| Prescriptions (claims) | 178 · 330 30-day fills |
|---|---|
| Patients | 22 |
| Total drug cost | $54,345 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | University of Arizona College of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Allergy/Immunology |
Medical group
- Banner-University Medical GroupTucson, AZ · 1,072 clinicians
Industry payments (Open Payments)
- 2025$125.00 · 1 payment from 1 company
- 2024$83.39 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $125.00 | 1 |
What the 2025 payments were for
- Food and Beverage$125.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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