Brian P. Callahan, MD
NPI 1982750576ActiveIndividual· Neurological Surgery· Tucson, AZ
Neurological Surgery (MD) in Tucson, Arizona, trained at University of Colorado School of Medicine, Denver (class of 2003). 319 Medicare patients in 2024, $147,733 paid; all of their 407 Part D prescriptions were generic. Abbvie Inc. was the largest of 6 companies reporting payments in 2025, $199.27 in all, mostly food and beverage.
Overview
| NPI | 1982750576 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 26, 2007 |
| Last updated in NPPES | Apr 11, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | 43234 | AZ |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Neurosurgery (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 319 |
|---|---|
| Services billed | 894 across 87 procedure codes |
| Paid by Medicare | $147,733 |
Part D prescriptions in 2024
| Prescriptions (claims) | 407 · 439 30-day fills |
|---|---|
| Patients | 153 |
| Total drug cost | $4,758 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Colorado School of Medicine, Denver |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Neurosurgery |
| Telehealth | Offers telehealth |
Medical group
- Neurological Associates of TucsonTucson, AZ · 61 clinicians
Hospital affiliations
- Benson HospitalBenson, AZ
- Tucson Medical CenterTucson, AZ
Industry payments (Open Payments)
- 2025$199.27 · 9 payments from 6 companies
- 2024$134.56 · 7 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $77.59 | 3 |
| Servier Pharmaceuticals LLC | $52.03 | 2 |
| Vanda Pharmaceuticals Inc. | $21.01 | 1 |
| Eisai Inc. | $19.31 | 1 |
| Biogen, Inc. | $15.60 | 1 |
What the 2025 payments were for
- Food and Beverage$199.27 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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