Brian D. Marks, D.O.
NPI 1013982883ActiveIndividual· Internal Medicine· Scottsdale, AZ
Internal Medicine (D.O.) in Scottsdale, Arizona, trained at Midwestern University, Chicago College of Osteopathic Med (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $285,713 for 3,283 claims, against $59,614 paid for services in 2024. Amgen Inc. was the largest of 13 companies reporting payments in 2025, $1,293 in all, mostly food and beverage.
Overview
| NPI | 1013982883 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Feb 23, 2006 |
| Last updated in NPPES | Feb 9, 2026 |
| Certified by provider | Feb 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2964 | 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 - Internal Medicine (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 155 |
|---|---|
| Services billed | 654 across 17 procedure codes |
| Paid by Medicare | $59,614 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,283 · 8,810 30-day fills |
|---|---|
| Patients | 280 |
| Total drug cost | $285,713 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Midwestern University, Chicago College of Osteopathic Med |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Internal Medicine |
Hospital affiliations
- Honor Health John C. Lincoln Medical CenterPhoenix, AZ
- Honorhealth Scottsdale Osborn Medical CenterScottsdale, AZ
Industry payments (Open Payments)
- 2025$1,293 · 34 payments from 13 companies
- 2024$1,043 · 47 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $384.89 | 10 |
| Phathom Pharmaceuticals, Inc. | $171.64 | 3 |
| Exact Sciences Corporation | $146.94 | 3 |
| Abbvie Inc. | $144.55 | 2 |
| Intuitive Surgical, Inc. | $130.73 | 1 |
What the 2025 payments were for
- Food and Beverage$1,293 · 34 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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