Benjamin L. Grannan, MD
NPI 1417360561ActiveIndividual· Neurological Surgery· Seattle, WA
Neurological Surgery (MD) in Seattle, Washington, trained at Harvard Medical School (class of 2014). Medicare paid $93,734 for services to 111 patients in 2024. Medtronic, Inc. was the largest of 2 companies reporting payments in 2025, $1,455 in all, mostly travel and lodging.
Overview
| NPI | 1417360561 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 6, 2014 |
| Last updated in NPPES | May 13, 2021 |
| Certified by provider | May 13, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Neurological Surgery Primary | 207T00000X | MD61138194 | WA |
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 - Neurosurgery (WA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 111 |
|---|---|
| Services billed | 208 across 53 procedure codes |
| Paid by Medicare | $93,734 |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Neurosurgery |
| Telehealth | Offers telehealth |
Medical group
- The Association of University PhysiciansSeattle, WA · 3,535 clinicians
Hospital affiliations
- Harborview Medical CenterSeattle, WA
- University of Washington Medical CtrSeattle, WA
Industry payments (Open Payments)
- 2025$1,455 · 19 payments from 2 companies
- 2024$61.41 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $1,349 | 18 |
| Boston Scientific Corporation | $105.74 | 1 |
What the 2025 payments were for
- Travel and Lodging$991.33 · 7 payments
- Food and Beverage$463.23 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 135 neurosurgeons in Seattle · All neurosurgeons in Washington