Thomas B. Knowles, MD
NPI 1114337466ActiveIndividual· Surgery· Portland, OR
Surgery (MD) in Portland, Oregon, trained at Creighton University School of Medicine (class of 2014). 142 Medicare patients in 2024, $57,868 paid; nearly all of their 70 Part D prescriptions were generic (96%). Intuitive Surgical, Inc. reported $1,008 in payments in 2025, mostly travel and lodging.
Overview
| NPI | 1114337466 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 7, 2014 |
| Last updated in NPPES | Aug 27, 2020 |
| Certified by provider | Aug 27, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | MD60946286 | WA |
| Surgery | 208600000X | MD198666 | OR |
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 - General Surgery (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 142 |
|---|---|
| Services billed | 367 across 66 procedure codes |
| Paid by Medicare | $57,868 |
Part D prescriptions in 2024
| Prescriptions (claims) | 70 · 86 30-day fills |
|---|---|
| Patients | 36 |
| Total drug cost | $2,218 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | Creighton University School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | General Surgery |
| Telehealth | Offers telehealth |
Medical group
- Legacy Clinics LLCPortland, OR · 713 clinicians
Hospital affiliations
- Legacy Emanuel Medical CenterPortland, OR
- Legacy Good Samaritan Medical CenterPortland, OR
- Legacy Mount Hood Medical CenterGresham, OR
- Legacy Salmon Creek Medical CenterVancouver, WA
- Samaritan Pacific Community HospitalNewport, OR
Industry payments (Open Payments)
- 2025$1,008 · 6 payments from 1 company
- 2024$390.13 · 8 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,008 | 6 |
What the 2025 payments were for
- Travel and Lodging$1,008 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 188 general surgeons in Portland · All general surgeons in Oregon