Tamar Virtelle Lan Walker, MD, MBA
NPI 1205396397ActiveIndividual· Surgery· Portland, OR
Surgery (MD, MBA) in Portland, Oregon, trained at University of Southern California Keck School of Medicine (class of 2019). Mostly services rather than prescriptions: Medicare paid $1,797 for 12 patients in 2024, with only 11 Part D claims. Intuitive Surgical, Inc. reported $1,029 in payments in 2025, mostly education.
Overview
| NPI | 1205396397 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, MBA |
| Sole proprietor | No |
| NPI issued | Mar 23, 2019 |
| Last updated in NPPES | Jul 22, 2025 |
| Certified by provider | Jul 22, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | MD219471 | OR |
| Surgery | 208600000X | MD600004247 | DC |
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 (DC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 12 |
|---|---|
| Services billed | 14 across 11 procedure codes |
| Paid by Medicare | $1,797 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11 · 11 30-day fills |
|---|---|
| Total drug cost | $72.60 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | General Surgery |
Medical group
- Medical Faculty Associates, IncWashington, DC · 672 clinicians
Industry payments (Open Payments)
- 2025$1,029 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,029 | 2 |
What the 2025 payments were for
- Education$1,000 · 1 payment
- Food and Beverage$28.98 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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