Karen Michelle Phan Wai, MD
NPI 1073017208ActiveIndividual· Ophthalmology· Stanford, CA
Ophthalmology (MD) with Stanford Health Care and 2 other groups, practicing in Stanford, California. In 2024 Medicare paid $74,359 for 318 patients, and Part D covered 124 of their prescriptions, 71% of them generic. Genentech USA, Inc. was the largest of 7 companies reporting payments in 2025, $5,567 in all, mostly consulting fees. Lists Stanford Health Care as a hospital affiliation.
Overview
| NPI | 1073017208 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 21, 2018 |
| Last updated in NPPES | Mar 17, 2025 |
| Certified by provider | Mar 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | A176636 | CA |
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 - Ophthalmology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 318 |
|---|---|
| Services billed | 1,103 across 30 procedure codes |
| Paid by Medicare | $74,359 |
Part D prescriptions in 2024
| Prescriptions (claims) | 124 · 221 30-day fills |
|---|---|
| Patients | 58 |
| Total drug cost | $6,191 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Ophthalmology |
Medical groups
- Stanford Health CareStanford, CA · 3,122 clinicians
- County of Santa ClaraSan Jose, CA · 1,022 clinicians
- University Healthcare AlliancePleasanton, CA · 327 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$5,567 · 17 payments from 7 companies
- 2024$3,138 · 13 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech USA, Inc. | $5,032 | 8 |
| Astellas Pharma Global Development | $192.84 | 2 |
| Regeneron Pharmaceuticals, Inc. | $154.69 | 2 |
| Astellas Pharma US Inc | $68.79 | 1 |
| Ani Pharmaceuticals, Inc. | $50.23 | 2 |
What the 2025 payments were for
- Consulting Fee$3,465 · 1 payment
- Travel and Lodging$1,189 · 2 payments
- Food and Beverage$913.55 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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