Michelle S. Gapay, NP
NPI 1558549089ActiveIndividual· Nurse Practitioner· Stanford, CA
Nurse Practitioner (NP) with Stanford Health Care, practicing in Stanford, California. Their prescriptions cost Medicare Part D more than their services did: $4,469,062 for 656 claims, against $30,789 paid for services in 2024. Argenx US, Inc. was the largest of 8 companies reporting payments in 2025, $8,485 in all, mostly consulting fees. Lists Stanford Health Care as a hospital affiliation.
Overview
| NPI | 1558549089 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | Feb 6, 2008 |
| Last updated in NPPES | Dec 30, 2025 |
| Certified by provider | Dec 30, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 17555 | CA |
| Nurse Practitioner | 363L00000X | F430383-1 | NY |
| Nurse Practitioner, Adult Health | 363LA2200X | 17555 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (CA); Practitioner - Nurse Practitioner (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 201 |
|---|---|
| Services billed | 501 across 14 procedure codes |
| Paid by Medicare | $30,789 |
Part D prescriptions in 2024
| Prescriptions (claims) | 656 · 1,016 30-day fills |
|---|---|
| Patients | 109 |
| Total drug cost | $4,469,062 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Stanford Health CareStanford, CA · 3,122 clinicians
Hospital affiliation
- Stanford Health CareStanford, CA
Industry payments (Open Payments)
- 2025$8,485 · 25 payments from 8 companies
- 2024$9,882 · 32 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Argenx US, Inc. | $2,891 | 12 |
| Ucb, Inc. | $2,243 | 4 |
| Janssen Biotech, Inc. | $1,506 | 2 |
| Genentech USA, Inc. | $750.00 | 1 |
| Catalyst Pharmaceuticals, Inc. | $725.00 | 2 |
What the 2025 payments were for
- Consulting Fee$3,110 · 2 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$2,663 · 2 payments
- Travel and Lodging$1,132 · 7 payments
- Food and Beverage$980.36 · 13 payments
- Honoraria$600.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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