Hui-Wen A. Dai, D.O.
NPI 1609053701ActiveIndividual· Family Medicine· Fallbrook, CA
Family Medicine (D.O.) with Graybill Medical Group Inc, practicing in Fallbrook, California. Their prescriptions cost Medicare Part D more than their services did: $417,994 for 5,189 claims, against $63,512 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 6 companies reporting payments in 2025, $219.12 in all, mostly food and beverage.
Overview
| NPI | 1609053701 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jan 30, 2008 |
| Last updated in NPPES | Dec 12, 2024 |
| Certified by provider | Dec 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 20A10278 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 231 |
|---|---|
| Services billed | 1,178 across 76 procedure codes |
| Paid by Medicare | $63,512 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,189 · 11,835 30-day fills |
|---|---|
| Patients | 566 |
| Total drug cost | $417,994 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- Graybill Medical Group IncOceanside, CA · 104 clinicians
Other facilities
- Archer Health IncHome health agency · Carlsbad, CA
Industry payments (Open Payments)
- 2025$219.12 · 10 payments from 6 companies
- 2024$239.21 · 12 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $81.85 | 3 |
| Merck Sharp & Dohme LLC | $37.70 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $31.69 | 2 |
| Novo Nordisk Inc | $29.17 | 1 |
| Exact Sciences Corporation | $21.61 | 1 |
What the 2025 payments were for
- Food and Beverage$219.12 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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