Lorene K. Siaw, MD
NPI 1417002510ActiveIndividual· Internal Medicine· Wailuku, HI
Internal Medicine (MD) with Maui Medical Group Inc, practicing in Wailuku, Hawaii. Their prescriptions cost Medicare Part D more than their services did: $80,386 for 1,123 claims, against $19,411 paid for services in 2024. Amgen Inc. was the largest of 2 companies reporting payments in 2025, $69.58 in all, mostly food and beverage.
Overview
| NPI | 1417002510 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jan 25, 2007 |
| Last updated in NPPES | Apr 7, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MD-8917 | HI |
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 - Internal Medicine (HI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 139 |
|---|---|
| Services billed | 202 across 22 procedure codes |
| Paid by Medicare | $19,411 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,123 · 1,137 30-day fills |
|---|---|
| Patients | 132 |
| Total drug cost | $80,386 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 1992 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Maui Medical Group IncWailuku, HI · 67 clinicians
Industry payments (Open Payments)
- 2025$69.58 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $53.46 | 2 |
| Mimedx Group, Inc. | $16.12 | 1 |
What the 2025 payments were for
- Food and Beverage$69.58 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 42 internal medicine physicians in Wailuku · All internal medicine physicians in Hawaii