Gregory Park, M.D.
NPI 1861497596ActiveIndividual· Internal Medicine· Wailuku, HI
Internal Medicine (M.D.) in Wailuku, Hawaii, trained at Albert Einstein College of Medicine of Yeshiva University (class of 1975). Their prescriptions cost Medicare Part D more than their services did: $937,622 for 5,008 claims, against $87,474 paid for services in 2024. Lilly USA, LLC was the largest of 2 companies reporting payments in 2025, $39.33 in all, mostly food and beverage.
Overview
| NPI | 1861497596 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 17, 2005 |
| Last updated in NPPES | Jul 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MD3915 | 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 | 244 |
|---|---|
| Services billed | 1,513 across 39 procedure codes |
| Paid by Medicare | $87,474 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,008 · 10,791 30-day fills |
|---|---|
| Patients | 295 |
| Total drug cost | $937,622 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Albert Einstein College of Medicine of Yeshiva University |
|---|---|
| Graduation year | 1975 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Medical Oncology |
Medical group
- Wailea Medical Group LLCWailea, HI · 2 clinicians
Hospital affiliations
- Cooley Dickinson Hospital Inc,theNorthampton, MA
- Maui Memorial Medical CenterWailuku, HI
Other facilities
- Bayada Home Health CareHome health agency · Wailuku, HI
- Home Health MauiHome health agency · Wailuku, HI
Industry payments (Open Payments)
- 2025$39.33 · 2 payments from 2 companies
- 2024$73.56 · 3 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $23.64 | 1 |
| Abbvie Inc. | $15.69 | 1 |
What the 2025 payments were for
- Food and Beverage$39.33 · 2 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