Allen Lun Hwang, M.D., M.S.C.E.
NPI 1558532689ActiveIndividual· Internal Medicine, Gastroenterology· Boston, MA
Internal Medicine, Gastroenterology (M.D., M.S.C.E.) in Boston, Massachusetts, trained at Duke University School of Medicine (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $385,215 for 696 claims, against $131,992 paid for services in 2024. Olympus Medical Systems Corporation was the largest of 18 companies reporting payments in 2025, $5,199 in all, mostly consulting fees.
Overview
| NPI | 1558532689 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.S.C.E. |
| Sole proprietor | Yes |
| NPI issued | Mar 17, 2008 |
| Last updated in NPPES | Nov 20, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 250535 | MA |
| Internal Medicine | 207R00000X | A103081 | 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 - Gastroenterology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 595 |
|---|---|
| Services billed | 1,810 across 63 procedure codes |
| Paid by Medicare | $131,992 |
Part D prescriptions in 2024
| Prescriptions (claims) | 696 · 1,082 30-day fills |
|---|---|
| Patients | 261 |
| Total drug cost | $385,215 |
| Generic share | 67% of claims |
Education and affiliations
| Medical school | Duke University School of Medicine |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical groups
- Integrated Gastroenterology Consultants, P.C.Andover, MA · 38 clinicians
- Igc III PLLCLowell, MA · 3 clinicians
Hospital affiliations
- Lowell General HospitalLowell, MA
- Merrimack Health Lawrence HospitalLawrence, MA
Industry payments (Open Payments)
- 2025$5,199 · 77 payments from 18 companies
- 2024$3,027 · 47 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Olympus Medical Systems Corporation | $3,565 | 2 |
| Gilead Sciences, Inc. | $321.76 | 13 |
| Takeda Pharmaceuticals U.S.A., Inc. | $273.89 | 10 |
| Abbvie Inc. | $172.85 | 13 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $151.45 | 11 |
What the 2025 payments were for
- Consulting Fee$3,565 · 2 payments
- Food and Beverage$1,622 · 74 payments
- Education$12.42 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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