Hiroyuki Aihara, M.D.
NPI 1619395795ActiveIndividual· Internal Medicine, Gastroenterology· Boston, MA
Internal Medicine, Gastroenterology (M.D.) with Brigham and Womens Physicians Organization Inc, practicing in Boston, Massachusetts. 391 Medicare patients in 2024, $90,841 paid; nearly all of their 107 Part D prescriptions were generic (92%). Boston Scientific Corporation was the largest of 12 companies reporting payments in 2025, $146,128 in all, mostly speaking and faculty fees. Lists Brigham and Women Faulkner Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1619395795 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 4, 2014 |
| Last updated in NPPES | Oct 21, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 260891 | MA |
| Internal Medicine, Gastroenterology | 207RG0100X | 395805 | ZZ |
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 - Gastroenterology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 391 |
|---|---|
| Services billed | 698 across 30 procedure codes |
| Paid by Medicare | $90,841 |
Part D prescriptions in 2024
| Prescriptions (claims) | 107 · 111 30-day fills |
|---|---|
| Patients | 94 |
| Total drug cost | $1,598 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Brigham and Womens Physicians Organization IncBoston, MA · 2,994 clinicians
Hospital affiliations
- Brigham and Women Faulkner HospitalJamaica Plain, MA
- Brigham and Women's HospitalBoston, MA
- Massachusetts General HospitalBoston, MA
Industry payments (Open Payments)
- 2025$146,128 · 168 payments from 12 companies
- 2024$155,228 · 168 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boston Scientific Corporation | $69,275 | 64 |
| Olympus Corporation of the Americas | $56,073 | 82 |
| Olympus Medical Systems Corporation | $7,002 | 8 |
| Micro-Tech Endoscopy USA, Inc. | $5,000 | 2 |
| Capsovision, Inc. | $4,667 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$56,875 · 26 payments
- Education$46,733 · 18 payments
- Consulting Fee$27,953 · 24 payments
- Travel and Lodging$7,823 · 55 payments
- Compensation for serving as faculty or as a speaker for a medical education program$4,000 · 1 payment
- Food and Beverage$2,744 · 44 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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