Wassim Assaf, MD
NPI 1548400278ActiveIndividual· Internal Medicine, Sleep Medicine· Auburn, MA
Internal Medicine, Sleep Medicine (MD) with Assaf Inc, practicing in Auburn, Massachusetts. 256 Medicare patients in 2024, $77,684 paid; nearly all of their 255 Part D prescriptions were generic (92%). Inspire Medical Systems, Inc. reported $46.97 in payments in 2025, mostly food and beverage. Lists Athol Memorial Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1548400278 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 20, 2009 |
| Last updated in NPPES | Feb 3, 2021 |
| Certified by provider | Feb 3, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Sleep Medicine Primary | 207RS0012X | 265574 | MA |
| Internal Medicine | 207R00000X | 265574 | MA |
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 (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 256 |
|---|---|
| Services billed | 786 across 25 procedure codes |
| Paid by Medicare | $77,684 |
Part D prescriptions in 2024
| Prescriptions (claims) | 255 · 276 30-day fills |
|---|---|
| Patients | 112 |
| Total drug cost | $11,094 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2004 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Sleep Medicine |
| Telehealth | Offers telehealth |
Medical group
- Assaf IncAuburn, MA · 2 clinicians
Hospital affiliations
- Athol Memorial HospitalAthol, MA
- Heywood Hospital -Gardner, MA
Industry payments (Open Payments)
- 2025$46.97 · 2 payments from 1 company
- 2024$56.47 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Inspire Medical Systems, Inc. | $46.97 | 2 |
What the 2025 payments were for
- Food and Beverage$46.97 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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