Bartholomew David Sak, MD
NPI 1093755167ActiveIndividual· Hospitalist· Muskegon, MI
Hospitalist (MD) with Spectrum Health Primary Care Partners and 1 other group, practicing in Muskegon, Michigan. In 2024 Medicare paid $39,823 for 268 patients, and Part D covered 547 of their prescriptions, 87% of them generic. Vertex Pharmaceuticals Incorporated was the largest of 3 companies reporting payments in 2025, $54.95 in all, mostly food and beverage. Lists Maui Memorial Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1093755167 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 7, 2006 |
| Last updated in NPPES | Apr 22, 2022 |
| Certified by provider | Apr 22, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | 4301068868 | MI |
| Internal Medicine | 207R00000X | 4301068868 | MI |
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 - Hospitalist (HI); Practitioner - Internal Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 268 |
|---|---|
| Services billed | 530 across 17 procedure codes |
| Paid by Medicare | $39,823 |
Part D prescriptions in 2024
| Prescriptions (claims) | 547 · 764 30-day fills |
|---|---|
| Patients | 112 |
| Total drug cost | $48,039 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1993 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Hospitalist |
Medical groups
- Spectrum Health Primary Care PartnersGrand Rapids, MI · 2,294 clinicians
- Mercy Specialty ServicesMuskegon, MI · 90 clinicians
Hospital affiliations
- Maui Memorial Medical CenterWailuku, HI
- Mercy Health Lakeshore CampusShelby, MI
- Trinity Health Muskegon HospitalMuskegon, MI
Industry payments (Open Payments)
- 2025$54.95 · 3 payments from 3 companies
- 2024$141.36 · 6 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Vertex Pharmaceuticals Incorporated | $20.52 | 1 |
| E.R. Squibb & Sons, L.L.C. | $19.75 | 1 |
| Merck Sharp & Dohme LLC | $14.68 | 1 |
What the 2025 payments were for
- Food and Beverage$54.95 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 35 hospitalists in Muskegon · All hospitalists in Michigan