David Zack, D.O.
NPI 1407955008ActiveIndividual· Internal Medicine, Gastroenterology· Toledo, OH
Internal Medicine, Gastroenterology (D.O.) in Toledo, Ohio, trained at Philadelphia College of Osteopathic Medicine (class of 1992). Their prescriptions cost Medicare Part D more than their services did: $2,245,216 for 1,722 claims, against $81,356 paid for services in 2024. Abbvie Inc. was the largest of 17 companies reporting payments in 2025, $2,447 in all, mostly food and beverage.
Overview
| NPI | 1407955008 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Sep 21, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 34006071 | OH |
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 (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 480 |
|---|---|
| Services billed | 782 across 35 procedure codes |
| Paid by Medicare | $81,356 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,722 · 2,682 30-day fills |
|---|---|
| Patients | 514 |
| Total drug cost | $2,245,216 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | Philadelphia College of Osteopathic Medicine |
|---|---|
| Graduation year | 1992 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Northwest Ohio Gastroenterology Associates IncToledo, OH · 6 clinicians
Hospital affiliations
- Bay Park Community HospitalOregon, OH
- Fulton County Health CenterWauseon, OH
- Mercy St Vincent Medical CenterToledo, OH
- Promedica Toledo HospitalToledo, OH
- Wood County HospitalBowling Green, OH
Industry payments (Open Payments)
- 2025$2,447 · 143 payments from 17 companies
- 2024$2,069 · 125 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $604.96 | 40 |
| Takeda Pharmaceuticals U.S.A., Inc. | $499.13 | 36 |
| Janssen Biotech, Inc. | $323.60 | 22 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $163.55 | 10 |
| Pfizer Inc. | $154.88 | 7 |
What the 2025 payments were for
- Food and Beverage$2,447 · 143 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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