Keith Alan Friedenberg, M.D.
NPI 1104928043ActiveIndividual· Internal Medicine, Gastroenterology· Mentor, OH
Internal Medicine, Gastroenterology (M.D.) with Dayton Gastroenterology, LLC, practicing in Mentor, Ohio. Their prescriptions cost Medicare Part D more than their services did: $655,719 for 2,949 claims, against $231,558 paid for services in 2024. Phathom Pharmaceuticals, Inc. was the largest of 20 companies reporting payments in 2025, $23,422 in all, mostly speaking and faculty fees. Lists Lake Health and 1 other hospital as hospital affiliations.
Overview
| NPI | 1104928043 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 1, 2006 |
| Last updated in NPPES | Feb 16, 2026 |
| Certified by provider | Feb 16, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 35067316 | 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 | 533 |
|---|---|
| Services billed | 8,814 across 36 procedure codes |
| Paid by Medicare | $231,558 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,949 · 5,816 30-day fills |
|---|---|
| Patients | 746 |
| Total drug cost | $655,719 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Dayton Gastroenterology, LLCDayton, OH · 74 clinicians
Hospital affiliations
- Lake HealthConcord, OH
- Uh Cleveland Medical CenterCleveland, OH
Industry payments (Open Payments)
- 2025$23,422 · 117 payments from 20 companies
- 2024$44,508 · 163 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $21,997 | 37 |
| Abbvie Inc. | $286.58 | 18 |
| Aimmune Therapeutics, Inc. | $180.10 | 13 |
| Pfizer Inc. | $169.77 | 8 |
| Takeda Pharmaceuticals U.S.A., Inc. | $143.03 | 8 |
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$20,640 · 11 payments
- Food and Beverage$2,735 · 104 payments
- Travel and Lodging$46.20 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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