Adam Louis Peyton, DO
NPI 1558565598ActiveIndividual· Internal Medicine, Gastroenterology· Allentown, PA
Internal Medicine, Gastroenterology (DO) in Allentown, Pennsylvania, trained at Philadelphia College of Osteopathic Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $1,682,198 for 1,596 claims, against $534,678 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 8 companies reporting payments in 2025, $241,499 in all, mostly speaking and faculty fees.
Overview
| NPI | 1558565598 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jun 13, 2007 |
| Last updated in NPPES | May 26, 2021 |
| Certified by provider | May 26, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | OS012553 | PA |
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 (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 590 |
|---|---|
| Services billed | 27,155 across 44 procedure codes |
| Paid by Medicare | $534,678 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,596 · 2,545 30-day fills |
|---|---|
| Patients | 286 |
| Total drug cost | $1,682,198 |
| Generic share | 78% of claims |
Education and affiliations
| Medical school | Philadelphia College of Osteopathic Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Lehigh Valley Physician GroupAllentown, PA · 2,542 clinicians
Hospital affiliations
- Lehigh Valley HospitalAllentown, PA
- Lehigh Valley Hospital - Dickson CityDickson City, PA
- Lehigh Valley Hospital - HazletonHazleton, PA
- Lehigh Valley Hospital - PoconoEast Stroudsburg, PA
- Schuylkill Medical Center - South Jackson StreetPottsville, PA
Industry payments (Open Payments)
- 2025$241,499 · 162 payments from 8 companies
- 2024$128,993 · 131 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $103,153 | 68 |
| Gilead Sciences, Inc. | $61,396 | 53 |
| Mallinckrodt Hospital Products Inc. | $23,535 | 12 |
| Novo Nordisk Inc | $23,459 | 8 |
| Ipsen Biopharmaceuticals, Inc | $15,970 | 10 |
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$218,756 · 56 payments
- Travel and Lodging$10,904 · 40 payments
- Consulting Fee$6,001 · 3 payments
- Food and Beverage$5,838 · 63 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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