John Daniel Herlihy IV, M.D.
NPI 1245625151ActiveIndividual· Internal Medicine, Gastroenterology· Cedar Rapids, IA
Internal Medicine, Gastroenterology (M.D.) in Cedar Rapids, Iowa, trained at University of Texas Medical School at San Antonio (class of 2015). Their prescriptions cost Medicare Part D more than their services did: $1,032,047 for 1,309 claims, against $22,028 paid for services in 2024. Abbvie Inc. was the largest of 21 companies reporting payments in 2025, $1,504 in all, mostly food and beverage.
Overview
| NPI | 1245625151 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 30, 2015 |
| Last updated in NPPES | Aug 14, 2025 |
| Certified by provider | Aug 14, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | MD-53981 | IA |
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 (IA); Practitioner - Gastroenterology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 90 |
|---|---|
| Services billed | 777 across 45 procedure codes |
| Paid by Medicare | $22,028 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,309 · 2,236 30-day fills |
|---|---|
| Patients | 416 |
| Total drug cost | $1,032,047 |
| Generic share | 64% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at San Antonio |
|---|---|
| Graduation year | 2015 |
| Medicare specialty | Gastroenterology |
Medical group
- Mercy Medical CenterCedar Rapids, IA · 305 clinicians
Hospital affiliation
- Mercy Medical Center - Cedar RapidsCedar Rapids, IA
Industry payments (Open Payments)
- 2025$1,504 · 89 payments from 21 companies
- 2024$4,001 · 136 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $336.85 | 27 |
| Regeneron Healthcare Solutions, Inc. | $160.22 | 9 |
| Gilead Sciences, Inc. | $158.32 | 6 |
| Ardelyx, Inc. | $138.51 | 9 |
| Phathom Pharmaceuticals, Inc. | $113.48 | 8 |
What the 2025 payments were for
- Food and Beverage$1,504 · 89 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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