Robert Howard Drennan, MD
NPI 1538336177ActiveIndividual· Internal Medicine, Clinical Cardiac Electrophysiology· Baton Rouge, LA
Internal Medicine, Clinical Cardiac Electrophysiology (MD) in Baton Rouge, Louisiana, trained at University of South Carolina School of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $756,614 for 4,035 claims, against $184,576 paid for services in 2024. Abbott Laboratories was the largest of 16 companies reporting payments in 2025, $3,889 in all, mostly food and beverage.
Overview
| NPI | 1538336177 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 13, 2008 |
| Last updated in NPPES | Aug 31, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Clinical Cardiac Electrophysiology Primary | 207RC0001X | 204133 | LA |
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 - Cardiac Electrophysiology (LA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 947 |
|---|---|
| Services billed | 3,433 across 102 procedure codes |
| Paid by Medicare | $184,576 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,035 · 9,074 30-day fills |
|---|---|
| Patients | 427 |
| Total drug cost | $756,614 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | University of South Carolina School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Cardiac Electrophysiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
Medical groups
- Cardiovascular Institute of the South, LLCLafayette, LA · 146 clinicians
- Hospital Service District 1 of East Baton Rouge ParishZachary, LA · 44 clinicians
Hospital affiliations
- Baton Rouge General Medical CenterBaton Rouge, LA
- Lane Regional Medical CenterZachary, LA
- Our Lady of the Lake Regional Medical CenterBaton Rouge, LA
- The GeneralBaton Rouge, LA
Industry payments (Open Payments)
- 2025$3,889 · 76 payments from 16 companies
- 2024$5,069 · 80 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $2,587 | 36 |
| Medtronic, Inc. | $369.45 | 6 |
| Novo Nordisk Inc | $166.17 | 3 |
| Bard Peripheral Vascular, Inc. | $159.82 | 1 |
| Novartis Pharmaceuticals Corporation | $155.54 | 13 |
What the 2025 payments were for
- Food and Beverage$2,089 · 75 payments
- Consulting Fee$1,800 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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