Allyn Chesney Sisson, FNP
NPI 1205589157ActiveIndividual· Nurse Practitioner, Family· Meridian, MS
Nurse Practitioner, Family (FNP) with Cardiovascular Institute of the South, LLC, practicing in Meridian, Mississippi. Their prescriptions cost Medicare Part D more than their services did: $489,297 for 4,416 claims, against $107,236 paid for services in 2024. Medtronic, Inc. was the largest of 12 companies reporting payments in 2025, $933.08 in all, mostly food and beverage. Lists Anderson Regional Medical Center as a hospital affiliation.
Overview
| NPI | 1205589157 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP |
| Sole proprietor | No |
| NPI issued | Feb 1, 2022 |
| Last updated in NPPES | Feb 1, 2022 |
| Certified by provider | Jan 21, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 905115 | MS |
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 - Nurse Practitioner (MS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,017 |
|---|---|
| Services billed | 3,015 across 30 procedure codes |
| Paid by Medicare | $107,236 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,416 · 10,212 30-day fills |
|---|---|
| Patients | 1,074 |
| Total drug cost | $489,297 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Cardiovascular Institute of the South, LLCLafayette, LA · 146 clinicians
Hospital affiliation
- Anderson Regional Medical CenterMeridian, MS
Industry payments (Open Payments)
- 2025$933.08 · 39 payments from 12 companies
- 2024$776.18 · 52 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $185.29 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $157.54 | 4 |
| Pfizer Inc. | $137.60 | 9 |
| Merck Sharp & Dohme LLC | $111.79 | 5 |
| Novartis Pharmaceuticals Corporation | $97.39 | 6 |
What the 2025 payments were for
- Food and Beverage$933.08 · 39 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 137 family nurse practitioners in Meridian · All family nurse practitioners in Mississippi