Alexandra Joseph Chastant, MD
NPI 1134623903ActiveIndividual· Allergy & Immunology· Lafayette, LA
Allergy & Immunology (MD) in Lafayette, Louisiana, trained at Louisiana State University School of Medicine in New Orleans (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $77,809 for 407 claims, against $3,543 paid for services in 2024. Genzyme Corporation was the largest of 13 companies reporting payments in 2025, $682.66 in all, mostly food and beverage.
Overview
| NPI | 1134623903 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 19, 2018 |
| Last updated in NPPES | Jan 2, 2024 |
| Certified by provider | Jan 2, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Allergy & Immunology Primary | 207K00000X | 338387 | 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 - Allergy/Immunology (LA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 31 |
|---|---|
| Services billed | 82 across 10 procedure codes |
| Paid by Medicare | $3,543 |
Part D prescriptions in 2024
| Prescriptions (claims) | 407 · 638 30-day fills |
|---|---|
| Patients | 81 |
| Total drug cost | $77,809 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Louisiana State University School of Medicine in New Orleans |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Allergy/Immunology |
Medical group
- Allergy Asthma and Immunology Center of Southwest LouisianaLafayette, LA · 3 clinicians
Hospital affiliation
- Ochsner Lafayette General Medical CenterLafayette, LA
Industry payments (Open Payments)
- 2025$682.66 · 27 payments from 13 companies
- 2024$405.75 · 10 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $196.60 | 4 |
| Csl Behring | $80.60 | 4 |
| Ars Pharmaceuticals Operations, Inc. | $69.87 | 3 |
| Astrazeneca Pharmaceuticals LP | $68.99 | 4 |
| Grifols USA, LLC | $49.51 | 2 |
What the 2025 payments were for
- Food and Beverage$682.66 · 27 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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