Lauren Mestayer Barfield, M.D.
NPI 1437341252ActiveIndividual· Internal Medicine· Baton Rouge, LA
Internal Medicine (M.D.) in Baton Rouge, Louisiana, trained at Louisiana State University School of Medicine in New Orleans (class of 2005). Their prescriptions cost Medicare Part D more than their services did: $1,176,826 for 9,387 claims, against $53,076 paid for services in 2024. Lilly USA, LLC was the largest of 21 companies reporting payments in 2025, $1,732 in all, mostly food and beverage.
Overview
| NPI | 1437341252 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 15, 2007 |
| Last updated in NPPES | Jan 7, 2021 |
| Certified by provider | Jan 7, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | MD200981 | LA |
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 - Internal Medicine (LA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 212 |
|---|---|
| Services billed | 777 across 22 procedure codes |
| Paid by Medicare | $53,076 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,387 · 20,989 30-day fills |
|---|---|
| Patients | 868 |
| Total drug cost | $1,176,826 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Louisiana State University School of Medicine in New Orleans |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Internal Medicine |
Medical group
- Our Lady of the Lake Physician Group LLCBaton Rouge, LA · 644 clinicians
Hospital affiliations
- Our Lady of the Lake Regional Medical CenterBaton Rouge, LA
- Womans HospitalBaton Rouge, LA
Other facilities
- Amedisys Home HealthHome health agency · Baton Rouge, LA
- Elara CaringHome health agency · Baton Rouge, LA
Industry payments (Open Payments)
- 2025$1,732 · 103 payments from 21 companies
- 2024$2,342 · 144 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $299.22 | 17 |
| Glaxosmithkline, LLC. | $220.53 | 11 |
| Novo Nordisk Inc | $195.06 | 12 |
| Pfizer Inc. | $189.50 | 10 |
| Astrazeneca Pharmaceuticals LP | $144.53 | 14 |
What the 2025 payments were for
- Food and Beverage$1,732 · 103 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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