Mercedes D. Wierman, ARNP
NPI 1003188236ActiveIndividual· Nurse Practitioner, Adult Health· Altamonte Springs, FL
Nurse Practitioner, Adult Health (ARNP) with Adventhealth Primary Care Network Inc, practicing in Altamonte Springs, Florida. Their prescriptions cost Medicare Part D more than their services did: $296,794 for 4,632 claims, against $38,006 paid for services in 2024. Merck Sharp & Dohme LLC reported $19.43 in payments in 2025, mostly food and beverage. Lists Adventhealth Fish Memorial and 1 other hospital as hospital affiliations.
Overview
| NPI | 1003188236 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP |
| Sole proprietor | No |
| NPI issued | Feb 3, 2012 |
| Last updated in NPPES | Oct 1, 2026 |
| Certified by provider | Sep 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Adult Health Primary | 363LA2200X | ARNP1266942 | FL |
| Nurse Practitioner, Family | 363LF0000X | ARNP1266942 | FL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 176 |
|---|---|
| Services billed | 662 across 15 procedure codes |
| Paid by Medicare | $38,006 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,632 · 10,669 30-day fills |
|---|---|
| Patients | 457 |
| Total drug cost | $296,794 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Adventhealth Primary Care Network IncAltamonte Springs, FL · 450 clinicians
Hospital affiliations
- Adventhealth Fish MemorialOrange City, FL
- Adventhealth OrlandoOrlando, FL
Other facilities
- Adventhealth Home HealthHome health agency · Altamonte Springs, FL
- Amedisys Home HealthHome health agency · Altamonte Springs, FL
Industry payments (Open Payments)
- 2025$19.43 · 1 payment from 1 company
- 2024$23.57 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $19.43 | 1 |
What the 2025 payments were for
- Food and Beverage$19.43 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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