Ada Ivette Mercado, MD
NPI 1982620811ActiveIndividual· Internal Medicine, Cardiovascular Disease· Canton, GA
Internal Medicine, Cardiovascular Disease (MD) with Wellstar Medical Group LLC, practicing in Canton, Georgia. Their prescriptions cost Medicare Part D more than their services did: $502,422 for 4,611 claims, against $69,668 paid for services in 2024. Amgen Inc. was the largest of 9 companies reporting payments in 2025, $480.03 in all, mostly food and beverage. Lists Wellstar Cobb Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1982620811 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 14, 2006 |
| Last updated in NPPES | Jan 19, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 51357 | GA |
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 - Cardiovascular Disease (Cardiology) (GA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 396 |
|---|---|
| Services billed | 1,128 across 25 procedure codes |
| Paid by Medicare | $69,668 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,611 · 10,255 30-day fills |
|---|---|
| Patients | 548 |
| Total drug cost | $502,422 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Wellstar Medical Group LLCMarietta, GA · 3,093 clinicians
Hospital affiliations
- Wellstar Cobb Medical CenterAustell, GA
- Wellstar Kennestone Regional Medical CenterMarietta, GA
- Wellstar North Fulton Medical CenterRoswell, GA
- Wellstar Paulding Medical CenterHiram, GA
Other facilities
- Wellstar Windy Hill HospitalLong-term care hospital · Marietta, GA
Industry payments (Open Payments)
- 2025$480.03 · 22 payments from 9 companies
- 2024$577.52 · 17 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $81.36 | 5 |
| E.R. Squibb & Sons, L.L.C. | $79.45 | 4 |
| Novartis Pharmaceuticals Corporation | $71.72 | 3 |
| Pfizer Inc. | $65.86 | 3 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $55.08 | 1 |
What the 2025 payments were for
- Food and Beverage$480.03 · 22 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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