John Charles Merillat, MD
NPI 1346280229ActiveIndividual· Internal Medicine, Cardiovascular Disease· Modesto, CA
Internal Medicine, Cardiovascular Disease (MD) in Modesto, California, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $601,728 for 4,023 claims, against $305,010 paid for services in 2024. Biotronik Inc. was the largest of 2 companies reporting payments in 2025, $214.24 in all, mostly food and beverage.
Overview
| NPI | 1346280229 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 7, 2006 |
| Last updated in NPPES | Jan 15, 2021 |
| Certified by provider | Jan 15, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | G67546 | CA |
| Internal Medicine, Clinical Cardiac Electrophysiology | 207RC0001X | G67546 | CA |
| Internal Medicine, Interventional Cardiology | 207RI0011X | G67546 | CA |
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 - Cardiac Electrophysiology (CA); Practitioner - Cardiovascular Disease (Cardiology) (GU) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 976 |
|---|---|
| Services billed | 4,899 across 56 procedure codes |
| Paid by Medicare | $305,010 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,023 · 9,271 30-day fills |
|---|---|
| Patients | 532 |
| Total drug cost | $601,728 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Cardiac Electrophysiology |
Medical group
- Valley Heart Associates Medical Group IncTurlock, CA · 10 clinicians
Hospital affiliations
- Adventist Health SonoraSonora, CA
- Doctors Medical CenterModesto, CA
- Emanuel Medical CenterTurlock, CA
- Memorial Medical CenterModesto, CA
- Oak Valley Hospital DistrictOakdale, CA
Industry payments (Open Payments)
- 2025$214.24 · 6 payments from 2 companies
- 2024$711.81 · 21 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biotronik Inc. | $144.85 | 3 |
| Abbott Laboratories | $69.39 | 3 |
What the 2025 payments were for
- Food and Beverage$214.24 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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