John R. Tretter, M.D.
NPI 1346234564ActiveIndividual· Internal Medicine, Cardiovascular Disease· Casa Grande, AZ
Internal Medicine, Cardiovascular Disease (M.D.) with Premier Cardiovascular Center, PLC and 1 other group, practicing in Casa Grande, Arizona. Their prescriptions cost Medicare Part D more than their services did: $1,159,464 for 4,391 claims, against $141,137 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 17 companies reporting payments in 2025, $1,153 in all, mostly food and beverage. Lists Banner Casa Grande Medical Center as a hospital affiliation.
Overview
| NPI | 1346234564 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 2, 2005 |
| Last updated in NPPES | Oct 18, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 17169 | NY |
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) (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 798 |
|---|---|
| Services billed | 2,187 across 38 procedure codes |
| Paid by Medicare | $141,137 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,391 · 10,131 30-day fills |
|---|---|
| Patients | 776 |
| Total drug cost | $1,159,464 |
| Generic share | 73% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Medical groups
- Premier Cardiovascular Center, PLCChandler, AZ · 6 clinicians
- Stone Med LLCPhoenix, AZ · 2 clinicians
Hospital affiliation
- Banner Casa Grande Medical CenterCasa Grande, AZ
Industry payments (Open Payments)
- 2025$1,153 · 54 payments from 17 companies
- 2024$848.07 · 43 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $273.51 | 16 |
| E.R. Squibb & Sons, L.L.C. | $176.95 | 6 |
| Merck Sharp & Dohme LLC | $174.73 | 7 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $118.32 | 5 |
| Bridgebio Pharma, Inc. | $75.32 | 3 |
What the 2025 payments were for
- Food and Beverage$1,153 · 54 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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