John Granquist, M.D.
NPI 1699821892ActiveIndividual· Internal Medicine, Cardiovascular Disease· Hartford, CT
Internal Medicine, Cardiovascular Disease (M.D.) in Hartford, Connecticut, trained at Tufts University School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $2,077,823 for 7,268 claims, against $271,340 paid for services in 2024. Novo Nordisk Inc reported $21.78 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1699821892 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 28, 2007 |
| Last updated in NPPES | Apr 25, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 045097 | CT |
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) (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 3,903 |
|---|---|
| Services billed | 8,112 across 43 procedure codes |
| Paid by Medicare | $271,340 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,268 · 19,590 30-day fills |
|---|---|
| Patients | 952 |
| Total drug cost | $2,077,823 |
| Generic share | 79% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical groups
- Hartford HospitalHartford, CT · 1,044 clinicians
- Midstate Medical CenterMeriden, CT · 186 clinicians
- Consulting Cardiologists PCWallingford, CT · 23 clinicians
Hospital affiliations
- Hartford HospitalHartford, CT
- Manchester Memorial HospitalManchester, CT
- Middlesex HospitalMiddletown, CT
- Midstate Medical CenterMeriden, CT
- William W Backus HospitalNorwich, CT
Industry payments (Open Payments)
- 2025$21.78 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $21.78 | 1 |
What the 2025 payments were for
- Food and Beverage$21.78 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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