Gregory Diamonti, M.D.
NPI 1407810609ActiveIndividual· Internal Medicine, Gastroenterology· Hickory, NC
Internal Medicine, Gastroenterology (M.D.) in Hickory, North Carolina, trained at State University of Ny Upstate Medical University (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $242,935 for 404 claims, against $68,635 paid for services in 2024. Genzyme Corporation was the largest of 10 companies reporting payments in 2025, $742.96 in all, mostly food and beverage.
Overview
| NPI | 1407810609 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 14, 2006 |
| Last updated in NPPES | Jul 27, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 2002-00021 | NC |
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 - Gastroenterology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 371 |
|---|---|
| Services billed | 602 across 28 procedure codes |
| Paid by Medicare | $68,635 |
Part D prescriptions in 2024
| Prescriptions (claims) | 404 · 577 30-day fills |
|---|---|
| Patients | 144 |
| Total drug cost | $242,935 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | State University of Ny Upstate Medical University |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Gastroenterology |
Medical group
- Catawba Valley Medical Group IncHickory, NC · 135 clinicians
Hospital affiliations
- Catawba Valley Medical CenterHickory, NC
- Frye Regional Medical CenterHickory, NC
Industry payments (Open Payments)
- 2025$742.96 · 14 payments from 10 companies
- 2024$582.79 · 16 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $266.42 | 3 |
| Lilly USA, LLC | $113.23 | 1 |
| Ipsen Biopharmaceuticals, Inc | $113.19 | 1 |
| Madrigal Pharmaceuticals | $88.34 | 1 |
| Janssen Biotech, Inc. | $40.51 | 2 |
What the 2025 payments were for
- Food and Beverage$742.96 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in North Carolina →