Gregory Grimberg, MD
NPI 1104245307ActiveIndividual· Surgery· Mason City, IA
Surgery (MD) in Mason City, Iowa, trained at State University of New York Downstate Medical Center (class of 2014). 135 Medicare patients in 2024, $85,685 paid; nearly all of their 150 Part D prescriptions were generic (90%). Davol Inc. was the largest of 5 companies reporting payments in 2025, $276.15 in all, mostly food and beverage.
Overview
| NPI | 1104245307 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 15, 2014 |
| Last updated in NPPES | Aug 28, 2020 |
| Certified by provider | Aug 28, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | MD-47527 | IA |
| Surgery | 208600000X | D86982 | MD |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - General Surgery (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 135 |
|---|---|
| Services billed | 1,349 across 48 procedure codes |
| Paid by Medicare | $85,685 |
Part D prescriptions in 2024
| Prescriptions (claims) | 150 · 170 30-day fills |
|---|---|
| Patients | 46 |
| Total drug cost | $6,710 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | State University of New York Downstate Medical Center |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | General Surgery |
Medical group
- North Iowa Mercy ClinicsMason City, IA · 302 clinicians
Hospital affiliations
- Floyd County Medical CenterCharles City, IA
- Mercyone North Iowa Medical CenterMason City, IA
- Mitchell County Regional HealthOsage, IA
- Palo Alto County HospitalEmmetsburg, IA
Industry payments (Open Payments)
- 2025$276.15 · 7 payments from 5 companies
- 2024$191.33 · 7 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Davol Inc. | $162.90 | 1 |
| Convatec Inc. | $48.23 | 2 |
| Medtronic, Inc. | $31.72 | 2 |
| Phathom Pharmaceuticals, Inc. | $17.15 | 1 |
| Tela Bio, Inc. | $16.15 | 1 |
What the 2025 payments were for
- Food and Beverage$276.15 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Surgery providers in Mason City
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- 1699763268