Gregory K. Harter, MD
NPI 1134157415ActiveIndividual· Family Medicine· Waterloo, IA
Family Medicine (MD) in Waterloo, Iowa, trained at University of Iowa, Rj & L Carver College of Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $1,069,671 for 10,806 claims, against $194,488 paid for services in 2024. Pfizer Inc. was the largest of 21 companies reporting payments in 2025, $2,132 in all, mostly food and beverage.
Overview
| NPI | 1134157415 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 28, 2006 |
| Last updated in NPPES | Feb 4, 2022 |
| Certified by provider | Feb 4, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 26144 | IA |
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 - Family Practice (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 272 |
|---|---|
| Services billed | 4,296 across 62 procedure codes |
| Paid by Medicare | $194,488 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,806 · 20,400 30-day fills |
|---|---|
| Patients | 549 |
| Total drug cost | $1,069,671 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | University of Iowa, Rj & L Carver College of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical groups
- Unified Therapy Services, IncDubuque, IA · 120 clinicians
- Cedar Valley Medical Specialists PCCedar Falls, IA · 43 clinicians
Hospital affiliations
- Allen HospitalWaterloo, IA
- Mercyone Waterloo Medical CenterWaterloo, IA
- Sartori Memorial Hospital, IncCedar Falls, IA
Other facilities
- Centerwell Home HealthHome health agency · Hiawatha, IA
- Unitypoint at HomeHome health agency · Waterloo, IA
- Cedar Valley HospiceHospice · Waterloo, IA
Industry payments (Open Payments)
- 2025$2,132 · 127 payments from 21 companies
- 2024$2,320 · 141 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $381.91 | 27 |
| Astrazeneca Pharmaceuticals LP | $317.01 | 20 |
| Abbvie Inc. | $152.05 | 9 |
| Lilly USA, LLC | $149.02 | 13 |
| Novo Nordisk Inc | $147.29 | 7 |
What the 2025 payments were for
- Food and Beverage$2,132 · 127 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Family Medicine providers in Waterloo
- 1528248861
- 1548288160
- 1003013731
- 1932380334
- 1194238535
- 1083545024
- 1477161974
- 1902124175
- 1346877552
- 1184548588
- 1154072379
- 1588006613