Jeremy Fields, MD
NPI 1285844142ActiveIndividual· Internal Medicine, Gastroenterology· Ames, IA
Internal Medicine, Gastroenterology (MD) with McFarland Clinic PC, practicing in Ames, Iowa. Their prescriptions cost Medicare Part D more than their services did: $213,336 for 1,504 claims, against $134,412 paid for services in 2024. Micro-Tech Endoscopy USA, Inc. reported $22.34 in payments in 2025, mostly food and beverage. Lists Boone County Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1285844142 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 22, 2007 |
| Last updated in NPPES | Nov 11, 2020 |
| Certified by provider | Nov 11, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 37948 | IA |
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 - Gastroenterology (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 698 |
|---|---|
| Services billed | 2,009 across 65 procedure codes |
| Paid by Medicare | $134,412 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,504 · 2,138 30-day fills |
|---|---|
| Patients | 650 |
| Total drug cost | $213,336 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- McFarland Clinic PCAmes, IA · 363 clinicians
Hospital affiliations
- Boone County HospitalBoone, IA
- Mary Greeley Medical CenterAmes, IA
- Unitypoint Health - MarshalltownMarshalltown, IA
Industry payments (Open Payments)
- 2025$22.34 · 1 payment from 1 company
- 2024$63.67 · 5 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Micro-Tech Endoscopy USA, Inc. | $22.34 | 1 |
What the 2025 payments were for
- Food and Beverage$22.34 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Ames
- 1386036333
- 1811042310
- 1336137306
- 1285622274