Gretchen Elizabeth Farmer, MD
NPI 1720283450ActiveIndividual· Internal Medicine· Union, MO
Internal Medicine (MD) in Union, Missouri, trained at Saint Louis University School of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $1,186,781 for 10,385 claims, against $32,009 paid for services in 2024. Novo Nordisk Inc was the largest of 20 companies reporting payments in 2025, $1,044 in all, mostly food and beverage.
Overview
| NPI | 1720283450 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 21, 2007 |
| Last updated in NPPES | Jun 24, 2024 |
| Certified by provider | Jun 24, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2007005528 | MO |
| Pediatrics | 208000000X | 2007005528 | MO |
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 - Internal Medicine (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 80 |
|---|---|
| Services billed | 834 across 36 procedure codes |
| Paid by Medicare | $32,009 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,385 · 19,125 30-day fills |
|---|---|
| Patients | 422 |
| Total drug cost | $1,186,781 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Pediatric Medicine |
Medical group
- Mercy Clinic East CommunitiesSaint Louis, MO · 571 clinicians
Hospital affiliations
- Mercy Hospital St LouisSaint Louis, MO
- Mercy Hospital WashingtonWashington, MO
Other facilities
- Mercy Home HealthHome health agency · Saint Louis, MO
- Mercy HospiceHospice · Saint Louis, MO
Industry payments (Open Payments)
- 2025$1,044 · 49 payments from 20 companies
- 2024$1,177 · 62 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $144.13 | 9 |
| Otsuka America Pharmaceutical, Inc. | $103.96 | 4 |
| Collegium Pharmaceutical, Inc. | $93.51 | 5 |
| Lundbeck LLC | $77.08 | 2 |
| Astrazeneca Pharmaceuticals LP | $74.52 | 3 |
What the 2025 payments were for
- Food and Beverage$966.85 · 47 payments
- Education$77.08 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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