Juanita L. Merchant, MD, PHD
NPI 1164505095ActiveIndividual· Internal Medicine, Gastroenterology· Ann Arbor, MI
Internal Medicine, Gastroenterology (MD, PHD) in Ann Arbor, Michigan, trained at Yale University School of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $373,315 for 187 claims, against $14,495 paid for services in 2024. Amgen Inc. was the largest of 3 companies reporting payments in 2025, $222.37 in all, mostly food and beverage.
Overview
| NPI | 1164505095 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PHD |
| Sole proprietor | No |
| NPI issued | Oct 23, 2006 |
| Last updated in NPPES | Mar 22, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 4301058085 | MI |
| Internal Medicine | 207R00000X | 4301058085 | MI |
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 (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 104 |
|---|---|
| Services billed | 143 across 26 procedure codes |
| Paid by Medicare | $14,495 |
Part D prescriptions in 2024
| Prescriptions (claims) | 187 · 312 30-day fills |
|---|---|
| Patients | 76 |
| Total drug cost | $373,315 |
| Generic share | 65% of claims |
Education and affiliations
| Medical school | Yale University School of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Gastroenterology |
Medical group
- Banner-University Medical GroupTucson, AZ · 1,072 clinicians
Hospital affiliations
Industry payments (Open Payments)
- 2025$222.37 · 3 payments from 3 companies
- 2024$81.96 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $143.16 | 1 |
| Astrazeneca Pharmaceuticals LP | $54.13 | 1 |
| Abbvie Inc. | $25.08 | 1 |
What the 2025 payments were for
- Food and Beverage$222.37 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 96 gastroenterologists in Ann Arbor · All gastroenterologists in Michigan