John Whitney Mercer Jr., MD
NPI 1205988540ActiveIndividual· Obstetrics & Gynecology· Nampa, ID
Obstetrics & Gynecology (MD) with Saint Alphonsus Regional Medical Center Inc and 1 other group, practicing in Nampa, Idaho. Part D covered 17 prescriptions written in 2024, 100% of them generic. Otsuka America Pharmaceutical, Inc. was the largest of 5 companies reporting payments in 2025, $146.26 in all, mostly food and beverage. Lists Minden Medical Center as a hospital affiliation.
Overview
| NPI | 1205988540 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jan 17, 2007 |
| Last updated in NPPES | Sep 2, 2025 |
| Certified by provider | Sep 2, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 3971468 | ID |
| Obstetrics & Gynecology | 207V00000X | L023779 | LA |
| Obstetrics & Gynecology | 207V00000X | CDR.0000210 | CO |
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 - Obstetrics/Gynecology (CO); Practitioner - Obstetrics/Gynecology (ID); Practitioner - Obstetrics/Gynecology (LA); Practitioner - Obstetrics/Gynecology (WY) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 17 · 26 30-day fills |
|---|---|
| Total drug cost | $1,289 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Obstetrics/Gynecology |
Medical groups
- Saint Alphonsus Regional Medical Center IncBoise, ID · 680 clinicians
- Minden Physician Practices LLCMinden, LA · 44 clinicians
Hospital affiliation
- Minden Medical CenterMinden, LA
Industry payments (Open Payments)
- 2025$146.26 · 6 payments from 5 companies
- 2024$104.66 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $51.14 | 2 |
| Baxter Healthcare | $28.79 | 1 |
| Axsome Therapeutics, Inc. | $24.69 | 1 |
| Organon LLC | $23.75 | 1 |
| Millicent US Inc | $17.89 | 1 |
What the 2025 payments were for
- Food and Beverage$146.26 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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