Mark A. Johnson, DO
Opted out of Medicare from January 2026 to January 2028. Family Medicine (DO) in Meridian, Idaho, licensed in ID and WA, with an NPI issued in July 2008. Their prescriptions cost Medicare Part D more than their services did: $850,439 for 8,152 claims, against $69,935 paid for services in 2024. Pfizer Inc. was the largest of 25 companies reporting payments in 2025, $1,511 in all, mostly food and beverage. Lists Saint Alphonsus Regional Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1376707034 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Jul 11, 2008 |
| Last updated in NPPES | Aug 20, 2026 |
| Certified by provider | Aug 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | O-0583 | ID |
| Family Medicine | 207Q00000X | OL20000133 | WA |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jan 12, 2026 – Jan 12, 2028 |
| Can order and refer | Yes |
| Accepts assignment | Yes (participating) |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Medicare services in 2024
| Medicare patients | 175 |
|---|---|
| Services billed | 1,410 across 57 procedure codes |
| Paid by Medicare | $69,935 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,152 · 18,604 30-day fills |
|---|---|
| Patients | 438 |
| Total drug cost | $850,439 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Family Practice |
Hospital affiliations
- Saint Alphonsus Regional Medical CenterBoise, ID
- St Luke's Nampa Medical CenterNampa, ID
- St Luke's Regional Medical CenterBoise, ID
Other facilities
- Horizon Home HealthHome health agency · Meridian, ID
- Idaho Home Health & HospiceHospice · Twin Falls, ID
Industry payments (Open Payments)
- 2025$1,511 · 83 payments from 25 companies
- 2024$2,080 · 128 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $309.39 | 19 |
| Amgen Inc. | $194.71 | 13 |
| Astrazeneca Pharmaceuticals LP | $151.15 | 10 |
| Glaxosmithkline, LLC. | $104.89 | 5 |
| Phathom Pharmaceuticals, Inc. | $84.47 | 4 |
What the 2025 payments were for
- Food and Beverage$1,511 · 83 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 116 family medicine physicians in Meridian · All family medicine physicians in Idaho