Steven J. Koga, M.D.
NPI 1144275512ActiveIndividual· Internal Medicine· Caldwell, ID
Internal Medicine (M.D.) in Caldwell, Idaho, trained at University of Texas Southwestern Medical School at Dallas (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $596,419 for 10,988 claims, against $55,766 paid for services in 2024. Exeltis, USA Inc. was the largest of 2 companies reporting payments in 2025, $55.73 in all, mostly food and beverage.
Overview
| NPI | 1144275512 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 24, 2006 |
| Last updated in NPPES | Jan 28, 2022 |
| Certified by provider | Nov 27, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | M6779 | ID |
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 - Internal Medicine (ID) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 250 |
|---|---|
| Services billed | 5,349 across 45 procedure codes |
| Paid by Medicare | $55,766 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,988 · 22,417 30-day fills |
|---|---|
| Patients | 669 |
| Total drug cost | $596,419 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Texas Southwestern Medical School at Dallas |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Internal Medicine |
Medical group
- West Valley Medical Group LLCCaldwell, ID · 8 clinicians
Hospital affiliations
- St Luke's Nampa Medical CenterNampa, ID
- St Luke's Regional Medical CenterBoise, ID
- West Valley Medical CenterCaldwell, ID
Other facilities
- Horizon Home Health WestHome health agency · Caldwell, ID
- Journeys HospiceHospice · Nampa, ID
Industry payments (Open Payments)
- 2025$55.73 · 3 payments from 2 companies
- 2024$27.33 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exeltis, USA Inc. | $36.21 | 2 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $19.52 | 1 |
What the 2025 payments were for
- Food and Beverage$55.73 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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