Gregory Shoichi Ishimoto, M.D.
NPI 1164681896ActiveIndividual· Family Medicine· Manitowoc, WI
Family Medicine (M.D.) in Manitowoc, Wisconsin, trained at University of Southern California Keck School of Medicine (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $51,781 for 1,044 claims, against $27,401 paid for services in 2024.
Overview
| NPI | 1164681896 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 6, 2008 |
| Last updated in NPPES | Aug 29, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 56106-020 | WI |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 301 |
|---|---|
| Services billed | 412 across 16 procedure codes |
| Paid by Medicare | $27,401 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,044 · 1,091 30-day fills |
|---|---|
| Patients | 262 |
| Total drug cost | $51,781 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Emergency Medicine |
| Secondary specialties | Family Practice |
Medical groups
- American Specialty Physicians Group IncColusa, CA · 100 clinicians
- Orchard HospitalGridley, CA · 17 clinicians
Hospital affiliations
- Colusa Medical CenterColusa, CA
- Enloe HealthChico, CA
- Orchard HospitalGridley, CA
Other facilities
- Freedom Home Health and Hospice Care Services, IncHospice · Marysville, CA
- Gridley Post AcuteNursing home · Gridley, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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