Shizuka Erin Shishido, MPAS, PA-C, ATC,CSCS
NPI 1083641872ActiveIndividual· Physician Assistant· Torrance, CA
Physician Assistant (MPAS, PA-C, ATC,CSCS) with Steven E Davis MD Inc, practicing in Torrance, California. 251 Medicare patients in 2024, $41,105 paid; nearly all of their 442 Part D prescriptions were generic (92%). Regeneron Healthcare Solutions, Inc. was the largest of 6 companies reporting payments in 2025, $614.82 in all, mostly food and beverage. Lists Torrance Memorial Medical Center as a hospital affiliation.
Overview
| NPI | 1083641872 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MPAS, PA-C, ATC,CSCS |
| Sole proprietor | No |
| NPI issued | Jun 27, 2006 |
| Last updated in NPPES | Jul 11, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA21497 | CA |
| Specialist/Technologist, Athletic Trainer | 2255A2300X | — | — |
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 - Physician Assistant (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 251 |
|---|---|
| Services billed | 655 across 13 procedure codes |
| Paid by Medicare | $41,105 |
Part D prescriptions in 2024
| Prescriptions (claims) | 442 · 600 30-day fills |
|---|---|
| Patients | 167 |
| Total drug cost | $12,563 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Steven E Davis MD IncTorrance, CA · 4 clinicians
Hospital affiliation
- Torrance Memorial Medical CenterTorrance, CA
Industry payments (Open Payments)
- 2025$614.82 · 28 payments from 6 companies
- 2024$728.68 · 32 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $195.44 | 5 |
| Genzyme Corporation | $181.90 | 6 |
| Glaxosmithkline, LLC. | $178.65 | 14 |
| Optinose US, Inc. | $20.90 | 1 |
| Lilly USA, LLC | $19.23 | 1 |
What the 2025 payments were for
- Food and Beverage$502.45 · 26 payments
- Education$112.37 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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