Mariko Shimizu
NPI 1750813861ActiveIndividual· Psychiatry & Neurology, Psychiatry· Cambridge, MA
Psychiatry & Neurology, Psychiatry in Cambridge, Massachusetts, trained at University of Hawaii John A. Burns School of Medicine (class of 2017). 84 Medicare patients in 2024, $23,439 paid; nearly all of their 399 Part D prescriptions were generic (96%). Otsuka America Pharmaceutical, Inc. reported $50.00 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1750813861 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Mar 28, 2017 |
| Last updated in NPPES | Oct 9, 2023 |
| Certified by provider | Oct 9, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 286594 | MA |
| Psychiatry & Neurology, Psychiatry | 2084P0800X | MD-22378 | HI |
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 - Psychiatry (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 84 |
|---|---|
| Services billed | 334 across 16 procedure codes |
| Paid by Medicare | $23,439 |
Part D prescriptions in 2024
| Prescriptions (claims) | 399 · 446 30-day fills |
|---|---|
| Patients | 67 |
| Total drug cost | $23,927 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of Hawaii John A. Burns School of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- Cambridge Public Health CommissionEverett, MA · 656 clinicians
Hospital affiliation
- Cambridge Health AllianceCambridge, MA
Industry payments (Open Payments)
- 2025$50.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $50.00 | 1 |
What the 2025 payments were for
- Food and Beverage$50.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other psychiatrists in Cambridge
- 1144457243
- 1275093866
- 1578600763
- 1588168249
- 1598157323
- 1891851986
- 1003976150
- 1235769514
- 1306013065
- 1851367395
- 1013216712
- 1023065299
All 235 psychiatrists in Cambridge · All psychiatrists in Massachusetts