Johnny Cai, DO
NPI 1861998452ActiveIndividual· Internal Medicine, Hematology & Oncology· Dublin, CA
Internal Medicine, Hematology & Oncology (DO) in Dublin, California, trained at Touro Un College of Osteopathic Medicine, Vallejo (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $483,489 for 135 claims, against $32,353 paid for services in 2024. Takeda Pharmaceuticals U.S.A., Inc. was the largest of 11 companies reporting payments in 2025, $364.95 in all, mostly food and beverage.
Overview
| NPI | 1861998452 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 3, 2018 |
| Last updated in NPPES | Aug 28, 2024 |
| Certified by provider | Aug 28, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 20A19125 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 52 |
|---|---|
| Services billed | 3,379 across 33 procedure codes |
| Paid by Medicare | $32,353 |
Part D prescriptions in 2024
| Prescriptions (claims) | 135 · 184 30-day fills |
|---|---|
| Patients | 35 |
| Total drug cost | $483,489 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | Touro Un College of Osteopathic Medicine, Vallejo |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Sutter Bay Medical FoundationFremont, CA · 3,829 clinicians
Hospital affiliations
- Eden Medical CenterCastro Valley, CA
- Stanford Health Care Tri-ValleyPleasanton, CA
- Washington HospitalFremont, CA
Industry payments (Open Payments)
- 2025$364.95 · 15 payments from 11 companies
- 2024$243.55 · 7 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $93.16 | 4 |
| Daiichi Sankyo Inc. | $48.74 | 2 |
| Abbvie Inc. | $34.48 | 1 |
| Pfizer Inc. | $33.22 | 1 |
| Celgene Corporation | $27.91 | 1 |
What the 2025 payments were for
- Food and Beverage$364.95 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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