Chiaching Wang, MD
NPI 1922260520ActiveIndividual· Internal Medicine, Hematology· San Francisco, CA
Internal Medicine, Hematology (MD) with University of California San Francisco and 1 other group, practicing in San Francisco, California. Their prescriptions cost Medicare Part D more than their services did: $1,079,648 for 287 claims, against $16,362 paid for services in 2024. Genentech, Inc. reported $163.95 in payments in 2025, mostly food and beverage. Lists UCSF Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1922260520 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 26, 2008 |
| Last updated in NPPES | Apr 30, 2026 |
| Certified by provider | Apr 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology Primary | 207RH0000X | A119101 | CA |
| Internal Medicine | 207R00000X | A119101 | CA |
| Internal Medicine, Medical Oncology | 207RX0202X | A119101 | CA |
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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 115 |
|---|---|
| Services billed | 184 across 10 procedure codes |
| Paid by Medicare | $16,362 |
Part D prescriptions in 2024
| Prescriptions (claims) | 287 · 336 30-day fills |
|---|---|
| Patients | 38 |
| Total drug cost | $1,079,648 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- University of California San FranciscoSan Francisco, CA · 1,839 clinicians
- University of California Sfgh Medical GroupSan Francisco, CA · 587 clinicians
Hospital affiliations
- UCSF Medical CenterSan Francisco, CA
- Zuckerberg San Francisco General Hosp & Trauma CtrSan Francisco, CA
Industry payments (Open Payments)
- 2025$163.95 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genentech, Inc. | $163.95 | 2 |
What the 2025 payments were for
- Food and Beverage$110.50 · 1 payment
- Education$53.45 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 18 Internal Medicine, Hematology providers in San Francisco · All Internal Medicine, Hematology providers in California