Mark Y. Liang, M.D.
NPI 1578889416ActiveIndividual· Internal Medicine· Fremont, CA
Internal Medicine (M.D.) in Fremont, California, trained at Temple University School of Medicine (class of 2010). 296 Medicare patients in 2024, $150,525 paid; nearly all of their 3,851 Part D prescriptions were generic (95%).
Overview
| NPI | 1578889416 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 16, 2010 |
| Last updated in NPPES | Apr 13, 2022 |
| Certified by provider | Apr 13, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A119336 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 296 |
|---|---|
| Services billed | 1,226 across 20 procedure codes |
| Paid by Medicare | $150,525 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,851 · 11,100 30-day fills |
|---|---|
| Patients | 428 |
| Total drug cost | $181,431 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | Temple University School of Medicine |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Hospitalist |
| Telehealth | Offers telehealth |
Medical group
- Washington Township Medical FoundationFremont, CA · 117 clinicians
Hospital affiliation
- Washington HospitalFremont, 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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All 147 internal medicine physicians in Fremont · All internal medicine physicians in California