Markus T. Leong, MD
NPI 1427136050ActiveIndividual· Emergency Medicine· South San Francisco, CA
Emergency Medicine (MD) in South San Francisco, California, trained at George Washington University School of Medicine (class of 2000). 433 Medicare patients in 2024, $72,064 paid; nearly all of their 196 Part D prescriptions were generic (91%).
Overview
| NPI | 1427136050 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 1, 2006 |
| Last updated in NPPES | Feb 14, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | A81198 | 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 - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 433 |
|---|---|
| Services billed | 780 across 28 procedure codes |
| Paid by Medicare | $72,064 |
Part D prescriptions in 2024
| Prescriptions (claims) | 196 · 200 30-day fills |
|---|---|
| Patients | 148 |
| Total drug cost | $3,086 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Cep America - CaliforniaPomona, CA · 1,292 clinicians
- San Francisco Emergency Medical AssociatesSan Francisco, CA · 75 clinicians
Hospital affiliations
- California Pacific Medical Center - Mission BernalSan Francisco, CA
- California Pacific Medical Center- Van Ness CampusSan Francisco, CA
- California Pacific Medical Ctr-Davies Campus HospSan Francisco, CA
- UCSF Health Saint Francis HospitalSan Francisco, CA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other emergency medicine physicians in South San Francisco
- 1750469383
- 1427204494
- 1205216728
- 1205369022
- 1386722999
- 1437598687
- 1447459177
- 1477085785
- 1538248273
- 1538374160
- 1710065313
- 1780143024
All 24 emergency medicine physicians in South San Francisco · All emergency medicine physicians in California