Doctor profile · Federal record
Dr. Markus Leong, MD
Emergency Medicine Physician (CMS: Emergency Medicine) · South San Francisco, CA
- NPI 1427136050
- Accepts Medicare
- MIPS 86.3 / 100 · 2023
- 26 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1200 El Camino Real
South San Francisco, CA 940803208
(650) 742-2000 - Mailing address
-
1800 Harrison St Fl 7
Oakland, CA 946123466
Credentials & registration
- NPI registered
- November 2006 — 20 yrs on file
- Profile last updated
- February 14, 2022
- Year of graduation
- 2000 — 26 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #A81198
- Medicaid
- CA #00A811980
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1427136050. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
564
Distinct HCPCS
5
Medicare allowed
$81,659
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99285 |
Emergency department visit with high level of medical decision making | 228 | 221 | $187 | |
99284 |
Emergency department visit with moderate level of medical decision making | 133 | 129 | $129 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 100 | 96 | $9 | |
99291 |
Critical care, first 30-74 minutes | 84 | 83 | $232 | |
99283 |
Emergency department visit with low level of medical decision making | 19 | 19 | $76 |
In context: peer comparison
Among 7 peers in South San Francisco Emergency Medicine Physician, average services per provider: 73. This provider delivers 7.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
59
Patients
57
Total drug cost
$523
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Cephalexin | Generic | 34 | 33 | $357 |
| Prednisone | Generic | 13 | 12 | $35 |
| Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) | Brand | 12 | 12 | $131 |
Frequently asked questions
What is Dr. Markus Leong's medical specialty?
Dr. Markus Leong practices Emergency Medicine Physician in South San Francisco, CA.
Where does Dr. Markus Leong practice?
Dr. Markus Leong practices at 1200 El Camino Real, South San Francisco, CA 940803208. Office phone: 6507422000.
What is Dr. Markus Leong's NPI?
Dr. Markus Leong's National Provider Identifier (NPI) is 1427136050, issued by NPPES.
Does Dr. Markus Leong accept Medicare assignment?
Yes. Dr. Markus Leong accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Markus Leong commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with moderate level of medical decision making (HCPCS 99284); Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (HCPCS 93010). Source: CMS Medicare Physician & Other Practitioners file.