Alex Yang, MD
NPI 1538749353 · Emergency Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alex Yang, MD is a Emergency Medicine Physician provider in San Francisco, CA (NPI 1538749353).
Provider details
- NPI number
- 1538749353
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A194927 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
114 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 46 | $185 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 35 | $128 |
| Ultrasound of Heart, Follow-Up93308 | 22 | $28 |
| Ultrasound Scan of Chest76604 | 11 | $29 |
Typical Medicare-allowed amounts for these services range $28–$185 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 1001 Potrero AvenueBldg 25San Francisco, CA 94110Phone: (415) 206-5752Fax: (415) 206-5818
- Maimonides Medical Center4802 10th AvenueBrooklyn, NY 11219Phone: (718) 283-6000
Registry dates
- Enumerated
- 2021-04-14
- Last updated
- 2024-09-18
- Certified
- 2024-09-18
Frequently asked questions
- What is Alex Yang's NPI number?
- Alex Yang's National Provider Identifier (NPI) is 1538749353, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alex Yang's specialty?
- Alex Yang is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alex Yang located?
- Alex Yang's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-2204.
- What is Alex Yang's phone number?
- The practice phone number listed in the NPPES registry for Alex Yang is (415) 353-1238.
- Does Alex Yang accept Medicare?
- Alex Yang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alex Yang's NPI active?
- Yes — Alex Yang's NPI (1538749353) is active in the NPPES registry as of the last update on 2024-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.