DR. ALEX YANG MD
NPI 1538749353
Emergency Medicine in San Francisco, CA
About Dr. Alex Yang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ALEX YANG MD (NPI 1538749353) is an individual emergency medicine provider in San Francisco, California, licensed in California (A194927) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Oakland Univ, William Beaumont School Of Medicine (2021).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Alex Yang Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Alex Yang reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94116
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Alex Yang's NPI number?
The NPI number for Alex Yang is 1538749353. It was assigned to this individual provider in the NPPES registry on April 14, 2021.
Where is Alex Yang located?
Alex Yang practices at 505 Parnassus Ave, San Francisco, CA 94143. The listed phone number is (415) 353-1238.
What is Alex Yang's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Alex Yang enrolled in Medicare?
Yes. Alex Yang is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Alex Yang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Alex Yang reassigns Medicare benefits to 4 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), Permanente Medical Group Inc (San Francisco, CA) and University Of California Sfgh Medical Group (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alex Yang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Alex Yang was last updated on September 18, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Alex Yang, MD · NPI 1538749353
Emergency Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since April 14, 2021.
## Identity
- **NPI:** 1538749353 (Entity type: Individual)
- **Enumerated:** April 14, 2021
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A194927 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 505 PARNASSUS AVE, San Francisco, CA 94143-2204
- **Phone:** (415) 353-1238 · **Fax:** (415) 353-1799
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Permanente Medical Group Inc (NPI 1841373800, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Oakland Univ, William Beaumont School Of Medicine, class of 2021
## Record status
- **NPPES last updated:** September 18, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1538749353) · Data from the CMS NPPES public registry.