MARK Q ZHANG MD
NPI 1831620913
Emergency Medicine in Los Angeles, CA
About Mark Q Zhang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK Q ZHANG MD (NPI 1831620913) is an individual emergency medicine provider in Los Angeles, California, licensed in California (A157709) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS and is a graduate of University Of Southern California Keck School Of Medicine (2017).
NPPES Registry Identity
Specialties & Licenses
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
Mark Q Zhang 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
8Medicare enrollment records show Mark Zhang reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Los Angeles, CA 90033
- Reassigned Medicare billing, California enrollment
- 2,445 clinicians in this Medicare group
San Dimas, CA 91773
- Reassigned Medicare billing, California enrollment
- 75 clinicians in this Medicare group
Chino, CA 91710
- Reassigned Medicare billing, California enrollment
- 99 clinicians in this Medicare group
Bakersfield, CA 93301
- Reassigned Medicare billing, California enrollment
- 200 clinicians in this Medicare group
San Diego, CA 92111
- Reassigned Medicare billing, California enrollment
- 1,233 clinicians in this Medicare group
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 80 clinicians in this Medicare group
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 51 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 90017 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.
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 Mark Zhang's NPI number?
The NPI number for Mark Zhang is 1831620913. It was assigned to this individual provider in the NPPES registry on March 21, 2017.
Where is Mark Zhang located?
Mark Zhang practices at 1225 Wilshire Blvd, Los Angeles, CA 90017. The listed phone number is (213) 977-2121.
What is Mark Zhang's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mark Zhang enrolled in Medicare?
Yes. Mark Zhang 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 Mark Zhang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Zhang reassigns Medicare benefits to 8 organizations: Southern California Permanente Medical Group (Los Angeles, CA), Usc Care Medical Group, Inc (Los Angeles, CA), San Dimas Emergency Medical Associates Inc. (San Dimas, CA), Chino Emergency Medical Associates, Inc. (Chino, CA), Pinnacle Emergency Physicians Of Bakersfield, A Professional Corp (Bakersfield, CA) and 3 more organizations, listed in the Medicare section above. 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 Mark Zhang'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 Mark Zhang was last updated on December 3, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mark Q Zhang, MD · NPI 1831620913
Emergency Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since March 21, 2017.
## Identity
- **NPI:** 1831620913 (Entity type: Individual)
- **Enumerated:** March 21, 2017
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A157709 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1225 WILSHIRE BLVD, Los Angeles, CA 90017-1901
- **Phone:** (213) 977-2121
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Southern California Permanente Medical Group (NPI 1134151657, Los Angeles, CA); Usc Care Medical Group, Inc (NPI 1902846306, Los Angeles, CA); San Dimas Emergency Medical Associates Inc. (NPI 1720239460, San Dimas, CA); Chino Emergency Medical Associates, Inc. (NPI 1013282029, Chino, CA); Pinnacle Emergency Physicians Of Bakersfield, A Professional Corp (NPI 1386980415, Bakersfield, CA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Southern California Keck School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** December 3, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1831620913) · Data from the CMS NPPES public registry.