BILLY ZHANG MD
NPI 1871087957
Internal Medicine in Irvine, CA
About Billy Zhang Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
BILLY ZHANG MD (NPI 1871087957) is an individual internal medicine provider in Irvine, California, licensed in California (A173835) and active in the NPI registry since June 2018. He is enrolled in Medicare PECOS, maintains a secondary practice location in Brooklyn, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Billy 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 Reassignment
Medicare enrollment records show Billy Zhang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 1,699 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 92602 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 5
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 Billy Zhang's NPI number?
The NPI number for Billy Zhang is 1871087957. It was assigned to this individual provider in the NPPES registry on June 21, 2018.
Where is Billy Zhang located?
Billy Zhang practices at 13400 Jamboree Rd, Irvine, CA 92602. The listed phone number is (714) 263-9279.
What is Billy Zhang's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Billy Zhang enrolled in Medicare?
Yes. Billy 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 organization bills Medicare for Billy Zhang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Billy Zhang reassigns Medicare benefits to Providence Medical Foundation (Orange, CA). The 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 Billy 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 Billy Zhang was last updated on August 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Billy Zhang, MD · NPI 1871087957
Internal Medicine physician in Irvine, California. Individual provider, active in the CMS NPPES registry since June 21, 2018.
## Identity
- **NPI:** 1871087957 (Entity type: Individual)
- **Enumerated:** June 21, 2018
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** A173835 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 13400 JAMBOREE RD, Irvine, CA 92602-2308
- **Phone:** (714) 263-9279
## 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:** Providence Medical Foundation (NPI 1801443510, Orange, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** August 7, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1871087957) · Data from the CMS NPPES public registry.