DR. STEPHEN TEKCHEE GAU M.D.
NPI 1942640354
Emergency Medicine in Irvine, CA
About Dr. Stephen Tekchee Gau M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. STEPHEN TEKCHEE GAU M.D. (NPI 1942640354) is an individual emergency medicine provider in Irvine, California, licensed in California (A141511) and active in the NPI registry since June 2013. He is enrolled in Medicare PECOS and is a graduate of Other (2013).
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
Dr. Stephen Tekchee Gau M.d. 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 Stephen Gau reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Laguna Hills, CA 92653
- Reassigned Medicare billing, California enrollment
- 1,204 clinicians in this Medicare group
Tustin, CA 92780
- Reassigned Medicare billing, California enrollment
- 121 clinicians in this Medicare group
Duarte, CA 91010
- Reassigned Medicare billing, California enrollment
- 1,335 clinicians in this Medicare group
San Bernardino, CA 92404
- Reassigned Medicare billing, California enrollment
- 1,216 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92618 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
IRVINE, CA 92618
IRVINE, CA 92618
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 Stephen Gau's NPI number?
The NPI number for Stephen Gau is 1942640354. It was assigned to this individual provider in the NPPES registry on June 29, 2013.
Where is Stephen Gau located?
Stephen Gau practices at 1000 Fivepoint, Irvine, CA 92618. The listed phone number is (800) 826-4673.
What is Stephen Gau's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Stephen Gau enrolled in Medicare?
Yes. Stephen Gau 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 Stephen Gau's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Stephen Gau reassigns Medicare benefits to 4 organizations: Cep America - California (Laguna Hills, CA), Can Emergency Physicians Medical Group Inc (Tustin, CA), City Of Hope Medical Foundation (Duarte, CA) and Inpatient Specialists Of California, PC (San Bernardino, 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 Stephen Gau'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 Stephen Gau was last updated on January 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months 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. Stephen Tekchee Gau, M.D. · NPI 1942640354
Emergency Medicine physician in Irvine, California. Individual provider, active in the CMS NPPES registry since June 29, 2013.
## Identity
- **NPI:** 1942640354 (Entity type: Individual)
- **Enumerated:** June 29, 2013
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A141511 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 FIVEPOINT, Irvine, CA 92618-2621
- **Phone:** (800) 826-4673
## 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): Cep America - California (NPI 1871534966, Laguna Hills, CA); Can Emergency Physicians Medical Group Inc (NPI 1386018356, Tustin, CA); City Of Hope Medical Foundation (NPI 1871886366, Duarte, CA); Inpatient Specialists Of California, PC (NPI 1952792475, San Bernardino, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** January 15, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1942640354) · Data from the CMS NPPES public registry.