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LOUIS T CHAU M.D.
NPI 1225144918
Emergency Medicine in Corona, CA

Active since August 22, 2006PECOS Enrolled
800 S MAIN ST, CORONA, CA 92882(909) 736-6241(909) 736-6283 Get Directions Write a Review

NPPES record last updated: December 3, 2021. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Louis T Chau M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

LOUIS T CHAU M.D. (NPI 1225144918) is an individual emergency medicine provider in Corona, California, licensed in California (A64423) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1225144918
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameLOUIS T CHAUCredential: M.D.
Location Address800 S MAIN STCorona, CA 92882-3420
Mailing Address2100 Powell St, Suite 900Emeryville, CA 94608-1826 · (510) 350-2600 · Fax (510) 879-9100
Phone(909) 736-6241
Fax(909) 736-6283
Sole ProprietorNo
Enumeration DateAugust 22, 2006
Last NPPES UpdateDecember 3, 2021
✔ NPI 1225144918 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A64423
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
800 S MAIN ST, Corona, CA 92882
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Other Identifiers 1

Medicaid00A644230CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Louis T Chau M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims

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.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
28 services28 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92882 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$91.88 typical visit price
range $59.60 – $179.42
Typical copayment $22.97 (range $14.90 – $44.85)
Most-billed visit code 99203
Established Patient
$104.64 typical visit price
range $19.37 – $146.42
Typical copayment $26.16 (range $4.84 – $36.60)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

AARON DEATHERAGE
Student in an Organized Health Care Education/Training Program
800 S MAIN ST
CORONA, CA 92882
Riverside County (951) 737-4343
CRYSTAL SOULE
Dietitian, Registered
800 S MAIN ST
CORONA, CA 92882
Riverside County (951) 737-4343
CHERYL JANE SAPIDA P.A
Physician Assistant
800 S MAIN ST
CORONA, CA 92882
Riverside County (909) 736-6241
INTEGRATED ANESTHESIA MEDICAL GROUP PC
Anesthesiology (Pain Medicine)
800 S MAIN ST
CORONA, CA 92882
Riverside County (310) 379-2134
JEFFREY RIEKER M.D.
Anesthesiology
800 S MAIN ST
CORONA, CA 92882
Riverside County (951) 737-4343
SCOTT MATTHEW BROWN P.A.-C
Physician Assistant
800 S MAIN ST
CORONA, CA 92882
Riverside County (909) 736-6241
DHIREN PATEL FNP-C
Nurse Practitioner (Family)
800 S MAIN ST
CORONA, CA 92882
Riverside County (951) 737-4343
WENDY S MARTIN MD
Anesthesiology
800 S MAIN ST
CORONA, CA 92882
Riverside County (909) 737-4343

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 Louis Chau's NPI number?

The NPI number for Louis Chau is 1225144918. It was assigned to this individual provider in the NPPES registry on August 22, 2006.

Where is Louis Chau located?

Louis Chau practices at 800 S Main St, Corona, CA 92882. The listed phone number is (909) 736-6241.

What is Louis Chau's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Louis Chau enrolled in Medicare?

Yes. Louis Chau is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Louis Chau 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.