DR. LEIGH C CHAO MD
NPI 1922081348
Emergency Medicine in Saint Louis, MO

Q: What is Leigh Chao's NPI number?

The NPI number for Leigh Chao is 1922081348. It was assigned to this individual provider in the NPPES registry on November 21, 2005.

Q: What is Leigh Chao's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Leigh Chao was last updated on July 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since November 21, 2005PECOS EnrolledAccepts Medicare Assignment

11133 DUNN RD, DEPT EMERGENCY MED, SAINT LOUIS, MO 63136(314) 362-9123(314) 747-9160 Get Directions Write a Review

NPPES record last updated: July 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

On this page

About Dr. Leigh C Chao Md NPPES

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

DR. LEIGH C CHAO MD (NPI 1922081348) is an individual emergency medicine provider in Saint Louis, Missouri, licensed in Missouri (112947) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Osf Saint Anthony's Health Center, and is a graduate of Saint Louis University School Of Medicine (1996).

NPPES Registry Identity

NPI1922081348

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameDR. LEIGH C CHAOCredential: MD

Location Address11133 DUNN RD, DEPT EMERGENCY MEDSaint Louis, MO 63136-6163

Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 362-9123 · Fax (314) 747-9160

Phone(314) 362-9123

Fax(314) 747-9160

Sole ProprietorNo

Medical School CMSSaint Louis University School Of MedicineGraduated 1996

Enumeration DateNovember 21, 2005

Last NPPES UpdateJuly 14, 2025

NPPES CertifiedDecember 9, 2019

✔ NPI 1922081348 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in MO · 112947

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.

11133 DUNN RD, Saint Louis, MO 63136

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Leigh C Chao 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.

PECOS PAC ID446233118

PECOS Enrollment IDI20040611001414, I20070718000036

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 3

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 high level of medical decision making 99285

An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.

98 services94 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

72 services70 patients

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.

42 services42 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Osf Saint Anthony's Health Center

Acute Care Hospitals · Alton, IL

2/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140052

LocationSt Anthony's WayAlton, IL 62002 · Madison County

Memorial Hospital

Critical Access Hospitals · Chester, IL

OwnershipGovernment - Hospital District or Authority

CMS Certification Number141338

Location1900 State StChester, IL 62233 · Randolph County

Emergency services

Christian Hospital Northeast

Acute Care Hospitals · Saint Louis, MO

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number260180

Location11133 Dunn RoadSaint Louis, MO 63136 · St. Louis County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63136 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

$86.32 typical visit price

range $55.65 – $169.38

Typical copayment $21.58 (range $13.91 – $42.34)

Most-billed visit code 99203

Established Patient

$98.37 typical visit price

range $17.76 – $137.92

Typical copayment $24.59 (range $4.44 – $34.48)

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.

ALEXANDER SEXTRO CAA

Anesthesiologist Assistant

11133 DUNN RD
SAINT LOUIS, MO 63136

St. Louis County (314) 653-5000

DR. HILTON I PRICE MD

Radiology (Diagnostic Radiology)

11133 DUNN RD, DEPT RADIOLOGY
SAINT LOUIS, MO 63136

St. Louis County (314) 362-7200

LESLEY ANN HANSON D.O.

Internal Medicine (Critical Care Medicine)

11133 DUNN RD
SAINT LOUIS, MO 63136

St. Louis County (314) 317-0600

MARY A. RUDLOFF M.D.

Pathology (Anatomic Pathology)

11133 DUNN RD, DEPT. OF PATHOLOGY
SAINT LOUIS, MO 63136

St. Louis County (314) 653-5630

ELYSHA M KACHEVAS

Nurse Practitioner (Family)

11133 DUNN RD, SUITE 2335
SAINT LOUIS, MO 63136

St. Louis County (314) 653-5007

DR. GRACE ELIZABETH MONTES MD

Emergency Medicine

11133 DUNN RD, DEPT EMERGENCY MED
SAINT LOUIS, MO 63136

St. Louis County (314) 362-9123

MS. CHRISTIE MARIE KEEN FNP

Nurse Practitioner

11133 DUNN RD, DEPT EMERGENCY MED
SAINT LOUIS, MO 63136

St. Louis County (314) 362-9123

CHRISTIAN HOSPITAL NORTHEAST

Psychiatric Unit

11133 DUNN RD
SAINT LOUIS, MO 63136

St. Louis County (314) 653-5582

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 Leigh Chao's NPI number?

The NPI number for Leigh Chao is 1922081348. It was assigned to this individual provider in the NPPES registry on November 21, 2005.

Where is Leigh Chao located?

Leigh Chao practices at 11133 Dunn Rd Dept Emergency Med, Saint Louis, MO 63136. The listed phone number is (314) 362-9123.

What is Leigh Chao's specialty?

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

Is Leigh Chao enrolled in Medicare?

Yes. Leigh Chao 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.

Is Leigh Chao affiliated with any hospitals?

According to CMS data, Leigh Chao is affiliated with Osf Saint Anthony's Health Center, Memorial Hospital and Christian Hospital Northeast.

When was this NPI record last updated?

The NPPES record for Leigh Chao was last updated on July 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.