Leigh C Chao, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

112947 Issued in MO

Practice address

11133 Dunn Rd
Dept Emergency Med
Saint Louis, MO 63136-6163

Phone

(314) 362-9123

Fax

(314) 747-9160

NPI assigned

Nov 21, 2005

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in IL, MO2 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 2

Specialty

Internal MedicineAlso: Emergency Medicine

Education

Saint Louis University School of Medicine, 1996

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Alton-Griffin Emergency Group PCGroup PAC ID 7315167103, 17 clinicians

Washington University Community Specialists LLCGroup PAC ID 8628588514, 94 clinicians

Memorial HospitalGroup PAC ID 5294649372, 29 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Osf Saint Anthony'S Health Center Hospital, Alton, IL, CCN 140052
• Christian Hospital Northeast Hospital, Saint Louis, MO, CCN 260180
• Memorial Hospital Hospital, Chester, IL, CCN 141338

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as group

Quality

95

Improvement activities

40

Cost

80.65

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: lchao134762@direct.carenet.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Washington University Community Specialists, LLC

  • Emergency Care Clinic/Center
  • Saint Louis, MO
  • NPI 1922812254
  Medicare reassignment Care Compare group NPD
• Alton-Griffin Emergency Group PC

  • Emergency Medicine Physician
  • Alton, IL
  • NPI 1891104824
  Medicare reassignment Care Compare group NPD
• Memorial Hospital

  • Critical Access Hospital
  • Chester, IL
  • NPI 1851390132
  Medicare reassignment Care Compare group NPD
• Cep America, LLC

  • Emergency Medicine Physician
  • Saint Louis, MO
  • NPI 1619332046
  Medicare reassignment NPD
• Midwest Emergency Good Samaritan, Inc

  • Emergency Medicine Physician
  • Mount Vernon, IL
  • NPI 1629367578
  Medicare reassignment NPD
• Southeastern Emergency Physicians of Memphis LLC

  • Emergency Medicine Physician
  • Alton, IL
  • NPI 1437105277

  MO

  Medicare reassignment NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Richmond Heights, MO
  • NPI 1942855366
  NPD
• Cep America LLC

  • Emergency Medicine Physician
  • Fort Lauderdale, FL
  • NPI 1700747946
  NPD
• Memorial Hospital

  • Institutional Pharmacy
  • Chester, IL
  • NPI 1023603289
  NPD
• BC Missouri Emergency Physicians, LLP

  • Emergency Medicine Physician
  • Saint Louis, MO
  • NPI 1003831678
  NPD (past)
• BC Missouri Emergency Physicians, LLP

  • Emergency Medicine Physician
  • Farmington, MO
  • NPI 1396760062
  NPD (past)
• BC Missouri Emergency Physicians, LLP

  • Emergency Medicine Physician
  • Sullivan, MO
  • NPI 1679598247
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Christian Hospital Northeast- Northwest

  • General Acute Care Hospital
  • Saint Louis, MO
  • NPI 1639186760
  Care Compare affiliation
• Christian Hospital Northeast-Northwest

  • Ambulance
  • Saint Louis, MO
  • NPI 1073769329

  Hospital

  Care Compare affiliation
• Memorial Hospital

  • Critical Access Hospital
  • Chester, IL
  • NPI 1851390132
  Care Compare affiliation
• Osf Healthcare System

  • General Acute Care Hospital
  • Alton, IL
  • NPI 1710396932
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1132531200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752451200000",
    "number": "1922081348",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7412011",
            "city": "CHICAGO",
            "state": "IL",
            "postal_code": "606742011",
            "telephone_number": "314-362-9123",
            "fax_number": "314-747-9160"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "11133 DUNN RD",
            "address_2": "DEPT EMERGENCY MED",
            "city": "SAINT LOUIS",
            "state": "MO",
            "postal_code": "631366163",
            "telephone_number": "314-362-9123",
            "fax_number": "314-747-9160"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHAO",
        "first_name": "LEIGH",
        "middle_name": "C",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-11-21",
        "last_updated": "2025-07-14",
        "certification_date": "2019-12-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "MO",
            "license": "112947",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://epicproxy.et0965.epichosted.com/FHIRProxy/api/FHIR/DSTU2/",
            "affiliation": "Y",
            "affiliationName": "Washington University",
            "address_1": "11133 Dunn Rd",
            "address_2": "Dept Emergency Med",
            "city": "Saint Louis",
            "state": "MO",
            "country_code": "US",
            "postal_code": "631366163",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Change and Development Institute, LLC
• Change Course, LLC
• Changing Lives Home Care Assistance Inc
• Changing Peoples Reaction Solutions LLC
• Alexa Chanos, MD
• William T Chao, M.D.
• Udita Chapagain, MD
• Cassidy Faith Chapman, PMHNP
• Jerry Richard Chapman
• Lena J Chapman, LPC

• Emergency Medicine Physician in Saint Louis, MO
• Providers in Saint Louis, MO by specialty
• Emergency Medicine Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 14, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.