Leigh C. Chao, MD
Emergency Medicine Physician · Saint Louis, MO
Leigh C. Chao, MD is an emergency medicine physician with a practice address in Saint Louis, Missouri, and NPI 1922081348, issued on Nov 21, 2005. Check the license (Missouri 112947, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Leigh C. Chao
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 112947 MO
Self-reported in NPPES; status is on the state search - Practice location
- 11133 Dunn RD, Saint Louis, MO 63136
- Phone
- (314) 362-9123
- Enumerated
- Nov 21, 2005
- Record last updated
- Jul 14, 2025
- Fax
- (314) 747-9160
- Medicare enrollment
- Enrolled (PECOS I20040611001414); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,405 in Missouri → Look up another NPI →
Also registered at 11133 Dunn RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Faqir Ahmad, MDEmergency Medicine Physician1487684957
- Olaronke Akintola-Ogunremi, M.D.Anatomic Pathology & Clinical Pathology Physician1578545612
- Anah Ali, MDEmergency Medicine Physician1942597992
- Anna Arnold, PAPhysician Assistant1447882584
- Ola Bamimore, MDEmergency Medicine Physician1992947832
- Jenny Bao, MDEmergency Medicine Physician1275947095
Verify Leigh C. Chao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 112947Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
65% fewer Medicare Part D claims than the average emergency medicine physician in 2024
80 Medicare Part D claims for 65 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
3 hospitals and group practices
- Memorial HospitalChester, IL · Acute Care Hospitals5 of 5 stars
- Alton-Griffin Emergency Group PCAlton, IL
- Washington University Community Specialists, LLCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Leigh C. Chao among 1,405 emergency medicine physician records in Missouri
Leigh C. Chao, MD is one of 1,405 emergency medicine physician records with a practice address in Missouri. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1996 · median 2012 among the 808 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
398 emergency medicine physician records list a practice address in Saint Louis
They are 398 of the 27,605 NPPES records with a practice address in Saint Louis, and 1,405 emergency medicine physician records in Missouri.
All 1,405 in Missouri → Every provider in Saint Louis → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Faqir Ahmad, MDSaint Louis, MO 631361487684957
- Anah Ali, MDSaint Louis, MO 631361942597992
- Ola Bamimore, MDSaint Louis, MO 631361992947832
- Jenny Bao, MDSaint Louis, MO 631361275947095
- Joshua Helm, MDSaint Louis, MO 631361356962476
- Nicholas Karlow, MDSaint Louis, MO 631361922669167
- Sivasankara Konala, MDSaint Louis, MO 631361538104229
- Grace Montes, MDSaint Louis, MO 631361023478542
Common questions
What is Leigh C. Chao, MD's NPI number?
Leigh C. Chao, MD's National Provider Identifier (NPI) is 1922081348, issued on Nov 21, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Leigh C. Chao, MD located?
The NPPES record lists a practice address at 11133 Dunn RD, Saint Louis, MO, 63136. Phone: (314) 362-9123. Providers update this record themselves, so call before visiting.
How can I verify Leigh C. Chao, MD's license?
NPPES lists Missouri license number 112947, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Leigh C. Chao, MD prescribe under Medicare Part D?
In 2024, Leigh C. Chao, MD had 80 Medicare Part D claims for 65 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.