Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Leigh C Chao, MD

Individual provider Emergency Medicine Physician · NPI 1922081348

Dr. Leigh C Chao, MD is an Internal Medicine in Saint Louis, Missouri. Graduated from Saint Louis University School of Medicine in 1996, 30 years ago. Practices with Alton-Griffin Emergency Group PC, a 15-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
30
Trained at
Saint Louis University School of Medicine
Licensed in
MO
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

11133 Dunn Rd Dept Emergency Med
Saint Louis, MO 63136-6163
Phone: (314) 362-9123
Fax: (314) 747-9160
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 112947 (MO)

Record details

NPI number1922081348
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 21, 2005
Last updated in NPPESJuly 14, 2025
Certification dateDecember 9, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesEMERGENCY MEDICINE
Medical schoolSAINT LOUIS UNIVERSITY SCHOOL OF MEDICINE
Graduated 1996 (30 years in practice)
Group practice Alton-Griffin Emergency Group Pc — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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