DR. WILLIAM T CHAO (M.D.) – Neonatal-Perinatal Medicine Physician, NPI 1922063205
Neonatal-Perinatal Medicine Physician
Main info
Profile Insights
NPPES metrics only — not quality of care.
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Provider Addresses for DR. WILLIAM T CHAO (M.D.)
621, South New Ballas Road, Creve Coeur, Saint Louis County, Missouri, 63141, United States
SAINT LOUIS, MO 631418241
Phone: (314) 251-5860
Fax: (314) 251-5861
Type: Mailing
Saint Johns Mercy Medical Center, 615, South New Ballas Road, Creve Coeur, Saint Louis County, Missouri, 63141, United States
SAINT LOUIS, MO 631418221
Phone: (314) 251-6450
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
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Medicare Enrollment & Revalidation
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PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2016-09-16
PECOS data refreshed: 2026-05-27
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Medicare Utilization (FFS)
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No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 63141)
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