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

Dr. Opeyemi Ayeni, MD

Individual provider Hospitalist Physician · NPI 1831541325

Dr. Opeyemi Ayeni, MD is a Hospitalist in Chesterfield, Missouri. Qualified in 2008, 18 years ago. Practices with Mercy ACO Clinical Services Inc, a 138-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
18
Licensed in
MO
In the registry since
2016
Specialties on file
2
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

15740 S Outer 40 Rd
Chesterfield, MO 63017-2004
Phone: (636) 735-4750
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2019022222 (MO)
Hospitalist Physician Taxonomy 208M00000X · Licence 2019022222 (MO)

Record details

NPI number1831541325
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 7, 2016
Last updated in NPPESFebruary 13, 2025
Certification dateFebruary 13, 2025

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Group practice Mercy Aco Clinical Services Inc — 138 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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