Opeyemi Ayeni, M.D
Internal Medicine Physician · Chesterfield, MO
Opeyemi Ayeni, M.D is an internal medicine physician with a practice address in Chesterfield, Missouri, and NPI 1831541325, issued on Jul 7, 2016. Check the license (Missouri 2019022222, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Opeyemi Ayeni
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2019022222 MO
Self-reported in NPPES; status is on the state search - Practice location
- 15740 S Outer 40 RD, Chesterfield, MO 63017
- Phone
- (636) 735-4750
- Enumerated
- Jul 7, 2016
- Record last updated
- Feb 13, 2025
- Medicare enrollment
- Enrolled (PECOS I20190808000523); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 15740 S Outer 40 RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Victoria Alstadt-Johnson, FNP-BCFamily Nurse Practitioner1073071585
- Lizel Alvarado, PAPhysician Assistant1588835953
- Adrienne Arnone, NPFamily Nurse Practitioner1871945196
- Elizabeth Baker, NPAdult Health Nurse Practitioner1720310840
Verify Opeyemi Ayeni 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 2019022222Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average internal medicine physician in 2024
730 Medicare Part D claims for 208 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 33 claims were for opioids.
Most prescribed
- Eliquis64 claims
- Atorvastatin Calcium46 claims
- Prednisone31 claims
- Furosemide29 claims
- Pantoprazole Sodium28 claims
- Metoprolol Succinate26 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.
Bills Medicare through 2 group practices
- Mercy Aco Clinical Services IncChesterfield, MO
- Mercy Clinic Springfield CommunitiesBranson, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
142 internal medicine physician records list a practice address in Chesterfield
They are 142 of the 2,132 NPPES records with a practice address in Chesterfield, and 2,604 internal medicine physician records in Missouri.
All 142 in Chesterfield → All 2,604 in Missouri → Every provider in Chesterfield →
Other internal medicine physician records in Missouri
- Betty Abban, M.D.Springfield, MO1063893162
- Amer Abbas, MDSaint Louis, MO1508480666
- Fizza Abbas, MDSaint Louis, MO1588079230
- Marghoob Abbas, M.D.St Joseph, MO1588603781
- Muhammad Khalid Abbas, M.D.Springfield, MO1447877089
- Sundas Abbas, MDRichmond Heights, MO1649790486
- Hajira Abbasi, DOSaint Louis, MO1194036947
- Catey Abbott, DOSaint Louis, MO1699355347
- David Abbott, MDRichmond Heights, MO1568448850
- Wael Abduljaber, MDSaint Louis, MO1174101489
Common questions
What is Opeyemi Ayeni, M.D's NPI number?
Opeyemi Ayeni, M.D's National Provider Identifier (NPI) is 1831541325, issued on Jul 7, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Opeyemi Ayeni, M.D located?
The NPPES record lists a practice address at 15740 S Outer 40 RD, Chesterfield, MO, 63017. Phone: (636) 735-4750. Providers update this record themselves, so call before visiting.
How can I verify Opeyemi Ayeni, M.D's license?
NPPES lists Missouri license number 2019022222, 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 Opeyemi Ayeni, M.D prescribe under Medicare Part D?
In 2024, Opeyemi Ayeni, M.D had 730 Medicare Part D claims for 208 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.