Quick answers
- Which hospitals does Oladele O. Ajao work at?
- Medicare's official clinician data lists Oladele O. Ajao at 2 hospitals: Anderson Hospital and Gateway Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Oladele O. Ajao see patients?
- Medicare's clinician data lists 1 practice location in Granite City, IL. Call before your visit to confirm the address.
- What is Oladele O. Ajao's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Infectious Disease.
- Does Oladele O. Ajao accept Medicare assignment?
- Yes. Medicare's clinician data says Oladele O. Ajao accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Oladele O. Ajao?
- (618) 332-0953, as listed in official Medicare / NPI Registry data.
- What is Oladele O. Ajao's NPI number?
- 1700829025. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Oladele O. Ajao works
Medicare's Facility Affiliation Data lists Oladele O. Ajao at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Anderson HospitalMaryville, IL · Acute Care Hospital · CCN 140289
- Gateway Regional Medical CenterGranite City, IL · Acute Care Hospital · CCN 140125
Practice locations
Addresses where Oladele O. Ajao is enrolled with Medicare (CMS data updated 2026-10-02).
- 2166 Madison AveGranite City, IL 62040 (618) 332‑0953
Group practices
Medicare enrollment lists Oladele O. Ajao as a member of this group (CMS data updated 2026-10-02).
- Southern Illinois Healthcare Foundation Inc119 clinicians in the group
Specialties
- Internal Medicineprimary
- Infectious Diseasealso
Other internal medicine doctors in Granite City
Clinicians with the same Medicare primary specialty in Granite City, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1700829025 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians