Quick answers
- Which hospitals does Allan L. Ong work at?
- Medicare's official clinician data lists Allan L. Ong at 2 hospitals: OSF Saint Elizabeth MDL Center and Saint Anthony Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Allan L. Ong see patients?
- Medicare's clinician data lists 2 practice locations, including Rockford, IL and Peoria, IL. Call before your visit to confirm the address.
- What is Allan L. Ong's specialty?
- Medicare lists Hospitalist as the primary specialty, and also Internal Medicine.
- Does Allan L. Ong accept Medicare assignment?
- Yes. Medicare's clinician data says Allan L. Ong 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 Allan L. Ong?
- (815) 921-8929, as listed in official Medicare / NPI Registry data.
- What is Allan L. Ong's NPI number?
- 1760411367. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Allan L. Ong works
Medicare's Facility Affiliation Data lists Allan L. Ong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- OSF Saint Elizabeth MDL CenterPeru, IL · Acute Care Hospital · CCN 140110
- Saint Anthony Medical CenterRockford, IL · Acute Care Hospital · CCN 140233
Practice locations
Addresses where Allan L. Ong is enrolled with Medicare (CMS data updated 2026-10-02).
- 5666 E State StRockford, IL 61108 (815) 921‑8929
- 8600 State Route 91, Suite 130Peoria, IL 61615 (309) 683‑5050
Group practices
Medicare enrollment lists Allan L. Ong as a member of this group (CMS data updated 2026-10-02).
- OSF Multi-Specialty Group2,114 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Rockford
Clinicians with the same Medicare primary specialty in Rockford, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1760411367 |
| 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