Quick answers
- Which hospitals does Ronald J. Oconer work at?
- Medicare's official clinician data lists Ronald J. Oconer at 2 hospitals: Northwestern Medicine McHenry and The Monroe Clinic. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ronald J. Oconer see patients?
- Medicare's clinician data lists 8 practice locations, including Huntley, IL, Hoffman Estates, IL and Oak Brook, IL. Call before your visit to confirm the address.
- What is Ronald J. Oconer's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Ronald J. Oconer accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald J. Oconer 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 Ronald J. Oconer?
- (224) 654-0800, as listed in official Medicare / NPI Registry data.
- What is Ronald J. Oconer's NPI number?
- 1649473729. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ronald J. Oconer works
Medicare's Facility Affiliation Data lists Ronald J. Oconer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
- The Monroe ClinicMonroe, WI · Acute Care Hospital · CCN 520028
Practice locations
Addresses where Ronald J. Oconer is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 8; the Medicare profile lists all.
- 10400 Haligus Rd, Lowr LevelHuntley, IL 60142 (224) 654‑0800
- 1800 McDonough Rd, Suite 100Hoffman Estates, IL 60192 (847) 742‑7272
- 2425 W 22nd St, Suite 101Oak Brook, IL 60523 (630) 990‑2212
- 300 Riverside Dr, Suite 100Bourbonnais, IL 60914 (800) 475‑6236
- 515 22nd AveMonroe, WI 53566 (608) 324‑2000
Group practices
Medicare enrollment lists Ronald J. Oconer as a member of these groups (CMS data updated 2026-10-02).
- Northwestern Medical Faculty Foundation4,503 clinicians in the group
- Orthomidwest, PLLC547 clinicians in the group
- The Monroe Clinic, Inc.199 clinicians in the group
- Town Square Anesthesia LLC21 clinicians in the group
- Novus Illinois Service Corporation20 clinicians in the group
- Oak Brook Anesthesiologists Ltd15 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Huntley
Clinicians with the same Medicare primary specialty in Huntley, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649473729 |
| 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