Quick answers
- Which hospitals does Ronald M. Shenfeld work at?
- Medicare's official clinician data lists Ronald M. Shenfeld at 1 hospital: Mercyhealth Hospital & Physician Clinic-Crystal LA…. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ronald M. Shenfeld see patients?
- Medicare's clinician data lists 2 practice locations, including Harvard, IL and Crystal Lake, IL. Call before your visit to confirm the address.
- What is Ronald M. Shenfeld's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Ronald M. Shenfeld accept Medicare assignment?
- Yes. Medicare's clinician data says Ronald M. Shenfeld 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 M. Shenfeld?
- (815) 943-1122, as listed in official Medicare / NPI Registry data.
- What is Ronald M. Shenfeld's NPI number?
- 1568497311. 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 M. Shenfeld works
Medicare's Facility Affiliation Data lists Ronald M. Shenfeld at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercyhealth Hospital & Physician Clinic-Crystal LA…Crystal Lake, IL · Acute Care Hospital · CCN 140308
Practice locations
Addresses where Ronald M. Shenfeld is enrolled with Medicare (CMS data updated 2026-10-02).
- 348 S Division StHarvard, IL 60033 (815) 943‑1122
- 875 S Route 31Crystal Lake, IL 60014 (779) 220‑5500
Group practices
Medicare enrollment lists Ronald M. Shenfeld as a member of this group (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Southern Illinois University School Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568497311 |
| 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