Quick answers
- Which hospitals does Benjamin S. Frank work at?
- Medicare's official clinician data lists Benjamin S. Frank at 5 hospitals: Mercy Harvard Hospital, Mercy Health System Corp, Mercyhealth Hospital & Physician Clinic-Crystal LA…, Northwestern Medicine Central Dupage Hospital and Northwestern Medicine McHenry. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Benjamin S. Frank see patients?
- Medicare's clinician data lists 1 practice location in Woodstock, IL. Call before your visit to confirm the address.
- What is Benjamin S. Frank's specialty?
- Medicare lists Rheumatology as the primary specialty.
- Does Benjamin S. Frank accept Medicare assignment?
- Yes. Medicare's clinician data says Benjamin S. Frank 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 Benjamin S. Frank?
- (815) 337-7100, as listed in official Medicare / NPI Registry data.
- What is Benjamin S. Frank's NPI number?
- 1871554097. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Benjamin S. Frank works
Medicare's Facility Affiliation Data lists Benjamin S. Frank at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Harvard HospitalHarvard, IL · Critical Access Hospital · CCN 141335
- Mercy Health System CorpJanesville, WI · Acute Care Hospital · CCN 520066
- Mercyhealth Hospital & Physician Clinic-Crystal LA…Crystal Lake, IL · Acute Care Hospital · CCN 140308
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
Practice locations
Addresses where Benjamin S. Frank is enrolled with Medicare (CMS data updated 2026-10-02).
- 2000 Lake AveWoodstock, IL 60098 (815) 337‑7100
Group practices
Medicare enrollment lists Benjamin S. Frank as a member of this group (CMS data updated 2026-10-02).
- Mercy Health System Corporation753 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Chicago, Pritzker School Of Medicine |
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1871554097 |
| 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