Quick answers
- Which hospitals does Michael S. Lesser work at?
- Medicare's official clinician data lists Michael S. Lesser at 4 hospitals: Advocate Good Shepherd Hospital, Northwestern Lake Forest Hospital, 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 Michael S. Lesser see patients?
- Medicare's clinician data lists 1 practice location in Crystal Lake, IL. Call before your visit to confirm the address.
- What is Michael S. Lesser's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Michael S. Lesser accept Medicare assignment?
- Yes. Medicare's clinician data says Michael S. Lesser 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 Michael S. Lesser?
- (815) 459-6655, as listed in official Medicare / NPI Registry data.
- What is Michael S. Lesser's NPI number?
- 1760593032. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Michael S. Lesser works
Medicare's Facility Affiliation Data lists Michael S. Lesser at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Good Shepherd HospitalBarrington, IL · Acute Care Hospital · CCN 140291
- Northwestern Lake Forest HospitalLake Forest, IL · Acute Care Hospital · CCN 140130
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
Practice locations
Addresses where Michael S. Lesser is enrolled with Medicare (CMS data updated 2026-10-02).
- 1095 Pingree Rd, Suite 108Crystal Lake, IL 60014 (815) 459‑6655
Group practices
Medicare enrollment lists Michael S. Lesser as a member of this group (CMS data updated 2026-10-02).
- Family Medicine for McHenry County3 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Crystal Lake
Clinicians with the same Medicare primary specialty in Crystal Lake, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1760593032 |
| 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