Quick answers
- Which hospitals does Michael D. De Guzman work at?
- Medicare's official clinician data lists Michael D. De Guzman at 1 hospital: Advocate Sherman Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Michael D. De Guzman see patients?
- Medicare's clinician data lists 2 practice locations, including West Dundee, IL and Crystal Lake, IL. Call before your visit to confirm the address.
- What is Michael D. De Guzman's specialty?
- Medicare lists Ophthalmology as the primary specialty.
- Does Michael D. De Guzman accept Medicare assignment?
- Medicare's clinician data says Michael D. De Guzman may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Michael D. De Guzman's NPI number?
- 1003278862. 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 D. De Guzman works
Medicare's Facility Affiliation Data lists Michael D. De Guzman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Sherman HospitalElgin, IL · Acute Care Hospital · CCN 140030
Practice locations
Addresses where Michael D. De Guzman is enrolled with Medicare (CMS data updated 2026-10-02).
- 650 Spring Hill Ring Rd, Suite 2020West Dundee, IL 60118
- 730 E Terra Cotta Ave, Suite B2Crystal Lake, IL 60014
Group practices
Medicare enrollment lists Michael D. De Guzman as a member of this group (CMS data updated 2026-10-02).
- Simpson Eye Physicians and Surgeons PLLC5 clinicians in the group
Specialties
- Ophthalmologyprimary
Other ophthalmologists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1003278862 |
| 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