Quick answers
- Where does Alex R. Tan see patients?
- Medicare's clinician data lists 2 practice locations, including Chicago, IL and Oak Park, IL. Call before your visit to confirm the address.
- What is Alex R. Tan's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Alex R. Tan accept Medicare assignment?
- Yes. Medicare's clinician data says Alex R. Tan 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 Alex R. Tan?
- (312) 949-7751, as listed in official Medicare / NPI Registry data.
- What is Alex R. Tan's NPI number?
- 1215921655. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Alex R. Tan is enrolled with Medicare (CMS data updated 2026-10-02).
- 3241 S Michigan AveChicago, IL 60616 (312) 949‑7751
- 603 Madison StOak Park, IL 60302 (708) 383‑2150
Group practices
Medicare enrollment lists Alex R. Tan as a member of this group (CMS data updated 2026-10-02).
- Illinois College of Optometry76 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Illinois College Of Optometry At Chicago |
| Graduation year | 1999 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1215921655 |
| 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
- 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