Quick answers
- Where does Mark J. Cha see patients?
- Medicare's clinician data lists 2 practice locations, including Blue Island, IL and Willowbrook, IL. Call before your visit to confirm the address.
- What is Mark J. Cha's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Mark J. Cha accept Medicare assignment?
- Yes. Medicare's clinician data says Mark J. Cha 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 Mark J. Cha?
- (708) 631-2781, as listed in official Medicare / NPI Registry data.
- What is Mark J. Cha's NPI number?
- 1649864828. 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 Mark J. Cha is enrolled with Medicare (CMS data updated 2026-10-02).
- 12200 Western AveBlue Island, IL 60406 (708) 631‑2781
- 40 75th StWillowbrook, IL 60527 (630) 581‑5372
Group practices
Medicare enrollment lists Mark J. Cha as a member of this group (CMS data updated 2026-10-02).
- Midwest Express Care 2, Inc222 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Blue Island
Clinicians with the same Medicare primary specialty in Blue Island, IL — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649864828 |
| 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