Quick answers
- Where does Max S. Greyson see patients?
- Medicare's clinician data lists 2 practice locations, including Oak Brook, IL and Oakbrook Terrace, IL. Call before your visit to confirm the address.
- What is Max S. Greyson's specialty?
- Medicare lists Clinical Social Worker as the primary specialty.
- Does Max S. Greyson accept Medicare assignment?
- Yes. Medicare's clinician data says Max S. Greyson 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 Max S. Greyson's NPI number?
- 1891618518. 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 Max S. Greyson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1211 W 22nd St, Suite 406Oak Brook, IL 60523
- 1211 W 22nd St, Suite 406Oakbrook Terrace, IL 60523
Specialties
- Clinical Social Workerprimary
Other clinical social workers in Oak Brook
Clinicians with the same Medicare primary specialty in Oak Brook, IL — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 2023 |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891618518 |
| 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