Quick answers
- Where does Dennis E. Dettmann see patients?
- Medicare's clinician data lists 1 practice location in Berwyn, IL. Call before your visit to confirm the address.
- What is Dennis E. Dettmann's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Dennis E. Dettmann accept Medicare assignment?
- Yes. Medicare's clinician data says Dennis E. Dettmann 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 Dennis E. Dettmann?
- (708) 749-2020, as listed in official Medicare / NPI Registry data.
- What is Dennis E. Dettmann's NPI number?
- 1609877455. 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 Dennis E. Dettmann is enrolled with Medicare (CMS data updated 2026-10-02).
- 6233 Cermak RdBerwyn, IL 60402 (708) 749‑2020
Group practices
Medicare enrollment lists Dennis E. Dettmann as a member of this group (CMS data updated 2026-10-02).
- Rosin Optical Co Inc51 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Berwyn
Clinicians with the same Medicare primary specialty in Berwyn, IL — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Illinois College Of Optometry At Chicago |
| Graduation year | 1978 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609877455 |
| 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