Quick answers
- Where does Carl E. Harder see patients?
- Medicare's clinician data lists 6 practice locations, including Louisville, KY, Elizabethtown, KY and Ashland, KY. Call before your visit to confirm the address.
- What is Carl E. Harder's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Carl E. Harder accept Medicare assignment?
- Yes. Medicare's clinician data says Carl E. Harder 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 Carl E. Harder?
- (502) 893-2015, as listed in official Medicare / NPI Registry data.
- What is Carl E. Harder's NPI number?
- 1558635748. 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 Carl E. Harder is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 1001 Breckenridge LnLouisville, KY 40207 (502) 893‑2015
- 1609 N Dixie Ave, Suite 100Elizabethtown, KY 42701 (270) 765‑7372
- 4655 Outer LoopLouisville, KY 40219 (502) 966‑2020
- 500 Winchester Ave, Suite 810Ashland, KY 41101 (606) 324‑3672
- 5220 Frederica StOwensboro, KY 42301 (270) 684‑1174
Group practices
Medicare enrollment lists Carl E. Harder as a member of this group (CMS data updated 2026-10-02).
- KY Doctors of Optometry, PLLC67 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Louisville
Clinicians with the same Medicare primary specialty in Louisville, KY — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558635748 |
| 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