Quick answers
- Where does Gregory Koenig see patients?
- Medicare's clinician data lists 3 practice locations, including Fernley, NV, Yerington, NV and Fallon, NV. Call before your visit to confirm the address.
- What is Gregory Koenig's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Gregory Koenig accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Koenig 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 Gregory Koenig?
- (775) 575-1966, as listed in official Medicare / NPI Registry data.
- What is Gregory Koenig's NPI number?
- 1255301388. 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 Gregory Koenig is enrolled with Medicare (CMS data updated 2026-10-02).
- 198 E Main StFernley, NV 89408 (775) 575‑1966
- 233 S Main StYerington, NV 89447 (775) 463‑2020
- 65 N Taylor StFallon, NV 89406 (775) 423‑8024
Group practices
Medicare enrollment lists Gregory Koenig as a member of this group (CMS data updated 2026-10-02).
- Robertson and Koenig Ltd5 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Fernley
Clinicians with the same Medicare primary specialty in Fernley, NV — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Pacific University - College Of Optometry |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255301388 |
| 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