Quick answers
- Where does Mark Yost see patients?
- Medicare's clinician data lists 1 practice location in King City, OR. Call before your visit to confirm the address.
- What is Mark Yost's specialty?
- Medicare lists Optometry as the primary specialty.
- Does Mark Yost accept Medicare assignment?
- Medicare's clinician data says Mark Yost may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Mark Yost?
- (971) 371-3927, as listed in official Medicare / NPI Registry data.
- What is Mark Yost's NPI number?
- 1821713645. 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 Yost is enrolled with Medicare (CMS data updated 2026-10-02).
- 15405 SW 116th Ave, Suite 204King City, OR 97224 (971) 371‑3927
Group practices
Medicare enrollment lists Mark Yost as a member of this group (CMS data updated 2026-10-02).
- Gatti Vision LLC3 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in Oregon
Clinicians with the same Medicare primary specialty in Oregon — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Medical school | Pacific University - College Of Optometry |
| Graduation year | 2022 |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1821713645 |
| 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