Quick answers
- Where does Fredrick S. An see patients?
- Medicare's clinician data lists 1 practice location in Olympia, WA. Call before your visit to confirm the address.
- What is Fredrick S. An's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Fredrick S. An accept Medicare assignment?
- Yes. Medicare's clinician data says Fredrick S. An 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 Fredrick S. An?
- (360) 497-9480, as listed in official Medicare / NPI Registry data.
- What is Fredrick S. An's NPI number?
- 1194991901. 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 Fredrick S. An is enrolled with Medicare (CMS data updated 2026-10-02).
- 413 Lilly Rd NEOlympia, WA 98506 (360) 497‑9480
Group practices
Medicare enrollment lists Fredrick S. An as a member of this group (CMS data updated 2026-10-02).
- Kaiser Foundation Health Plan of Washington1,526 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Olympia
Clinicians with the same Medicare primary specialty in Olympia, WA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | College Of Osteo Med Of The Pacific At Pomona |
| Graduation year | 2008 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1194991901 |
| 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