Quick answers
- Which hospitals does Gretchen K. Johnson work at?
- Medicare's official clinician data lists Gretchen K. Johnson at 2 hospitals: Highline Medical Center and University of Washington Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gretchen K. Johnson see patients?
- Medicare's clinician data lists 2 practice locations, including Seattle, WA and Burien, WA. Call before your visit to confirm the address.
- What is Gretchen K. Johnson's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Gretchen K. Johnson accept Medicare assignment?
- Yes. Medicare's clinician data says Gretchen K. Johnson 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 Gretchen K. Johnson?
- (206) 364-0500, as listed in official Medicare / NPI Registry data.
- What is Gretchen K. Johnson's NPI number?
- 1407936362. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gretchen K. Johnson works
Medicare's Facility Affiliation Data lists Gretchen K. Johnson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Highline Medical CenterBurien, WA · Acute Care Hospital · CCN 500011
- University of Washington Medical CenterSeattle, WA · Acute Care Hospital · CCN 500008
Practice locations
Addresses where Gretchen K. Johnson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1550 N 115th StSeattle, WA 98133 (206) 364‑0500
- 16251 Sylvester Rd SWBurien, WA 98166 (206) 431‑5314
Group practices
Medicare enrollment lists Gretchen K. Johnson as a member of these groups (CMS data updated 2026-10-02).
- The Association of University Physicians3,535 clinicians in the group
- Highline Emergency Physicians PLLC20 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2004 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1407936362 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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