Quick answers
- Which hospitals does John C. Greenert work at?
- Medicare's official clinician data lists John C. Greenert at 2 hospitals: Olympic Medical Center and Virginia Mason Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John C. Greenert see patients?
- Medicare's clinician data lists 1 practice location in Seattle, WA. Call before your visit to confirm the address.
- What is John C. Greenert's specialty?
- Medicare lists Neurology as the primary specialty.
- Does John C. Greenert accept Medicare assignment?
- Yes. Medicare's clinician data says John C. Greenert 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 John C. Greenert?
- (206) 223-6600, as listed in official Medicare / NPI Registry data.
- What is John C. Greenert's NPI number?
- 1043625551. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John C. Greenert works
Medicare's Facility Affiliation Data lists John C. Greenert at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Olympic Medical CenterPort Angeles, WA · Acute Care Hospital · CCN 500072
- Virginia Mason Medical CenterSeattle, WA · Acute Care Hospital · CCN 500005
Practice locations
Addresses where John C. Greenert is enrolled with Medicare (CMS data updated 2026-10-02).
- 1100 9th AveSeattle, WA 98101 (206) 223‑6600
Group practices
Medicare enrollment lists John C. Greenert as a member of this group (CMS data updated 2026-10-02).
- Virginia Mason Medical Center867 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Oklahoma College Of Medicine |
| Graduation year | 2014 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043625551 |
| 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