Quick answers
- Which hospitals does Mark D. Sullivan work at?
- Medicare's official clinician data lists Mark D. Sullivan at 3 hospitals: Swedish Issaquah, Swedish Medical Center and Swedish Medical Center / Cherry Hill. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark D. Sullivan see patients?
- Medicare's clinician data lists 3 practice locations, including Seattle, WA and Issaquah, WA. Call before your visit to confirm the address.
- What is Mark D. Sullivan's specialty?
- Medicare lists Critical Care (Intensivists) as the primary specialty, and also Internal Medicine.
- Does Mark D. Sullivan accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Sullivan 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 Mark D. Sullivan?
- (206) 320-2000, as listed in official Medicare / NPI Registry data.
- What is Mark D. Sullivan's NPI number?
- 1952341869. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark D. Sullivan works
Medicare's Facility Affiliation Data lists Mark D. Sullivan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Swedish IssaquahIssaquah, WA · Acute Care Hospital · CCN 500152
- Swedish Medical CenterSeattle, WA · Acute Care Hospital · CCN 500027
- Swedish Medical Center / Cherry HillSeattle, WA · Acute Care Hospital · CCN 500025
Practice locations
Addresses where Mark D. Sullivan is enrolled with Medicare (CMS data updated 2026-10-02).
- 500 17th AveSeattle, WA 98122 (206) 320‑2000
- 747 BroadwaySeattle, WA 98122 (206) 386‑6000
- 751 NE Blakely DrIssaquah, WA 98029
Group practices
Medicare enrollment lists Mark D. Sullivan as a member of this group (CMS data updated 2026-10-02).
- Swedish Health Services1,037 clinicians in the group
Specialties
Find other Critical Care (Intensivists) doctors in Washington →
Other critical care doctors in Seattle
Clinicians with the same Medicare primary specialty in Seattle, WA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 2003 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1952341869 |
| 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