Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Dr. Mark David Sullivan, MD

Individual provider Emergency Medicine Physician · NPI 1952341869

Dr. Mark David Sullivan, MD is registered under Critical Care (Intensivists) in Seattle, Washington. Graduated from University of Washington School of Medicine in 2003, 23 years ago. Practices with Swedish Health Services, a 1,045-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
23
Trained at
University of Washington School of Medicine
Licensed in
WA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

325 9th Ave
Seattle, WA 98104-2420
Phone: (206) 731-3074
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD00046141 (WA)
Emergency Medicine Physician Taxonomy 207P00000X · Licence MD00046141 (WA)

Record details

NPI number1952341869
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 8, 2006
Last updated in NPPESSeptember 11, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCRITICAL CARE (INTENSIVISTS)
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF WASHINGTON SCHOOL OF MEDICINE
Graduated 2003 (23 years in practice)
Group practice Swedish Health Services — 1045 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients45
Services billed 121 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Swedish Health Services

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1045 clinicians in the practice; 12 are shown here.

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