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

Dr. Mark Constantine Zaros, MD

Individual provider Internal Medicine Physician · NPI 1639393093

Dr. Mark Constantine Zaros, MD is a Hospitalist in Seattle, Washington. Graduated from University of Miami, Lm Miller School of Medicine in 2004, 22 years ago. Practices with Emory Medical Care Foundation Inc, a 996-clinician group and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
22
Trained at
University of Miami, Lm Miller School of Medicine
Licensed in
WA
In the registry since
2007
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 Not confirmed with CMS for 10 years — call before visiting
Phone: (206) 744-3000
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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 MD60037585 (WA)

Record details

NPI number1639393093
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedApril 13, 2007
Last updated in NPPESOctober 25, 2016

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF MIAMI, LM MILLER SCHOOL OF MEDICINE
Graduated 2004 (22 years in practice)
Group practice Emory Medical Care Foundation Inc — 996 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients89
Services billed 309 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

Colleagues at Emory Medical Care Foundation Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 996 clinicians in the practice; 12 are shown here.

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