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Active NPI 1952341869 Individual Practitioner Male Practitioner

Dr. Mark David Sullivan , MD

Internal Medicine • Seattle, WA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Mark Sullivan, MD is a certified Internal Medicine practicing in Seattle, WA. With approximately 23 years of clinical experience since graduating from University Of Washington School Of Medicine in 2003, Dr. Sullivan delivers high-quality medical care to the local community at 325 9TH AVE.

Dr. Sullivan is affiliated with Swedish Health Services and accepts Medicare assignment.

Frequently performed procedures and clinical services include critical care, first, subsequent hospital care with moderate levelof medical decision making, if using time, at least, emergent insertion of breathing tube into windpipe cartilage using an endoscope. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

325 9th Ave

Seattle, WA 981042420

Telephone 2067313074
Associated Practice Facility / Clinic
🏢 Harborview Medical Center Facility NPI 1053359729

Medicare Profile & Education

Medical School

University Of Washington School Of Medicine

Graduation Year

2003

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Seattle, WA

Senior Veteran Specialist (>20 Yrs)
Practitioner Clinical Experience
23 Yrs +2.7 yrs vs City Avg
City Avg: 20.3 Yrs
State Avg: 23.4 Yrs
Regional Practice Density
839 Specialists

Practicing in Seattle, WA (3169 Statewide)

Telehealth Adoption Rate
26.1% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
64.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Sullivan (23 Years) 23 Yrs
Seattle Specialty Average (20.3 Years) 20.3 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
99291 Critical care, first 30-74 minutes
63 36 $671.00 $222.14
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
42 11 $291.00 $124.28

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License WA MD00046141

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Emergency Medicine

NUCC Taxonomy Code: 207P00000X

State License WA MD00046141

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
8454142 (WA)

Hospital & Practice Group Affiliations

Swedish Health Services

747 Broadway, Seattle, WA 981224379

Phone: 2063866000

Swedish Health Services

500 17th Ave, Seattle, WA 981225711

Phone: 2063202000

Swedish Health Services

751 Ne Blakely Dr, Issaquah, WA 980296201

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

3 Associated Practitioners
Dr. Claudine Kubesh , MD

Internal Medicine

NPI 1336153667

Doctor of Medicine (M.D.)

Dr. Steven Mitchell , MD

Emergency Medicine

NPI 1760422604

Doctor of Medicine (M.D.)

Dr. Jamie Shandro , MD MPH

Emergency Medicine

NPI 1992742530

MDMPH

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events
NPI Profile Active July 09, 2007

NPI status registered as active in NPPES database

📍
Updated Practice Location July 09, 2007

Registered at 325 9TH AVE, SEATTLE, WA 981042420 (Tel: 2067313074)

📍
Updated Business Mailing Address July 09, 2007

Registered at PO BOX 50095, SEATTLE, WA 981455095 (Tel: 2065436420)

👤
Provider Name / Credentials Updated July 09, 2007

Recorded as MARK SULLIVAN, M.D.

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 09, 2007

Emergency Medicine (License #MD00046141 in WA)

🟢
Initial NPI Registration & Enumeration June 08, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1952341869
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 08, 2006
Last Update: September 11, 2025
Sole Proprietor: No

Mailing Address

Po Box 50095

Seattle, WA 981455095

Phone: 2065436420

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.