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Dr. Marshall S. Horwitz, MD

Internal Medicine

  • (206) 598-4317

Dr. Horwitz's Overview

Dr. Marshall S. Horwitz graduated from the University of Washington SOM in 1990. He works in Seattle, WA and specializes in Internal Medicine and Medical Genetics. Dr. Horwitz is affiliated with Seattle Childrens Hospital and University Of Washington Medical Center.

Gender: Male

Languages Spoken: English

Dr. Horwitz's Experience

Years in Practice: 25

Conditions Treated by Dr. Horwitz

  • Not Available

Procedures Performed by Dr. Horwitz

  • Not Available

Dr. Horwitz's Specialties

Internal Medicine, Medical Genetics

Dr. Horwitz's Education & Training

Medical School: University of Washington SOM; Graduated 1990

Dr. Horwitz's Accepted Insurance

  • Aetna Choice POS II
  • Aetna Managed Choice POS Open Access
  • Aetna Signature Administrators PPO
  • BCBS Blue Card PPO
  • CIGNA Open Access
  • First Choice
  • Great West PPO
  • Group Health Coop Core HIX
  • View More

Dr. Horwitz's Office Information & Appointments

Office Locations

Emergency Services Northwest
Center On Human Development & Disability

1959 NE Pacific St
Seattle, WA 98195
(206) 598-4317


Office Hours and Information

Fax: (206) 598-7815

Practice Website:

Accepting New Patients: Yes

Medicare Accepted: Yes

Medicaid Accepted: Yes

Monday 8:00 AM - 5:00 PM
Tuesday 8:00 AM - 5:00 PM
Wednesday 8:00 AM - 5:00 PM
Thursday 8:00 AM - 5:00 PM
Friday 8:00 AM - 5:00 PM
Saturday Closed
Sunday Closed

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