Photo of Sara J. Grethlein, MD, MBA, FACP

Sara J. Grethlein, MD, MBA, FACP

Accepting New Patients
Offers Video Visits
1221 Madison Street, Arnold Pavilion, Suite 200
Seattle, WA 98104
2298.0 miles away
Medical Groups & Affiliations
Speaks: English

Medical Oncology - Swedish Cancer Institute First Hill

1221 Madison Street, Arnold Pavilion, Suite 200, Seattle, WA 98104

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About Sara J. Grethlein

Dr. Grethlein feels strongly that patients should be in the driver’s seat for their cancer journey. She has had the privilege of serving as their expert guide — sharing her knowledge of the terrain, and alerting them to the hazards ahead. But it is the patient who ultimately sets the destination and chooses the path. Dr. Grethlein walks alongside her patients and their loved ones, and it is her responsibility to bring all the needed resources — often things that the patient may not even know will be helpful. To do this well, Dr. Grethlein needs to get to know each patient as an individual — and that is where she finds a lot of the joy in her work.

Medical School

University of New York, Brooklyn, NY


Washington University


Washington University

Professional Associations

Master’s in Business Administration from Kelley School of Business, Indiana University; Graduate of Executive Leadership in Academic Medicine (ELAM), 2020 Poets and Quants

Board Certifications
  • American Board of Internal Medicine, Medical Oncology
Medical Oncology - Swedish Cancer Institute First Hill
1221 Madison Street
Seattle, WA 98104

Arnold Pavillion: Office of Sara Jo Grethlein
1221 Madison Street, Suite 1110
Seattle, WA 98104

Medical Groups & Affiliations

Affiliated Locations
Swedish First Hill

Dr. Grethlein grew up in New York, and has Broadway in her blood. She loves musical theater. Although she is learning to be a Seahawks fan, she has been a Jets fan since Joe Namath was playing. Dr. Grethlein met her husband in engineering school — he continues to work as a consultant. They have two accomplished children who live in Philadelphia, and an Australian shephard named Toby. When she isn’t working or singing show tunes, Dr. Grethlein is riding her Peloton, doing long distance walks or knitting.

Clinical Interests

  • Adverse Effects To Anticoagulants
  • Anemia
  • Bleeding Disorder
  • Blood Cancer
  • Blood Disorders
  • Bone Marrow Disorders
  • Breast Cancer
  • Cancer
  • Cancer Chemotherapy
  • Cancer Pain
  • Cancer Related Fatigue
  • Cancer Risk Assessment
  • Cancer Survivor
  • Carcinoma Of Unknown Primary
  • Chemoradiation
  • Colorectal Cancer
  • Endocrine Complications Of Cancer Therapy
  • Endometrial Cancer
  • Giant Cell Tumor Of The Bone
  • Head And Neck Cancer
  • Hellp Syndrome
  • Hematologic Malignancies
  • Hemoglobinopathies
  • Idiopathic Thrombocytopenic Purpura
  • Iron Deficiency Anemia
  • Leukopenia
  • Lung Cancer
  • Lymphedema Therapy
  • Lymphoma
  • Lymphopenia
  • Melanoma
  • Metastatic Liver Cancer
  • Metastatic Prostate Cancer
  • Musculoskeletal Tumor
  • Myelodysplastic Syndrome
  • Myeloproliferative Diseases
  • Neutropenia
  • Non Hodgkin Lymphoma
  • Oral Complications Of Cancer
  • Osteosarcoma
  • Pancytopenia
  • Patient Education
  • Personalized Cancer Therapy
  • Petechiae
  • Polycythemia
  • Pulmonary Metastases
  • Retroperitoneal Mass
  • Sarcoma
  • Secondary Polycythemia
  • Side Effects Of Cancer Treatment
  • Splenomegaly
  • Stomach Cancer
  • Submucosal Tumors
  • Sweat Gland Carcinoma
  • Thalassemia
  • Thoracic Cancer
  • Thoracic Malignancy
  • Thrombocytopenia
  • Thrombophilia
  • Thymus Cancer
  • Thyroid Cancer
  • Tracheal Cancer
  • Virtual Care
  • Von Willebrand Disease
  • Waldenstrom Macroglobulinemia