Dr. Shannon O'Mahar, MD is a medical oncology specialist in Madison, WI and has been practicing for 6 years. She graduated from Washington Univ Sch Of Med in 2005 and specializes in medical oncology, hematology, and more.
Dean Clinic HEM and ONL
1200 John Q Hammons Dr Ste 400
Madison, WI 53717
(608) 410-2700
Insurance Accepted
- Aetna
- AvMed
- Cigna
- Dean Health Plan, Inc.
- MultiPlan
- UnitedHealthCare
*Please verify this information when scheduling an appointment.
Learn about Dr. O'Mahar
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Top Care Areas
See how frequently Dr. O'Mahar performs your care needs compared to other doctors.
Blood Disorders
very high
more than 99% of peers
Anemia
very high
more than 97% of peers
Myelodysplastic Syndromes
very high
more than 93% of peers
Dr. O'Mahar's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.
3 Specialties
- Medical Oncology
- Hematology
- Internal Medicine
3 Board Certifications
- HematologyAccredited by: American Board of Internal Medicine*
- Internal MedicineAccredited by: American Board of Internal Medicine*
- Medical OncologyAccredited by: American Board of Internal Medicine*
73 Conditions Treated
- Acute Leukemia
- Acute Myeloid Leukemia
- All Lymphoma
- Anal and Rectal Cancer
- Anemia
- Bladder Cancer
- Bleeding Disorders
- Blood Disorders
- Bone Cancer
- Bone Disorders
- Brain and Nervous System Cancer (incl. Gliomas, Astrocytoma, Schwannoma, Medulloblastoma, Chordoma)
- Brain Cancer
- Breast Cancer
- Cancer
- Carcinoma in Situ
- Cervical Cancer
- Chronic Myeloid Leukemia (CML)
- Colorectal Cancer
- Deep Vein Thrombosis (DVT)
- Esophageal Cancer
- Gallbladder and Biliary Tract Cancer
- Gynecologic Cancer
- Head and Neck Cancer
- Hodgkin's Disease
- Immune Thrombocytopenic Purpura (ITP)
- Kidney Cancer
- Leukocytosis
- Liver Cancer
- Lung Cancer
- Lymphocytosis
- Lymphoma
- Lymphoma, Large-Cell
- Lymphosarcoma
- Macroglobulinemia (incl. Waldenstrom's )
- Mantle Cell Lymphoma
- Marginal Zone Lymphoma
- Melanoma
- Merkel Cell Carcinoma
- Multiple Myeloma
- Myelodysplastic Syndromes
- Myeloproliferative Disorders
- Neuroendocrine Tumors
- Neutropenia
- Nodular Lymphoma
- Non-Hodgkin's Lymphoma
- Oral Cancer
- Osteosarcoma
- Ovarian Cancer
- Pancreatic Cancer
- Pancytopenia
- Pleura Cancer
- Pleural Cancer
- Polycythemia Rubra Vera
- Prostate Cancer
- Purpura
- Reticulosarcoma
- Retina Diseases
- Secondary Malignancies
- Skin Cancer
- Small Intestine Cancer
- Soft Tissue Sarcoma
- Squamous Cell Carcinoma
- Stomach and Small Intestine Cancer
- Stomach Cancer
- Testicular Cancer
- Throat Cancer (Hypopharyngeal)
- Throat Cancer (Oropharyngeal)
- Thrombocytosis
- Thrombosis
- Thyroid Cancer
- Uterine Cancer
- Uterine Diseases
- Venous Embolism and Thrombosis
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1 Procedures
Background Check
Malpractice Claims not available
Healthgrades does not collect malpractice information for Wisconsin.
0 Sanctions
No sanctions history found for the years that Healthgrades collects data.
0 Board Actions
No board actions found for the years that Healthgrades collects data.
Education
- Stanford UUndergraduate School | Graduated 2000
- Washington Univ Sch Of MedMedical School | Graduated 2005
- Barnes-Jewish HospitalInternship Hospital | Completed
- Barnes-Jewish HospitalResidency Hospital | Completed 2008
- University Of Wisconsin Hospital and ClinicsFellowship Hospital | Completed 2012
Awards & Recognition
Awards & Honors
- Healthgrades Honor Roll
Media & Publications
Dr. O'Mahar has no media or publications listed.
Languages Spoken
- English
Memberships & Professional Affiliations
Dr. O'Mahar does not have any memberships or affiliations listed. If you are Dr. O'Mahar and would like to add memberships or affiliations, please update your profile.
Dr. O'Mahar's Reviews
Likelihood of recommending Dr. O'Mahar to family and friends
1 review
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Now Accepting New Patients
Dr. O'Mahar accepts 6 insurance carriers
- AetnaChoice Plus POS II
- AvMedOpen Access
- CignaCigna HMOCigna PPOGreat West Healthcare-Cigna PPO
- Dean Health Plan, Inc.
- MultiPlanMultiPlan PPO
- UnitedHealthCareChoice Plus POSNavigate HMONavigate POSOptions PPO
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*Please verify this information when scheduling an appointment.