Accepting new patients

Dr. Shannon O'Mahar, MD

Medical Oncology •  Female • Age 41

  2 Reviews
Dr. O'Mahar

Dean Clinic HEM and ONL

1200 John Q Hammons Dr Ste 400 Madison, WI 53717
Accepting new patients

Make an Appointment

(608) 410-2700

Dr. Shannon O'Mahar, MD is a medical oncology specialist in Madison, WI and has been practicing for 7 years. She graduated from Washington Univ Sch Of Med in 2005 and specializes in medical oncology, hematology, and more.

At a Glance

  • Hospital satisfaction Patients said they were highly satisfied at this doctor's hospital. See hospitals
  • Practices at top hospital America's 250 Best Hospitals Award™ See hospitals
  • Good nurse communication Patients said they had good communication with nurses. See hospitals

Insurance Check

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Dr. O'Mahar accepts

Accepted insurance can change. Please double-check when making an appointment.

(608) 410-2700

Dr. O'Mahar accepts the following insurance:

Aetna
Choice Plus POS II
AvMed
Open Access
Cigna
Cigna HMO
Cigna PPO
Great West Healthcare-Cigna PPO
Dean Health Plan, Inc.
MultiPlan
MultiPlan PPO
UnitedHealthCare
Choice Plus POS
Navigate HMO
Navigate POS
Options PPO

Background Check

Healthgrades does not collect malpractice claims information for Wisconsin
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
Learn more about background checks

Experience Check

Check Dr. O'Mahar's experience treating your condition or procedure

Dr. O'Mahar's Top Procedures and Conditions

Treatment Frequency
Blood Disorders
very high
very high

Treatment Frequency

Dr. O'Mahar treats Blood Disorders more than 95% of her peers

Dr. O'Mahar treats this condition more than 95% of her peers

Myelodysplastic Syndromes
very high
very high

Treatment Frequency

Dr. O'Mahar treats Myelodysplastic Syndromes more than 93% of her peers

Dr. O'Mahar treats this condition more than 93% of her peers

Rating Includes other areas of care:

  • Myelodysplastic Syndrome Associated With Isolated Del(5q) Chromosome Abnormality
Bone Cancer
very high
very high

Treatment Frequency

Dr. O'Mahar treats Bone Cancer more than 91% of her peers

Dr. O'Mahar treats this condition more than 91% of her peers

Rating Includes other areas of care:

  • Hip Cancer
  • Pelvic Cancer

Dr. O'Mahar's conditions and procedures:

  • Acute Leukemia
  • Acute Lymphocytic Leukemia
  • Acute Myeloid Leukemia
  • All Lymphoma
  • Anal and Rectal Cancer
  • Anemia
  • Bladder Cancer
  • Bleeding Disorders
  • Blood Disorders
  • Bone Cancer
  • Bone Disorders
  • Bone Marrow Biopsy
  • Brain and Nervous System Cancer (incl. Gliomas, Astrocytoma, Schwannoma, Medulloblastoma, Chordoma)
  • Brain Cancer
  • Breast Cancer
  • Cancer
  • Carcinoma in Situ
  • Central Nervous System Lymphoma
  • Cervical Cancer
  • Chronic Lymphocytic Leukemia
  • Chronic Myeloid Leukemia (CML)
  • Colorectal Cancer
  • Cryoglobulinemia
  • Deep Vein Thrombosis (DVT)
  • Esophageal Cancer
  • Eye Cancer
  • Gallbladder and Biliary Tract Cancer
  • Gynecologic Cancer
  • Head and Neck Cancer
  • Hodgkin's Disease
  • Immune Thrombocytopenic Purpura (ITP)
  • Kidney Cancer
  • Laryngeal Cancer
  • Larynx Conditions
  • 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
  • Primary Central Nervous System Lymphoma
  • 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

Dr. O'Mahar's Reviews

Likelihood to recommend Dr. O'Mahar

5.0

Based on 2 reviews

5 Stars
100%
(2)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
0%
(0)

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Average Reported Wait Time
  • Under 10 minutes
Dr. O'Mahar's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness

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About Me

Biography

Dr. Shannon O'Mahar, MD is a medical oncology specialist in Madison, WI and has been practicing for 7 years. She graduated from Washington Univ Sch Of Med in 2005 and specializes in medical oncology, hematology, and more.

Specialties

  • Medical Oncology
  • Hematology
  • Internal Medicine

Board Certifications

  • Hematology
  • Internal Medicine
  • Medical Oncology

Education

Barnes-Jewish Hospital
Internship Hospital
2012
University Of Wisconsin Hospital and Clinics
Fellowship Hospital
2008
Barnes-Jewish Hospital
Residency Hospital
2005
Washington Univ Sch Of Med
Medical School
2000
Stanford U
Undergraduate School

Awards

Affiliated Hospitals

Check the quality of care at hospitals where Dr. O'Mahar treats patients.

Learn more

82% Patient experience rating, 13% higher than the national average

  • Outstanding Patient Experience Award™ (2019, 2018)

76% Patient experience rating, 7% higher than the national average

  • America's 250 Best Hospitals Award™ (2019, 2018, 2017)
  • Outstanding Patient Experience Award™ (2019, 2018, 2017)
  • Patient Safety Excellence Award™ (2018, 2017)