See All Oncologists in Madison, WI
Dr. Shannon O'Mahar, MD Icon-share Share Profile
icon-circle-check
Link Copied!
Profile link copied to clipboard!
Super Profile

Dr. Shannon O'Mahar, MD

Medical Oncology*
4.0 (4)
Map Pin Small Madison, WI
Accepting new patients
19 years of experience

Offers telehealth

Overview of Dr. Shannon O'Mahar, MD

Dr. Shannon O'Mahar, MD is a Medical Oncology Specialist in Madison, WI. They specialize in Medical Oncology, has 19 years of experience, and is board certified in Hematology. They graduated from Washington University School of Medicine and is affiliated with Prairie Ridge Health, Stoughton Hospital, Ssm Health Saint Mary's Hospital Madison, Ssm Health Saint Clare Hospital Baraboo, Ssm Health Saint Mary's Hospital Janesville and Upland Hills Health. Dr. O'Mahar, completed a residency at Barnes-Jewish Hospital. Patients rated Dr. O'Mahar an average 4.0 star rating.

Dr. O'Mahar works at Practice in Madison, WI with other offices in Janesville, WI. They frequently treat conditions like Myelodysplastic Syndromes, Retroperitoneum Cancer and Osteosarcoma along with other conditions at varying frequencies. They are accepting new patients and accept Aetna, Anthem and Anthem Blue Cross Blue Shield as well as other major insurance plans. Please call ahead to schedule an appointment and to confirm all accepted insurance plans.

FindCare Super Profile Designation
Super Profile
5/5
Customize your search with filters that provide more Super Profile results near you
User Ratings (of at least 4.0)
Insurance Accepted
Headshot Available
Accepting New Patients
Conditions Treated and Procedures Performed

Dr. O'Mahar's Office Locations

  1. 1
    Ssm Health Cancer Care
    1200 John Q Hammons Dr Ste 400, Madison, WI 53717 Icon Directions Right Arrow Directions Phone Icon (608) 410-2700
  2. 2
    Ssm Health Dean Medical Group - Janesville
    3200 E Racine St, Janesville, WI 53546 Icon Directions Right Arrow Directions Phone Icon (608) 371-8000
  3. 3
    Ssm Health St. Mary's Hospital - Madison
    700 S Park St, Madison, WI 53715 Icon Directions Right Arrow Directions Phone Icon (608) 258-6670
  4. 4
    Ssm Health Pharmacy
    1211 Fish Hatchery Rd, Madison, WI 53715 Icon Directions Right Arrow Directions Phone Icon (608) 252-8000

Hospital Affiliations
Admitting Hospitals

Admitting hospitals are where the provider is credentialed to see patients, perform procedures, and send patients for continuous care.

  • Prairie Ridge Health
  • Stoughton Hospital
  • Ssm Health Saint Mary's Hospital Madison
  • Ssm Health Saint Clare Hospital Baraboo
  • Ssm Health Saint Mary's Hospital Janesville
  • Upland Hills Health

Experience & Treatment Frequency

NEW FEATURE

What is treatment frequency?

Our treatment frequency feature helps you understand howoften a provider performs or treats a specificprocedure/condition compared to other doctors. Providersrank in one of four frequency categories:

Very HighFrequency
HighFrequency
NormalFrequency
May Perform

Specific procedures/conditions that don’t haveenough data are indicated with “May Perform”. We encourageyou to contact the provider with questions about theirexperience.

Search for conditions or procedures.
Myelodysplastic Syndromes
Retroperitoneum Cancer
Osteosarcoma

Treatment frequency



Many providers have expertise treating multiple conditions or procedures. FindCare uses a variety of data sources to determine which conditions or procedures a provider treats and their level of experience.
Myelodysplastic Syndromes
Retroperitoneum Cancer
Osteosarcoma
Macroglobulinemia (incl. Waldenstrom's )
Myeloma
  • View other providers who treat Myeloma
Myeloproliferative Disorders
Anemia
  • View other providers who treat Anemia
Bleeding Disorders
Chronic Lymphocytic Leukemia
Acute Leukemia
Acute Myeloid Leukemia
Amyloidosis
Bladder Cancer
Bone Cancer
Breast Cancer
Cholangiocarcinoma
Chronic Myelomonocytic Leukemia
Coagulation Disorders
Colorectal Cancer
Deep Vein Thrombosis (DVT)
Endocrine Gland Cancer
Fever
  • View other providers who treat Fever
Hemochromatosis
Hodgkin's Disease
Joint Pain
Leukocytosis
Limb Pain
Liver Cancer
Lung Cancer
Marginal Zone Lymphoma
Metastatic Respiratory System Cancer
Neuroendocrine Tumors
Neutropenia
Non-Hodgkin's Lymphoma
Ovarian Cancer
Pancreatic Cancer
Pancytopenia
Polycythemia Rubra Vera
Prostate Cancer
Shortness of Breath
Small Intestine Cancer
Thrombocytosis
Thyroid Cancer
Tobacco Use Disorder
Urinary Tract Cancer
Urinary Tract Infection (UTI)
Uterine Cancer
Venous Embolism and Thrombosis
Vitamin B Deficiency
Arterial Blood Gas Test (ABG)
Electrocardiogram (EKG)
Immunization Administration
Abdominal Pain
Abnormal Thyroid
Acquired Hemolytic Anemia
Acute Deep Vein Thrombosis (DVT)
Acute Sinusitis
Acute Tonsillitis
Acute Upper Respiratory Infection
Acute Venous Embolism Thrombosis
Administrative Physical
All Headaches (incl. Migraine)
All Lymphoma
Anal and Rectal Cancer
Antiphospholipid Syndrome (APS)
Anxiety
  • View other providers who treat Anxiety
Arthritis
Arthritis of the Elbow
Asphyxia and Hypoxemia
Asthma
  • View other providers who treat Asthma
Astrocytoma
Asymptomatic Post-Menopausal Status
Atherosclerosis
Back Pain
Basal Cell Carcinoma
Bladder Infection
Blood Disorders
Blood in Urine (Hematuria)
Bone Disorders
Brain and Nervous System Cancer (incl. Gliomas, Astrocytoma, Schwannoma, Medulloblastoma, Chordoma)
Brain Cancer
Breast Carcinoma
Bronchitis
Calcium Metabolism Disorders
Cancer
  • View other providers who treat Cancer
Candidiasis of Skin and Nails
Carcinoma in Situ
Central Nervous System Lymphoma
Cervical Cancer
Chest Pain
Chronic Fatigue Syndrome
Chronic Myeloid Leukemia (CML)
Chronic Pain
Chronic Sinusitis
Constipation
COPD (Chronic Obstructive Pulmonary Disease)
Cough
  • View other providers who treat Cough
Cryoglobulinemia
Dehydration
Diabetes Type 2
Diabetes With Renal Manifestations
Diabetic Polyneuropathy
Diarrhea
  • View other providers who treat Diarrhea
Diffuse Large B-Cell Lymphoma
Dyslipidemia
Dysphagia
Eczema and Contact Dermatitis
Emphysema
Enlarged Prostate (BPH)
ENT Cancer
Enteritis
Esophageal Cancer
Fallopian Tube Cancer
Familial Hypercholesterolemia
Fibromyalgia
Folate Deficiency Anemia
Follicular Lymphoma Grade 1
Follicular Lymphoma Grade 2
Follicular Lymphoma Grade 3
Follicular Lymphoma Grade 3A
Foot Infection
Gas-Bloat Syndrome
Gastritis
Gastroesophageal Reflux Disease (GERD)
Genital Herpes
Gout
  • View other providers who treat Gout
Gynecologic Cancer
Hair Loss
Head and Neck Cancer
Headache
  • View other providers who treat Headache
Heart Disease
Hemophilia
Hereditary Amyloidosis
Hereditary Spherocytosis
Hernia
  • View other providers who treat Hernia
Herpes Simplex Infection
Herpes Zoster Without Complication
Hypercalcemia
Hypercoagulable State
Hyperkalemia
Hyperlipidemia
Hypertension
Hypogammaglobulinemia
Hypoglycemia
Hypokalemia
Hypotension
Hypotension (Excluding Maternal)
Hypothyroidism
Immune Thrombocytopenia
Immune Thrombocytopenic Purpura (ITP)
Insomnia
  • View other providers who treat Insomnia
Intestinal Diverticulitis
Intestinal Diverticulosis
Iodine Deficiency
Iron Metabolism Disorders
Itchy Skin
Kidney Cancer
Leg and Foot Ulcers
Limb Swelling
Limb Swelling Caused by Fluid Overload
Lipid Disorders
Low Back Pain
Low Blood Oxygen Level
Lymphocytosis
Lymphoma
  • View other providers who treat Lymphoma
Lymphoma, Large-Cell
Magnesium Metabolism Disorders
Malaise and Fatigue
Male Breast Cancer
Male Breast Carcinoma
Malnutrition
Mantle Cell Lymphoma
Medulloblastoma
Melanoma
  • View other providers who treat Melanoma
Meningiomas
Menopausal and Postmenopausal Disorders
Mineral Metabolism Disorders
Muscle Spasm
Muscle Weakness
Nail and Nail Bed Infection
Nail Infection
Nausea
  • View other providers who treat Nausea
Nighttime Urination (Nocturia)
Nodular Lymphoma
Noninfectious Gastroenteritis and Colitis
Nosebleed
Obesity
  • View other providers who treat Obesity
Oral Cancer
Osteoarthritis
Osteoarthritis of Foot
Osteoarthritis of Hip
Osteoarthritis of Hip and Thigh
Osteoarthritis of Knee
Osteoarthritis of Shoulder
Osteoarthritis of Spine
Osteopenia
Osteoporosis
Overweight
Painful Urination (Dysuria)
Pericardial Disease
Peripheral T-Cell Lymphoma
Peritoneal Cancer
Pinched Nerve in Back
Pleura Cancer
Pleural Cancer
Pneumonia
Polymyalgia Rheumatica (PMR)
Polyneuropathy
Polyuria
  • View other providers who treat Polyuria
Potassium Deficiency
Primary Central Nervous System Lymphoma
Primary Hypercoagulable State
Proteinuria
Purpura
  • View other providers who treat Purpura
Radiculopathy
Rash
  • View other providers who treat Rash
Salivary Gland Cancer
Sarcoidosis
Schwannoma
Sciatica (Not Due to Disc Displacement)
Secondary Diabetes Mellitus
Secondary Malignancies
Sexually Transmitted Diseases (STDs)
Sinus Tachycardia
Sinusitis
Skin Cancer
Sleep Apnea
Soft Tissue Sarcoma
Squamous Cell Carcinoma of Skin
Stomach and Small Intestine Cancer
Testicular Cancer
Thalassemia
Throat Cancer (Hypopharyngeal)
Throat Cancer (Oropharyngeal)
Thrombosis
Thyroid Goiter
Tonsillitis
Transient Ischemic Attack (TIA)
Upper Digestive Tract Cancer
Urinary Incontinence
Urinary Stones
Uterine Diseases
Venous Insufficiency
Vitamin B12 Deficiency
Vitamin D Deficiency
Wheezing
  • View other providers who treat Wheezing
Anemia and Iron Deficiency Screening
Bone Marrow Biopsy
Diabetes Counseling
Erythropoietin Test
Fecal Occult Blood Test for Colorectal Cancer
Plasmapheresis
Check your insurance
    Close Icon
    Please double-check when making an appointment.

    View All Accepted Carriers

    • Aetna
    • Anthem
    • Anthem Blue Cross Blue Shield
    • AvMed
    • Blue Cross and Blue Shield of Illinois
    • Blue Cross Blue Shield
    • Buckeye Community Health Plan
    • CareFirst Blue Cross Blue Shield
    • Cigna
    • MultiPlan
    • UnitedHealthCare
    • Wellmark Blue Cross and Blue Shield

    * Please verify this information when scheduling an appointment.

    Ratings & Reviews
    Reviews are displayed in date order and collected from patients who have agreed to reporting accurate and fair reviews. Providers with no reviews may have a new FindCare profile, or no submitted reviews on FindCare yet.

    Learn more about how FindCare's ratings and reviews work

    4.0
    Average provider rating
    Based on 4 ratings
    Patient Ratings (4)
    5 Star
    (3)
    4 Star
    (0)
    3 Star
    (0)
    2 Star
    (0)
    1 Star
    (1)
    Leave a review

    How was your appointment with Dr. O'Mahar?

    Read more reviews on Healthgrades
    Photo: Dr. Shannon O'Mahar, MD
    How would you rate your experience with Dr. Shannon O'Mahar, MD?
    • Likelihood of recommending Dr. O'Mahar to family and friends

    Dr. O'Mahar's Office & Staff

    • Ease of scheduling urgent appointments
    • Office environment, cleanliness, comfort, etc.
    • Staff friendliness and courteousness
    • Total wait time (waiting & exam rooms)

    Experience with Dr. O'Mahar

    • Level of trust in provider's decisions
    • How well provider explains medical condition(s)
    • How well provider listens and answers questions
    • Hpends appropriate amount of time with patients

    Tell Us About Yourself

    • Your gender:
    • Your age group:
    • Number of office visits you've had in the last 2 years:

    Finish Here

    • How would you like to confirm your survey information?
      Standard text messaging and data rates may apply.
    Thank you for sharing your feedback about Dr. Shannon O'Mahar, MD.

    About Dr. Shannon O'Mahar, MD

    Specialties*
    • Medical Oncology

    • *Healthline does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
    Specialties*
    Years of Experience
    • 19 years of experience
    Years of Experience
    Years of experience represents how long a provider has been practicing in their field since graduating from medical school. Not all providers will have this information available.

    Languages Spoken
    • English
    Languages Spoken
    NPI Number
    • 1366569899
    NPI Number
    A National Provider Identifier (NPI) is a unique 10-digit identifier issued by the government to healthcare providers.

    Education & Certifications

    Fellowship
    • University of Wisconsin Hospital and Clinics
    Fellowship
    Residency
    • Barnes-Jewish Hospital
    Residency
    Internship
    • Barnes - Jewish Hospital
    Internship
    Medical Education
    • Washington University School of Medicine
    Medical Education
    Board Certifications
    • Hematology, Internal Medicine and Medical Oncology
    Board Certifications
    What’s a board certification and why is it important that my provider has one?

    A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

    Frequently Asked Questions

    Dr. Shannon O'Mahar, MD is accepting new patients on Healthline FindCare. You can check to see if Dr. O'Mahar is offering online scheduling or call the provider’s office for more information.

    Dr. O'Mahar has indicated that they do offer telehealth services. Please call the provider’s office at for more information.

    Dr. O'Mahar has seen patients for Myelodysplastic Syndromes, Retroperitoneum Cancer and Osteosarcoma, and more. You can see other conditions treated by Dr. O'Mahar on their profile. Please call the provider’s office to confirm all visit reasons.

    4 patients have reviewed Dr. O'Mahar. The overall rating for this provider is 4.0. You can read verified reviews and ratings and leave your own review based on your experience with Dr. O'Mahar.

    Whether a person prefers to schedule an appointment online or over the phone with Dr. O'Mahar, there are benefits to both methods. A person calling to schedule an with Dr. O'Mahar appointment can ask questions about the practice, provider availability, conditions treated, procedures performed, and if their insurance carrier is accepted. While online scheduling is quicker, easier, allows one to view a wide range of appointment times, and may provide the ability to sync with a personal calendar.

    Telehealth Options
    This provider has not specified a telehealth appointment method. Would you still like to make an appointment with Dr. O'Mahar, or would you like to choose another provider and have an online appointment right now?
    Find provider online now
    Call now to make an appointment
    (608) 410-2700

    Are you Dr. Shannon O'Mahar, MD?

    Claim your profile through Healthgrades to keep it updated and reach more patients.

    It’s free and only takes a minute.

    CLAIM MY PROFILE

    Search

    Primary Care
    Close Icon