Dr. Shannon O'Mahar, MD

Medical OncologyFemaleAge 43

Dr. O'Mahar
Accepting new patients
Telehealth services available

Dean Clinic Oncology Janesville

3200 E Racine St Janesville, WI 53546

Make an Appointment

(608) 371-8000

Dr. Shannon O'Mahar, MD is a Medical Oncology Specialist in Janesville, WI and has over 16 years of experience in the medical field. She graduated from Washington Univ Sch of Med medical school in 2005. She is affiliated with medical facilities such as Edgerton Hospital And Health Services and Ssm Health Saint Mary's Hospital Janesville. She is accepting new patients and has indicated that she accepts telehealth appointments. Be sure to call ahead with Dr. O'Mahar to book an appointment.

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Hospital Highlight

Dr. O'Mahar is affiliated with Ssm Health Saint Mary's Hospital Janesville Janesville, a highly rated hospital.

At a Glance

  • Explains Conditions Well
    Patients said this doctor explains conditions well. See reviews
  • Offers Telehealth
    This provider offers telehealth appointments. Call the office to schedule an appointment.
  • Practices at Top Hospital
    Outstanding Patient Experience Award™ See hospitals

Experience and Background Checks

Experience
Background

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
Myeloma
very high
very high

Treatment Frequency

Dr. O'Mahar treats Myeloma more than 97% of her peers

Dr. O'Mahar treats this condition more than 97% of her peers

Rating Includes other areas of care:

  • Multiple Myeloma
Anemia
very high
very high

Treatment Frequency

Dr. O'Mahar treats Anemia more than 96% of her peers

Dr. O'Mahar treats this condition more than 96% of her peers

Rating Includes other areas of care:

  • Acquired Aplastic Anemia
  • Anemia of Pregnancy
  • Aplastic Anemia
  • Atypical Hemolytic Uremic Syndrome
  • Autoimmune Hemolytic Anemia (AIHA)
  • Chronic Anemia
  • Cold Autoimmune Hemolytic Anemia
  • D-Negative Hemolytic Uremic Syndrome (D - HUS)
  • D-Negative Hemolytic Uremic Syndrome, Pregnancy Related
  • D-Positive Hemolytic Uremic Syndrome (D + HUS)
  • Diamond-Blackfan Anemia
  • Hemolytic Anemia, Acquired Autoimmune
  • Hemolytic Uremic Syndrome
  • Hereditary Spherocytosis
  • Iron Deficiency Anemia
  • Megaloblastic Anemia
  • Microcytic Hypochromic Anemia
  • Myelpathic Anemia
  • Neonatal Anemia
  • Nutritional Anemia
  • Nutritional Sideroblastic Anemia
  • Pernicious Anemia
  • Refractory Anemia With Excess Blasts
  • Refractory Anemia With Excess Blasts-1
  • Refractory Anemia With Excess Blasts-2
  • Secondary Cold Autoimmune Hemolytic Anemia
  • Sideroblastic Anemia
  • Sideroblastic Anemia With Spinocerebellar Ataxia
  • Sideroblastic Anemia, Pyridoxine-Responsive, Autosomal Recessive
  • Warm Autoimmune Hemolytic Anemia
Hide other areas of care
Acute Leukemia
high
high

Treatment Frequency

Dr. O'Mahar treats Acute Leukemia more than 91% of her peers

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

Rating Includes other areas of care:

  • Acute Lymphocytic Leukemia
  • Acute Lymphocytic Leukemia, Adult
  • Acute Myeloblastic Leukemia Type 1
  • Acute Myeloblastic Leukemia Type 2
  • Acute Myeloblastic Leukemia Type 3
  • Acute Myeloblastic Leukemia Type 4
  • Acute Myeloblastic Leukemia Type 5
  • Acute Myeloblastic Leukemia Type 6
  • Acute Myeloblastic Leukemia Type 7
  • Acute Myeloid Leukemia
  • Leukemia, Lymphocytic, Acute, L1
  • Leukemia, Lymphocytic, Acute, L2
  • Leukemia, Lymphocytic, Acute, L3
  • Leukemia, Myeloid, Aggressive-Phase
  • Leukemia, Myeloid, Philadelphia - Negative
  • Leukemia, Myeloid, Philadelphia - Positive
Hide other areas of care

Dr. O'Mahar's conditions and procedures:

  • Abdominal Pain
  • Abnormal Thyroid
  • Acute Deep Vein Thrombosis (DVT)
  • Acute Leukemia
  • Acute Myeloid Leukemia
  • Acute Sinusitis
  • Acute Tonsillitis
  • Acute Upper Respiratory Infection
  • Acute Venous Embolism Thrombosis
  • Administrative Physical
  • All Headaches (incl. Migraine)
  • Anemia
  • Anxiety
  • Arthritis
  • Arthritis of the Elbow
  • Asthma
  • Asymptomatic Post-Menopausal Status
  • Atherosclerosis
  • Back Pain
  • Bladder Infection
  • Bleeding Disorders
  • Blood in Urine (Hematuria)
  • Bone Marrow Biopsy
  • Bronchitis
  • Calcium Metabolism Disorders
  • Candidiasis of Skin and Nails
  • Central Nervous System Lymphoma
  • Chest Pain
  • Chronic Lymphocytic Leukemia
  • Chronic Myeloid Leukemia (CML)
  • Chronic Pain
  • Chronic Sinusitis
  • Coagulation Disorders (incl. Hemophilia)
  • Constipation
  • COPD (Chronic Obstructive Pulmonary Disease)
  • Cough
  • Cryoglobulinemia
  • Deep Vein Thrombosis (DVT)
  • Dehydration
  • Dermatitis
  • Diabetes Counseling
  • Diabetes Mellitus, Secondary
  • Diabetes Type 2
  • Diabetes With Renal Manifestations
  • Diabetic Polyneuropathy
  • Diarrhea
  • Diverticulitis, Intestinal
  • Diverticulosis, Intestinal
  • Dyslipidemia
  • Dysphagia
  • Electrocardiogram (EKG)
  • Emphysema
  • Enlarged Prostate (BPH)
  • Enteritis
  • Familial Hypercholesterolemia
  • Fever
  • Fibromyalgia
  • Gas-Bloat Syndrome
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Gout
  • Headache
  • Heart Disease
  • Hemophilia
  • Hernia
  • Hypercalcemia
  • Hyperkalemia
  • Hyperlipidemia
  • Hypertension
  • Hypoglycemia
  • Hypokalemia
  • Hypotension
  • Hypotension (Excluding Maternal)
  • Hypothyroidism
  • Immune Thrombocytopenic Purpura (ITP)
  • Immunization Administration
  • Insomnia
  • Iron Metabolism Disorders
  • Itchy Skin
  • Joint Pain
  • Leukocytosis
  • Limb Pain
  • Limb Swelling
  • Limb Swelling Caused by Fluid Overload
  • Lipid Disorders
  • Low Back Pain
  • Lymphocytosis
  • Magnesium Metabolism Disorders
  • Malaise and Fatigue
  • Malnutrition
  • Menopausal and Postmenopausal Disorders
  • Mineral Metabolism Disorders
  • Muscle Spasm
  • Muscle Weakness
  • Myelodysplastic Syndromes
  • Myeloma
  • Myeloproliferative Disorders
  • Nail and Nail Bed Infection
  • Nausea
  • Neutropenia
  • Nighttime Urination (Nocturia)
  • Non-Hodgkin's Lymphoma
  • Noninfectious Gastroenteritis and Colitis
  • Nosebleed
  • Obesity
  • Osteoarthritis
  • Osteoarthritis of Ankle and Foot
  • Osteoarthritis of Hip
  • Osteoarthritis of Hip and Thigh
  • Osteoarthritis of Knee
  • Osteoarthritis of Shoulder
  • Osteoarthritis of Spine
  • Osteopenia
  • Osteoporosis
  • Overweight
  • Painful Urination (Dysuria)
  • Pancytopenia
  • Plasmapheresis
  • Pneumonia
  • Polycythemia Rubra Vera
  • Polymyalgia Rheumatica (PMR)
  • Polyneuropathy
  • Polyuria
  • Primary Central Nervous System Lymphoma
  • Proteinuria
  • Purpura
  • Radiculopathy (Not Due to Disc Displacement)
  • Rash
  • Sarcoidosis
  • Sciatica (Not Due to Disc Displacement)
  • Shortness of Breath
  • Sinus Tachycardia
  • Sinusitis
  • Sleep Apnea
  • Thalassemia
  • Thrombocytosis
  • Thyroid Goiter
  • Tobacco Use Disorder
  • Tonsillitis
  • Transient Ischemic Attack (TIA)
  • Urinary Incontinence
  • Urinary Stones
  • Urinary Tract Infection (UTI)
  • Venous Embolism and Thrombosis
  • Venous Insufficiency
  • Vitamin B Deficiency
  • Vitamin B12 Deficiency
  • Vitamin D Deficiency
  • Wheezing

Insurance Check

Search for your insurance provider

Dr. O'Mahar accepts

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

(608) 371-8000

Dr. O'Mahar accepts the following insurance:

Aetna
Choice Plus POS II
Anthem
Balanced Blue Access-WI PPO
Balanced Blue Preferred-WI POS
Blue Access Network (Wisconsin) PPO
Blue Access w/ Pref Retail Clinics-WI PPO
Blue Preferred (Select Network)-WI POS
Blue Preferred Network-WI
Blue Preferred Plus w/ Pref Retail Clinics-WI POS
Blue Preferred Plus-WI POS
Blue Traditional Network-WI
Bronze Blue Access-WI PPO
Bronze Blue Preferred-WI POS
Gold Blue Access-WI PPO
Gold Blue Preferred-WI POS
Lumenos plans - Blue Access-WI
Lumenos plans - Blue Preferred-WI
National (BlueCard Basic) PPO
National (BlueCard) PPO
Platinum Blue Access-WI PPO
Platinum Blue Preferred-WI POS
Silver Blue Access-WI PPO
Silver Blue Preferred-WI POS
Anthem Blue Cross Blue Shield
Anthem Blue Cross Blue Shield HMO
Blue Preferred Plus POS
AvMed
Open Access
Blue Cross Blue Shield
Blue Card PPO
CareFirst Blue Cross Blue Shield
HealthyBlue 2.0
HealthyBlue Advantage
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

Dr. O'Mahar's Reviews

Likelihood to recommend Dr. O'Mahar

4.0

Based on 4 ratings

5 Stars
75%
(3)
4 Stars
0%
(0)
3 Stars
0%
(0)
2 Stars
0%
(0)
1 Star
25%
(1)
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How likely are you to recommend
Dr. O'Mahar?
(Select your rating)
What went well
  • Office environment (4)
  • Appointment scheduling (3)
  • Appointment wasn't rushed (3)
What could be improved
  • Appointment was rushed (1)
  • Didn't explain conditions well (1)
  • Didn't listen or answer questions (1)
Reply Flag
Dr. O'Mahar is the best in the business! She has been absolutely wonderful to myself, and my family and has saved my life. Thank you Dr. O'Mahar!
What went well
  • Appointment scheduling
  • Office environment
  • Staff friendliness
  • Wait times
  • Appointment wasn't rushed
  • Listened & answered questions
  • Explained conditions well
  • Trusted the provider's decisions
What could be improved
No results
Helpful
Feb 12, 2021
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About Me

Biography

Dr. Shannon O'Mahar, MD is a Medical Oncology Specialist in Janesville, WI and has over 16 years of experience in the medical field. She graduated from...Read more

Specialties

  • Medical Oncology
  • Hematology
  • Internal Medicine

Board Certifications

  • Hematology
  • Medical Oncology

Education

2012
University Of Wisconsin Hospital and Clinics
Fellowship Hospital
2008
Barnes-Jewish Hospital
Residency Hospital
2006
Barnes - Jewish Hospital
Internship Hospital
2005
Washington Univ Sch of Med
Medical School
2000
Stanford U
Undergraduate School

Awards

Frequently Asked Questions

Does Dr. Shannon O'Mahar, MD offer telehealth services?

Dr. O'Mahar has indicated that they offer telehealth. Contact the office to check for eligibility for your needs.

Is Dr. Shannon O'Mahar, MD accepting new patients?

Dr. Shannon O'Mahar, MD generally accepts new patients on Healthgrades. You can see Dr. O'Mahar's profile to make an appointment.

Does Dr. Shannon O'Mahar, MD accept my insurance?

Use the Healthgrades insurance check to verify if Dr. O'Mahar accepts your insurance.

What are Dr. Shannon O'Mahar, MD's top areas of care?

Dr. O'Mahar frequently treats Myeloma, Anemia, and Acute Leukemia. See all procedures and conditions Dr. O'Mahar treats.

Where is Dr. Shannon O'Mahar, MD's office located?

Dr. O'Mahar's office is located at 3200 E Racine St, Janesville, WI 53546. Find other locations and directions on Healthgrades.

How can I make an appointment with Dr. Shannon O'Mahar, MD?

Find contact information here to make an appointment.

Locations

Dean Clinic Oncology Janesville

Alliance Healthcare Services Inc.3200 E Racine St Janesville, WI 53546
1

Dean Clinic HEM and ONL

Ssm Health Cancer Care1200 John Q Hammons Dr Ste 400 Madison, WI 53717
2

Affiliated Hospitals

Dr. O'Mahar is affiliated with the following hospitals. Select a hospital below to learn more.

Learn more about how Healthgrades measuresHospital Quality.

Edgerton Hospital And Health Services

Edgerton, WI

79% Patient experience rating, 10% higher than the national average

Ssm Health Saint Mary's Hospital Janesville

Janesville, WI

80% Patient experience rating, 11% higher than the national average

7 Awards Received

Ssm Health Saint Mary's Hospital Madison

Madison, WI

77% Patient experience rating, 8% higher than the national average

15 Awards Received

Upland Hills Health

Dodgeville, WI

88% Patient experience rating, 19% higher than the national average