The 20 Best Chronic Lymphocytic Leukemia (CLL) Doctors Near Me in Oconomowoc, WI

Find the Top Chronic Lymphocytic Leukemia (CLL) Experts and Specialists

Last Updated: 09/26/2026

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MediFind found 17 doctor with experience in Chronic Lymphocytic Leukemia (CLL) near Oconomowoc, WI. Of these, 13 are Experienced, 3 are Advanced and 1 are Distinguished.

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17 providers found
    Advanced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Advanced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral required

    Vince Lombardi Cancer Clinic

    36500 Aurora Dr, 
    Summit, WI 
     (3.5 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Adam Siegel is a Hematologist and an Oncologist practicing medicine in Summit, Wisconsin. He has been practicing medicine for over 17 years. Dr. Siegel is rated as an Advanced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 43 other conditions, according to our data. His clinical expertise encompasses Adult T-Cell Leukemia, Chronic T-Cell Leukemia (CTCL), Angiosarcoma, and Inflammatory Breast Cancer. Dr. Siegel is board certified in American Board Of Internal Medicine, Hematology. Dr. Siegel is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    Vince Lombardi Cancer Clinic

    36500 Aurora Dr, 
    Summit, WI 
     (3.5 miles away)
    Experience:
    10+ years
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Phillip Knouse is a Hematologist and an Oncologist practicing medicine in Summit, Wisconsin. He has been practicing medicine for over 10 years. Dr. Knouse is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 5 other conditions, according to our data. His clinical expertise encompasses Pleuropulmonary Blastoma, Acute Myeloid Leukemia (AML), Acute Myeloblastic Leukemia without Maturation, Acute Myeloblastic Leukemia with Maturation, and Bone Marrow Aspiration. Dr. Knouse is board certified in American Board Of Internal Medicine, Hematology. Dr. Knouse is currently accepting new patients.

    Distinguished in Chronic Lymphocytic Leukemia (CLL)
    Distinguished in Chronic Lymphocytic Leukemia (CLL)
    Referral may be required

    ProHealth Cancer Center

    791 Summit Ave, 
    Oconomowoc, WI 
     (1.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Timothy Wassenaar is a Hematologist practicing medicine in Oconomowoc, Wisconsin. Dr. Wassenaar is rated as a Distinguished provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 43 other conditions, according to our data. His clinical expertise encompasses Chronic Lymphocytic Leukemia (CLL), Follicular Lymphoma, Adult Immune Thrombocytopenia, Bone Marrow Aspiration, and Tissue Biopsy. Dr. Wassenaar is currently accepting new patients.

    Learn about our expert tiers
    Advanced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Advanced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    ProHealth Cancer Center

    791 Summit Ave, 
    Oconomowoc, WI 
     (1.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Derek Serna is a Hematologist and an Oncologist practicing medicine in Oconomowoc, Wisconsin. Dr. Serna is rated as an Advanced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 30 other conditions, according to our data. His clinical expertise encompasses Tongue Cancer, Anemia, Angiosarcoma, and Breast Cancer. Dr. Serna is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    ProHealth Cancer Center

    791 Summit Ave, 
    Oconomowoc, WI 
     (1.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Kathleen Hemauer is a Hematologist and an Oncologist practicing medicine in Oconomowoc, Wisconsin. Dr. Hemauer is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). Her clinical expertise encompasses Paget Disease of the Breast, Breast Cancer, HER-2 Positive Breast Cancer, and Thrombocytopenia. Dr. Hemauer is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    ProHealth Cancer Center

    791 Summit Ave, 
    Oconomowoc, WI 
     (1.0 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Daniel Walden is a Hematologist and an Oncologist practicing medicine in Oconomowoc, Wisconsin. Dr. Walden is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). His clinical expertise encompasses Colorectal Cancer, Lynch Syndrome, Cholangiocarcinoma (Bile Duct Cancer), and Familial Colorectal Cancer. Dr. Walden is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Internal Medicine
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Internal Medicine

    ProHealth Medical Group Oconomowoc

    1185 Corporate Center Dr, 
    Oconomowoc, WI 
     (3.1 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    William Cooper is a primary care provider, practicing in Internal Medicine in Oconomowoc, Wisconsin. Dr. Cooper is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Sitosterolemia, Hypertension, Glucocorticoid-Remediable Aldosteronism, and Familial Hypertension. Dr. Cooper is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Referral may be required

    Aurora Medical Center Summit

    36500 Aurora Dr, 
    Summit, WI 
     (3.5 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Michael Thompson is a Hematologist practicing medicine in Summit, Wisconsin. Dr. Thompson is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 2 other conditions, according to our data. His clinical expertise encompasses Multiple Myeloma, Acute Myeloid Leukemia (AML), Monoclonal Gammopathy of Undetermined Significance (MGUS), and Schnitzler Syndrome. Dr. Thompson is currently accepting new patients.

    Advanced in Chronic Lymphocytic Leukemia (CLL)
    Oncology | Hematology
    Advanced in Chronic Lymphocytic Leukemia (CLL)
    Oncology | Hematology
    Referral may be required

    UW Cancer Center Johnson Creek Hematology And Medical Oncology Clinic

    250 Doctors Ct, 
    Johnson Creek, WI 
     (13.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Michael Eastman is an Oncologist and a Hematologist practicing medicine in Johnson Creek, Wisconsin. Dr. Eastman is rated as an Advanced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 29 other conditions, according to our data. His clinical expertise encompasses Angiosarcoma, Inflammatory Breast Cancer, Familial Colorectal Cancer, and Small Cell Lung Cancer (SCLC). Dr. Eastman is board certified in Medical Oncology. Dr. Eastman is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    UW Cancer Center Johnson Creek Hematology And Medical Oncology Clinic

    250 Doctors Ct, 
    Johnson Creek, WI 
     (13.6 miles away)
    Experience:
    10+ years
    Languages Spoken:
    English
    Offers Telehealth

    Rory Makielski is a Hematologist and an Oncologist practicing medicine in Johnson Creek, Wisconsin. He has been practicing medicine for over 10 years. Dr. Makielski is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 7 other conditions, according to our data. His clinical expertise encompasses Familial Colorectal Cancer, Pancreatic Cancer, Familial Pancreatic Cancer, and Multiple Myeloma. Dr. Makielski is board certified in Hematology, Internal Medicine, and Medical Oncology.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    UW Cancer Center Johnson Creek Hematology And Medical Oncology Clinic

    250 Doctors Ct, 
    Johnson Creek, WI 
     (13.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Elyse Harris is a Hematologist and an Oncologist practicing medicine in Johnson Creek, Wisconsin. Dr. Harris is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). Her clinical expertise encompasses Hodgkin Lymphoma, B-Cell Lymphoma, Non-Hodgkin Lymphoma, Thrombocytopenia, and Bone Marrow Transplant. Dr. Harris is board certified in Internal Medicine. Dr. Harris is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Nurse Practitioner | Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Nurse Practitioner | Hematology | Oncology
    Referral may be required

    UW Cancer Center Johnson Creek Hematology And Medical Oncology Clinic

    250 Doctors Ct, 
    Johnson Creek, WI 
     (13.6 miles away)
    Languages Spoken:
    English
    Accepting New Patients
    Offers Telehealth

    Nicki Seager is a Nurse Practitioner specialist and a Hematologist practicing medicine in Johnson Creek, Wisconsin. Seager, NP is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). Her clinical expertise encompasses Breast Cancer, Paget Disease of the Breast, Richter Syndrome, and Chronic Lymphocytic Leukemia (CLL). Seager, NP is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Referral may be required

    Kinex Medical Company LLC

    N16W24131 Riverwood Dr, 
    Waukesha, WI 
     (14.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Kamalesh Bala is a Hematologist practicing medicine in Waukesha, Wisconsin. Dr. Bala is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 3 other conditions, according to our data. His clinical expertise encompasses ALK-Positive Non-Small Cell Lung Cancer, Thrombocytopenia, Follicular Lymphoma, and Anemia. Dr. Bala is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    UW Health Cancer Center At ProHealth Care Pewaukee

    N16W24131 Riverwood Dr, 
    Waukesha, WI 
     (14.4 miles away)
    Experience:
    17+ years
    Languages Spoken:
    English
    Accepting New Patients

    Amy Hewuse is a Hematologist and an Oncologist practicing medicine in Waukesha, Wisconsin. She has been practicing medicine for over 17 years. Dr. Hewuse is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). She is also highly rated in 1 other condition, according to our data. Her clinical expertise encompasses Angiosarcoma of the Liver, Chronic Lymphocytic Leukemia (CLL), Richter Syndrome, and Chronic B-Cell Leukemia (CBCL). Dr. Hewuse is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Internal Medicine
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Internal Medicine

    ProHealth Medical Group Pewaukee

    N16W24131 Riverwood Dr, 
    Waukesha, WI 
     (14.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Debra Muggler is a primary care provider, practicing in Internal Medicine in Waukesha, Wisconsin. Dr. Muggler is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). She is also highly rated in 6 other conditions, according to our data. Her clinical expertise encompasses Low Sodium Level, High Cholesterol, Hypothyroidism, and Melorheostosis. Dr. Muggler is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Hematology | Oncology
    Referral may be required

    UW Health Cancer Center At ProHealth Care Pewaukee

    N16W24131 Riverwood Dr, 
    Waukesha, WI 
     (14.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Kathryn Asmus is a Hematologist and an Oncologist practicing medicine in Waukesha, Wisconsin. Dr. Asmus is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). Her clinical expertise encompasses EGFR Positive Lung Cancer, Small Cell Lung Cancer (SCLC), Non-Small Cell Lung Cancer (NSCLC), and Lung Adenocarcinoma. Dr. Asmus is currently accepting new patients.

    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Pediatrics | Internal Medicine
    Experienced in Chronic Lymphocytic Leukemia (CLL)
    Pediatrics | Internal Medicine
    Referral may be required

    ProHealth Medical Group Pewaukee

    N16W24131 Riverwood Dr, 
    Waukesha, WI 
     (14.4 miles away)
    Languages Spoken:
    English
    Accepting New Patients

    Paul O'neill is a primary care provider, practicing in Pediatrics and Internal Medicine in Waukesha, Wisconsin. Dr. O'neill is rated as an Experienced provider by MediFind in the treatment of Chronic Lymphocytic Leukemia (CLL). He is also highly rated in 10 other conditions, according to our data. His clinical expertise encompasses Multiple Myeloma, Diabetes Insipidus (DI), Neurohypophyseal Diabetes Insipidus, and High Cholesterol. Dr. O'neill is currently accepting new patients.

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    Last Updated: 09/26/2026

    What is the definition of Chronic Lymphocytic Leukemia (CLL)?

    Chronic lymphocytic leukemia (CLL) is a slow-growing cancer of the blood and bone marrow which produces high levels of abnormal white blood cells (lymphocytes). Unlike normal cells, the abnormal white blood cells in chronic lymphocytic leukemia do not fight infection properly and crowd out red blood cells and platelets, which may result in anemia, infections, and bleeding. While chronic lymphocytic leukemia starts in the bone marrow, over time the disease spreads through the bloodstream to other parts of the body, especially the lymph nodes, as well as the liver and spleen, which then become enlarged. There are two main types of chronic lymphocytic leukemia, one that progresses very slowly (B cell), and one that progresses more quickly (T cell), which is the more serious type. Diagnostic tests can determine if chronic lymphocytic leukemia is the type that progresses slowly by finding the proteins, ZAP-70 and CD38, on the leukemia cells, which can predict a better long-term outcome. Chronic lymphocytic leukemia is the most common type of leukemia in adults, and more often affects individuals who are white, middle-aged, or older, usually over the age of 70, while occurring very rarely in children. In general, chronic lymphocytic leukemia is categorized as asymptomatic (without symptoms), symptomatic, progressive, refractory (resistant to treatment), or recurrent. Chronic lymphocytic leukemia is further categorized by the following stages: Stage 0 – Too many white blood cells (lymphocytes), without any sign or symptom of leukemia. This is a slow-growing stage. Stage I – Too many white blood cells (lymphocytes) and enlarged lymph nodes. Stage II – Too many white blood cells (lymphocytes), enlarged liver, spleen, or lymph nodes. Stage III – Too many white blood cells (lymphocytes), and not enough red blood cells, enlarged liver, spleen, or lymph nodes. Stage IV – Too many white blood cells, and not enough platelets or red blood cells, enlarged liver, spleen, or lymph nodes. The stage of chronic lymphocytic leukemia helps to determine the treatment and outcome (prognosis).

    When should I see a Chronic Lymphocytic Leukemia (CLL) doctor near Oconomowoc, WI?

    There are various reasons why you may want to see a specialist, such as: 

    • Your primary care provider recommends it. 
    • Your condition requires expert knowledge and specialized care. 
    • Your symptoms persist or worsen despite treatment. 
    • You need specialized testing or procedures. 
    • You want a second opinion.  

    What should I consider when choosing a Chronic Lymphocytic Leukemia (CLL) doctor near Oconomowoc, WI?

    It’s important to see a provider with expertise in your specific condition. Each provider profile in MediFind’s doctor database includes information on which conditions they treat, years of experience, research contributions, languages spoken, insurance plans accepted, and more.  

    How does MediFind rank Chronic Lymphocytic Leukemia (CLL) doctors near Oconomowoc, WI?

    MediFind’s rankings are based on a variety of data sources, such as the number of articles a doctor has published in medical journals, participation in clinical trials and industry conferences, as well as the number of patients that provider sees for a given condition. Note that MediFind’s provider database is not based on user reviews, and providers do not pay to be included in the database. 

    What types of insurance are accepted by Chronic Lymphocytic Leukemia (CLL) doctors near Oconomowoc, WI?

    Most profiles in MediFind’s doctor database include a list of insurance plans accepted by that provider. However, it’s a good idea to contact the provider’s office to make sure they still accept your insurance, then doublecheck by contacting your insurance plan to confirm they’re in network. 

    How can I book an appointment online with a Chronic Lymphocytic Leukemia (CLL) doctor near Oconomowoc, WI?

    MediFind offers direct scheduling for certain providers using the “Request Appointment” button on that provider’s profile. If the schedule option is not available for a provider, tap the red “Show Phone Number” button on their profile to get their contact information. If you prefer to find providers who offer online scheduling, select “Schedules online” under the “Availability” category of the filter feature on the left side of the Chronic Lymphocytic Leukemia (CLL) doctor search results page. 

    Why is it important to get a second opinion from a different Chronic Lymphocytic Leukemia (CLL) doctor?

    Second opinions are an opportunity to confirm a diagnosis and its root cause, learn about alternative treatment options, or simply gain peace of mind. Many people, especially those with serious diagnoses, get second opinions so they can understand all their options and make informed decisions, so don’t hesitate to get one if you have any doubts or need more information or clarification regarding your care. Note that some insurance plans require second opinions, while others don’t cover second opinions, so be sure to confirm with your insurance provider first.   

    How can I prepare for my appointment with a Chronic Lymphocytic Leukemia (CLL) doctor near Oconomowoc, WI?

    Prepare for your appointment by gathering the following items: 

    • Copies of medical records (dating back at least one year) 
    • Your medical history, including illnesses, medical conditions, surgeries, and other doctors you see 
    • Family history of disease 
    • List of current prescription drugs, over-the-counter medicines, vitamins, and herbal remedies or supplements including names and doses 
    • Allergies to medications, food, latex, insects, etc.  
    • List of questions and concerns 
    • Your insurance card 

    You might also contact the provider’s office to see if they offer transportation or childcare services or if you’re allowed to bring a loved one for support or to take notes during your visit. 

    What questions should I ask my Chronic Lymphocytic Leukemia (CLL) doctor?

    Here are some sample questions: 

    • Can you explain in simple terms what this condition is and how it’s treated? 
    • What symptoms or side effects should I watch for? 
    • What tests will be involved, and when can I expect results? 
    • Are there other specialists I need to see? 
    • What’s the best way to reach you if I have follow-up questions? 

    How can I learn about the latest clinical trials and research advances my Chronic Lymphocytic Leukemia (CLL) doctor may know about?

    MediFind’s Clinical Trials tool asks you a series of questions to help you narrow down your search by health condition, age, gender, location, how far you’re willing to travel, and more. Each question you answer filters down the number of trials until you find the ones that are most relevant to you. 

    MediFind’s Latest Advances tool features summaries of recent articles published in medical journals. We use cutting-edge technology to scour medical publication databases for the latest research advancements on any given condition, then we simplify this information in a way that’s useful and easy to understand. 

    Can I filter my search to show male or female Chronic Lymphocytic Leukemia (CLL) doctors near Oconomowoc, WI?

    Look for the filter feature on the left side of the Chronic Lymphocytic Leukemia (CLL) doctor search results page. Select “Female” or “Male” under the “Gender” category to search for female or male providers exclusively. If the “Any” option is selected, it will pull results for both male and female providers. 

    Can I filter my search to find a Chronic Lymphocytic Leukemia (CLL) doctor that offers video calls?

    Look for the filter feature on the left-side of the Chronic Lymphocytic Leukemia (CLL) doctor search results page. Select “Offers telehealth visits” under the Availability category to search for providers who offer virtual appointments (video calls). 

    Reviewed on: 11/11/24  

    By: MediFind Medical Staff 

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