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    Last Updated: 02/22/2026

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    MediFind found 20 doctor with experience in HER-2 Positive Breast Cancer near Longmont, CO. Of these, 15 are Advanced and 5 are Experienced.

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    20 providers found
      Advanced in HER-2 Positive Breast Cancer

      Dr. Sara D. Robinson
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Sara D. Robinson
      Oncology

      Rocky Mountain Cancer Centers LLP

      1760 E Ken Pratt Blvd, Ste 302, 
      Longmont, CO 
       (2.4 miles away)
      303-684-1900
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients
      Offers Telehealth

      Sara Robinson is an Oncologist in Longmont, Colorado. Dr. Robinson is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Breast Cancer, Paget Disease of the Breast, Chronic Lymphocytic Leukemia (CLL), and Pleuropulmonary Blastoma. Dr. Robinson is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. John M. Barnett
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. John M. Barnett
      Oncology

      Rocky Mountain Cancer Centers LLP

      1760 E Ken Pratt Blvd, Ste 302, 
      Longmont, CO 
       (2.4 miles away)
      303-684-1900
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      John Barnett is an Oncologist in Longmont, Colorado. Dr. Barnett is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Appendix Cancer, Colorectal Cancer, Familial Colorectal Cancer, and Paget Disease of the Breast. Dr. Barnett is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Kelly N. Casteel
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Kelly N. Casteel
      Oncology

      Rocky Mountain Cancer Centers LLP

      1760 E Ken Pratt Blvd, Ste 301, 
      Longmont, CO 
       (2.4 miles away)
      303-684-1877
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients
      Offers Telehealth

      Kelly Casteel is an Oncologist in Longmont, Colorado. Dr. Casteel is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Thrombocytopenia, Agranulocytosis, Chronic Familial Neutropenia, and HER-2 Positive Breast Cancer. Dr. Casteel is currently accepting new patients.

      Learn about our expert tiers
      Advanced in HER-2 Positive Breast Cancer

      Dr. Hossein Maymani
      Hematology Oncology | Hematology | Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Hossein Maymani
      Hematology Oncology | Hematology | Oncology

      Rocky Mountain Cancer Centers Llp

      2030 Mountain View Ave, Suite 210, 
      Longmont, CO 
       (1.7 miles away)
      303-684-1900
      Languages Spoken:
      English
      See accepted insurances
      Offers Telehealth

      Hossein Maymani is a Hematologist Oncology specialist and a Hematologist in Longmont, Colorado. Dr. Maymani is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Lung Cancer, Chronic B-Cell Leukemia (CBCL), Richter Syndrome, and Chronic Lymphocytic Leukemia (CLL).

      Advanced in HER-2 Positive Breast Cancer

      Dr. Gerlinde S. Tynan
      General Surgery
      Advanced in HER-2 Positive Breast Cancer

      Dr. Gerlinde S. Tynan
      General Surgery

      Rocky Mountain Cancer Centers LLP

      1760 E Ken Pratt Blvd, Ste 301, 
      Longmont, CO 
       (2.4 miles away)
      303-684-1877
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Gerlinde Tynan is a General Surgeon in Longmont, Colorado. Dr. Tynan is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Breast Cancer, Paget Disease of the Breast, Intraductal Papilloma, HER-2 Positive Breast Cancer, and Lymphadenectomy. Dr. Tynan is currently accepting new patients.

      Experienced in HER-2 Positive Breast Cancer

      Dr. Lovie D. Bey
      Oncology | Hematology
      Experienced in HER-2 Positive Breast Cancer

      Dr. Lovie D. Bey
      Oncology | Hematology

      Lovie D. Bey,MD

      2030 Mountain View Ave, 
      Longmont, CO 
       (1.7 miles away)
      303-925-4210
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Lovie Bey is a Hematologist and an Oncologist in Longmont, Colorado. Dr. Bey is rated as an Experienced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Paget Disease of the Breast, Colorectal Cancer, Breast Cancer, and Familial Colorectal Cancer. Dr. Bey is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Dario Pasalic
      Radiation Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Dario Pasalic
      Radiation Oncology

      Rocky Mountain Cancer Centers LLP

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Experience:
      10+ years
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Dario Pasalic is a Radiation Oncologist in Boulder, Colorado. Dr. Pasalic has been practicing medicine for over 10 years and is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are HER-2 Positive Breast Cancer, Breast Cancer, Prostate Cancer, Orchiectomy, and Gastrostomy. Dr. Pasalic is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Mark A. Sitarik
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Mark A. Sitarik
      Oncology

      Rocky Mountain Cancer Centers LLP

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Mark Sitarik is an Oncologist in Boulder, Colorado. Dr. Sitarik is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Von Willebrand Disease (VWD), Heyde Syndrome, Paget Disease of the Breast, and Breast Cancer. Dr. Sitarik is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Austin I. Poole
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Austin I. Poole
      Oncology

      Rocky Mountain Cancer Centers LLP

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Austin Poole is an Oncologist in Boulder, Colorado. Dr. Poole is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Prostate Cancer, Colorectal Cancer, Familial Colorectal Cancer, and Familial Prostate Cancer. Dr. Poole is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Sydney Brehany
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Sydney Brehany
      Oncology

      Rocky Mountain Cancer Centers LLP - Boulder Radiation

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Sydney Brehany is an Oncologist in Boulder, Colorado. Dr. Brehany is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are HER-2 Positive Breast Cancer, Paget Disease of the Breast, Breast Cancer, and Triple-Negative Breast Cancer. Dr. Brehany is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Leslie T. Busby
      Hematology | Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Leslie T. Busby
      Hematology | Oncology

      Rocky Mountain Cancer Centers LLP

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Leslie Busby is a Hematologist and an Oncologist in Boulder, Colorado. Dr. Busby is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Familial Colorectal Cancer, Adult Soft Tissue Sarcoma, Bone Tumor, Thrombectomy, and Bone Marrow Aspiration. Dr. Busby is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Gregory J. Britt
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Gregory J. Britt
      Oncology

      Rocky Mountain Cancer Centers LLP

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients
      Offers Telehealth

      Gregory Britt is an Oncologist in Boulder, Colorado. Dr. Britt is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Hodgkin Lymphoma, Acute Mountain Sickness, Adult Soft Tissue Sarcoma, and Childhood Iron Deficiency Anemia. Dr. Britt is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Lori L. Jensen
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Lori L. Jensen
      Oncology

      Rocky Mountain Cancer Centers LLP

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Lori Jensen is an Oncologist in Boulder, Colorado. Dr. Jensen is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Paget Disease of the Breast, Breast Cancer, Small Lymphocytic Lymphoma (SLL), and Inflammatory Breast Cancer. Dr. Jensen is currently accepting new patients.

      Experienced in HER-2 Positive Breast Cancer

      Dr. Changhu Chen
      Radiation Oncology
      Experienced in HER-2 Positive Breast Cancer

      Dr. Changhu Chen
      Radiation Oncology

      Good Samaritan Medical Center - Cancer Centers Of Colorado

      340 Exempla Circle, Radiation Oncology, Floor 1, 
      Lafayette, CO 
       (10.7 miles away)
      303-673-1635
      Experience:
      42+ years
      Languages Spoken:
      English
      See accepted insurances

      Changhu Chen is a Radiation Oncologist in Lafayette, Colorado. Dr. Chen has been practicing medicine for over 42 years and is rated as an Experienced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Lung Cancer, Pleuropulmonary Blastoma, Brain Tumor, and Prostate Cancer.

      Experienced in HER-2 Positive Breast Cancer

      Dr. Kelly P. Knudson
      General Surgery
      Experienced in HER-2 Positive Breast Cancer

      Dr. Kelly P. Knudson
      General Surgery

      Lafayette Clinic - General And Trauma Surgery

      300 Exempla Circle, Suite 400, 
      Lafayette, CO 
       (13.7 miles away)
      303-689-6560
      Experience:
      23+ years
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients

      Kelly Knudson is a General Surgeon in Lafayette, Colorado. Dr. Knudson has been practicing medicine for over 23 years and is rated as an Experienced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Paget Disease of the Breast, Inflammatory Breast Cancer, Breast Cancer, and Ogilvie Syndrome. Dr. Knudson is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Kathleen M. Monahan
      Hematology | Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Kathleen M. Monahan
      Hematology | Oncology

      Rocky Mountain Cancer Centers Llp

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Offers Telehealth

      Kathleen Monahan is a Hematologist and an Oncologist in Boulder, Colorado. Dr. Monahan is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are HER-2 Positive Breast Cancer, Paget Disease of the Breast, Breast Cancer, and Triple-Negative Breast Cancer.

      Advanced in HER-2 Positive Breast Cancer

      Dr. David J. Andorsky
      Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. David J. Andorsky
      Oncology

      Rocky Mountain Cancer Centers LLP

      4715 Arapahoe Ave, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances
      Accepting New Patients
      Offers Telehealth

      David Andorsky is an Oncologist in Boulder, Colorado. Dr. Andorsky is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Follicular Lymphoma, Chronic B-Cell Leukemia (CBCL), Chronic Lymphocytic Leukemia (CLL), and Richter Syndrome. Dr. Andorsky is currently accepting new patients.

      Advanced in HER-2 Positive Breast Cancer

      Dr. Jenny R. Fox
      Hematology Oncology | Hematology | Oncology
      Advanced in HER-2 Positive Breast Cancer

      Dr. Jenny R. Fox
      Hematology Oncology | Hematology | Oncology
      4715 Araphoe Avenue, 
      Boulder, CO 
       (12.7 miles away)
      303-385-2000
      Languages Spoken:
      English
      See accepted insurances

      Jenny Fox is a Hematologist Oncology specialist and a Hematologist in Boulder, Colorado. Dr. Fox is rated as an Advanced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Paget Disease of the Breast, Breast Cancer, HER-2 Positive Breast Cancer, and Prostate Cancer.

      Experienced in HER-2 Positive Breast Cancer

      Dr. Asifa M. Malik
      Hematology Oncology | Hospital Medicine | Hematology
      Experienced in HER-2 Positive Breast Cancer

      Dr. Asifa M. Malik
      Hematology Oncology | Hospital Medicine | Hematology

      Intermountain Medical Group Denver LLC

      340 Exempla Cir, 300 Lafayette Clinic Neuro, 
      Lafayette, CO 
       (13.7 miles away)
      303-673-1390
      Languages Spoken:
      English
      See accepted insurances
      Offers Telehealth

      Asifa Malik is a Hematologist Oncology specialist and a Hospital Medicine provider in Lafayette, Colorado. Dr. Malik is rated as an Experienced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. Her top areas of expertise are Fibrolamellar Carcinoma, Breast Cancer, Inflammatory Breast Cancer, and Paget Disease of the Breast.

      Experienced in HER-2 Positive Breast Cancer

      Dr. Andrew M. Knight
      Radiation Oncology
      Experienced in HER-2 Positive Breast Cancer

      Dr. Andrew M. Knight
      Radiation Oncology

      Intermountain Medical Group Denver LLC

      340 Exempla Cir, 300 Lafayette Clinic Neuro, 
      Lafayette, CO 
       (13.7 miles away)
      303-673-1390
      Languages Spoken:
      English
      See accepted insurances

      Andrew Knight is a Radiation Oncologist in Lafayette, Colorado. Dr. Knight is rated as an Experienced provider by MediFind in the treatment of HER-2 Positive Breast Cancer. His top areas of expertise are Breast Cancer, Prostate Cancer, Familial Prostate Cancer, and Angiosarcoma.

      Showing 1-20 of 20

      Last Updated: 02/22/2026

      What is the definition of HER-2 Positive Breast Cancer?

      HER2-positive breast cancer is a subtype of breast cancer that contains human epidermal growth factor receptor 2 (HER2), which is a protein that increases the growth of cancer cells. One out of five breast cancers contain the HER2 protein. Eighteen-to-twenty percent of invasive breast cancers are HER2-positive, which are more aggressive than other breast cancers, more likely to spread and relapse, and have resulted in a decreased survival rate in the past. While previously considered to be the most aggressive type of breast cancer, HER-2 positive breast cancer can now be treated with new biologic targeted therapies that have significantly improved outcomes. HER2-positive breast cancer is categorized in stages that take into account the diameter of the tumor, whether the cancer has spread to axillary (underarm) lymph nodes, and whether the cancer has spread to other organs, such as the liver, lung, brain and bone. Staging allows for treatment plans that target each patient’s individual breast cancer disease. Early breast cancers are staged based on the following criteria: Stage 0 – Ductal cancer in situ (DCIS), or a noninvasive breast cancer that is limited to the ducts. Stage I (A/B) – Cancer has spread from ducts to the surrounding fatty breast tissue. Tumor is smaller than 2 centimeters and has not spread to lymph nodes. Stage II (IIA/B) – Cancer has spread from ducts to the surrounding fatty breast tissue and may have spread to near lymph nodes. Tumor is between 2-to-5 centimeters wide. Advanced breast cancers are staged based on the following criteria: Stage III (IIIA/B) – The tumor is larger than 5 centimeters, cancer may or may not have spread to lymph nodes, or the tumor is smaller, and cancer has spread to lymph nodes. Stage IV – Metastatic Breast Cancer. Cancer has spread to lymph nodes and other parts of the body, with other organs affected, such as liver, lungs, brain, or bones.

      When should I see a HER-2 Positive Breast Cancer doctor near Longmont, CO?

      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 HER-2 Positive Breast Cancer doctor near Longmont, CO?

      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 do I find the best HER-2 Positive Breast Cancer doctor near Longmont, CO?

      You can find a HER-2 Positive Breast Cancer doctor in any of the 10 largest U.S. cities by clicking below:

      HER-2 Positive Breast Cancer doctor near New York, NY
      HER-2 Positive Breast Cancer doctor near Los Angeles, CA
      HER-2 Positive Breast Cancer doctor near Chicago, IL
      HER-2 Positive Breast Cancer doctor near Houston, TX
      HER-2 Positive Breast Cancer doctor near Phoenix, AZ
      HER-2 Positive Breast Cancer doctor near Philadelphia, PA
      HER-2 Positive Breast Cancer doctor near Atlanta, GA
      HER-2 Positive Breast Cancer doctor near Boston, MA
      HER-2 Positive Breast Cancer doctor near Dallas, TX
      HER-2 Positive Breast Cancer doctor near San Jose, CA

      How does MediFind rank HER-2 Positive Breast Cancer doctors near Longmont, CO?

      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 HER-2 Positive Breast Cancer doctors near Longmont, CO?

      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 HER-2 Positive Breast Cancer doctor near Longmont, CO?

      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 HER-2 Positive Breast Cancer doctor search results page. 

      Why is it important to get a second opinion from a different HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer doctor near Longmont, CO?

      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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer doctors near Longmont, CO?

      Look for the filter feature on the left side of the HER-2 Positive Breast Cancer 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 HER-2 Positive Breast Cancer doctor that offers video calls?

      Look for the filter feature on the left-side of the HER-2 Positive Breast Cancer 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 

      Read more about our Content Policy. 

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