The Margie Petersen Breast Center, a Center of Excellence

The Margie Petersen Breast Center at Providence Saint John’s Health Center provides comprehensive breast health and breast cancer care, bringing together rapid evaluation, advanced imaging, multidisciplinary treatment, research and supportive services in one coordinated program.

Multi-disciplinary Breast Oncology Team - Margie Peteresen Breast Center Breast Team Grumley and Patient - Margie Petersen Breast Center Breast Lighting event - Margie Petersen Breast Center Breast Team Nurse Navigators - Margie Petersen Breast Center Breast Team Imaging - Margie Petersen Breast Center Breast Team Epigenetics - Margie Petersen Breast Center

The Margie Petersen Breast Center at Providence Saint John’s Health Center provides comprehensive breast health and breast cancer care, bringing together timely evaluation, advanced breast imaging, multidisciplinary treatment, research and supportive services in one coordinated program.

Whether you have discovered a new breast change, received an abnormal imaging result, are concerned about breast cancer risk or have already been diagnosed with breast cancer, our specialists can help determine what the finding means and what should happen next.

Breast Care Starts With Answers

A breast concern does not automatically mean breast cancer. Many breast changes have benign causes, but a new or unexplained finding deserves appropriate evaluation. Our goal is to help you move from uncertainty to a clear understanding of the finding and the next step in care.

The Margie Petersen Breast Center includes a dedicated Breast Clinic designed to help patients with new or concerning breast findings receive evaluation quickly. By coordinating clinical examination, diagnostic imaging and biopsy when needed, our goal is to provide answers sooner rather than leaving patients waiting through multiple appointments.

I Found a Lump or Other Breast Change

A new breast lump, nipple change, breast pain, skin change or other symptom can have many possible causes. Evaluation begins with the history of the change and a clinical breast examination, followed by diagnostic imaging or biopsy when appropriate. Patients with a new breast concern may be evaluated even when breast cancer has not been diagnosed.

Learn more about breast health and common breast conditions.

My Mammogram or Imaging Was Abnormal

Breast Mammogram Evaluation - Saint John's Health Center
Breast Mammogram & Consultation at Margie Peteresen Breast Center

An abnormal mammogram, ultrasound or other breast imaging result does not necessarily mean cancer. Additional imaging or tissue sampling may be recommended to determine whether the finding is benign or requires treatment. Our breast specialists coordinate clinical examination, diagnostic imaging and biopsy when needed so patients can understand the finding and move efficiently toward the appropriate next step.

Learn more about breast evaluation.

I Am Concerned About My Breast Cancer Risk

Personal health history, family history, breast density, previous breast biopsies and inherited genetic changes can influence breast cancer risk. For some patients, understanding risk can affect screening recommendations, genetic counseling or other preventive strategies. The Breast Center can help determine which risk factors are relevant and whether additional evaluation, surveillance or genetic counseling should be considered.

Learn more about family history, genetic testing and inherited breast cancer risk.

I Have Been Diagnosed With Breast Cancer

A breast cancer diagnosis brings a different set of questions: What type of cancer is it? Has it spread? Will I need surgery, radiation or medication? What are my options for breast reconstruction, and how quickly do decisions need to be made? Our multidisciplinary team reviews the pathology, imaging, tumor biology and other clinical findings to develop an individualized treatment plan.

Learn more about understanding a breast cancer diagnosis.

Comprehensive, Multidisciplinary Breast Care

Breast care often involves more than one specialty. At the Margie Petersen Breast Center, breast surgeons trained in onco-plastic surgery, medical oncologists, radiation oncologists, breast imaging specialists, pathologists, genetics professionals, nurses and supportive-care specialists collaborate throughout diagnosis and treatment.

This team-based approach allows decisions to be made with the full clinical picture in mind. Imaging, pathology, tumor biology, surgical options, radiation planning, medical treatment and patient priorities can all influence one another, so coordination helps ensure that each part of care supports the overall treatment plan.

Coordinated Care From Diagnosis Through Recovery

Multi-disciplinary Breast Oncology Team at Margie Peteresen Breast Center
Multi-disciplinary Breast Oncology Team at Margie Peteresen Breast Center

For a patient undergoing breast evaluation, collaboration may mean coordinating diagnostic imaging and biopsy so the cause of an abnormal finding can be determined efficiently. For a patient with breast cancer, it may mean discussing whether surgery, medical treatment or radiation should come first and how one treatment may affect the options available later.

Treatment planning is another example of the importance of care coordination. Breast surgeons trained in oncoplastic techniques work with medical oncologists, radiation oncologists, genetics specialists and wellness professionals to coordinate care around the individual patient. This approach supports more coordinated decision-making and can help reduce unnecessary delays between different parts of care.

Treatment Decisions Are Individualized

Two patients with breast cancer may have very different treatment plans. Recommendations can depend on cancer type, tumor size, lymph node involvement, hormone receptor and HER2 status, genomic information when appropriate, overall health and personal preferences.

Our goal is not to apply the same sequence of treatment to every patient, but to explain the available options and develop a plan based on the clinical findings and what matters most to the individual.

Breast Health & Breast Cancer Care

The Margie Petersen Breast Center provides care across the breast-health continuum, from evaluation of benign breast conditions and cancer risk to diagnosis, treatment, breast reconstruction, recovery and survivorship.

Breast Health

Breast symptoms such as lumps, pain, nipple changes, skin changes and other findings are common and often benign. Our breast specialists evaluate these concerns while also considering family history, genetics and other factors that may influence breast cancer risk.

Explore Breast Health & Conditions.

Breast Evaluation

Breast evaluation and consultation - Margie Peteresen Breast Center
A breast evaluation can help answer questions about next steps.

When a breast concern or abnormal screening result needs further assessment, evaluation may include clinical examination, diagnostic mammography, ultrasound, MRI or biopsy depending on the finding. The goal is to identify the cause and determine the appropriate next step without unnecessary delay.

Learn more about Breast Evaluation.

Breast Cancer Treatment

Breast cancer treatment may involve surgery, radiation therapy, chemotherapy, endocrine therapy, targeted therapy, immunotherapy or a combination of approaches. The sequence and combination of treatments depend on the biology and extent of the cancer and the patient’s individual needs.

Explore Breast Cancer Treatment.

Breast Reconstruction

For patients undergoing mastectomy, breast reconstruction may be considered during the same operation or at a later time. Implant-based and autologous reconstruction are among the available approaches, while some patients choose not to reconstruct.

Learn more about Breast Reconstruction.

Support Beyond Treatment

Breast cancer can affect far more than the breast itself. Treatment may influence strength, mobility, nutrition, sleep, emotional health, relationships, concentration and everyday responsibilities. Supportive care helps address these effects alongside medical treatment rather than waiting until treatment is over.

Through the Margie Petersen Breast Center and Providence Saint John’s Health Center, patients may receive support with nutrition, rehabilitation, psycho-oncology, stress management, social work, spiritual care, symptom management and other needs that arise during diagnosis, treatment and recovery.

Wellness During Treatment and Recovery

Wellness during breast cancer treatment and recovery
Coordinated wellness services help patients manage fatigue, stress and other physical and emotional effects throughout cancer treatment and their recovery.

Wellness services can help patients manage fatigue, changes in strength or mobility, treatment-related symptoms, nutrition concerns and stress while also supporting long-term health. Recommendations are individualized according to the patient’s treatment, recovery and personal priorities.

Programs through the Breast Center may include nutrition counseling, physical rehabilitation, mindfulness and stress reduction, psycho-oncology and other supportive services.

Explore Breast Cancer Wellness & Supportive Care.

Support for Patients and Families

A cancer diagnosis can affect partners, children, caregivers and other family members as well as the patient. Counseling, caregiver resources and practical support can help families communicate, manage changing responsibilities and navigate the emotional and practical demands of cancer care.

Explore Patient and Caregiver Resources.

Research Connected to Patient Care

The Margie Petersen Breast Center is closely connected with researchers at Saint John’s Cancer Institute. Physicians and scientists work across clinical care, translational research and clinical trials to better understand breast cancer biology and evaluate new approaches to diagnosis and treatment.

This connection allows discoveries involving tumor biology, biomarkers, genetics, treatment response and other areas of breast cancer research to inform the questions being studied in the laboratory and clinic. It also gives eligible patients opportunities to learn about clinical trials when an investigational treatment or research study may be appropriate.

Clinical Trials

Breast research and clinical trials - Saint John's Cancer Institute
Breast cancer research and clinical trials – Saint John’s Cancer Institute

Clinical trials evaluate new treatments, combinations of therapies and other approaches to breast cancer care. Eligibility depends on the individual study and may include factors such as breast cancer subtype, stage, biomarkers, previous treatment and overall health. Participation is always voluntary, and a clinical trial is considered within the context of the patient’s overall treatment options.

Explore Breast Cancer Research & Clinical Trials.

Advancing Personalized Breast Cancer Care

Breast cancers that appear similar can behave differently because of their molecular and genetic characteristics. Research into these differences continues to improve how physicians identify risk, select treatments and understand why some cancers respond differently than others.

As new evidence emerges, the goal is to make treatment increasingly precise while avoiding therapies that are unlikely to provide meaningful benefit.

Comprehensive Breast Care, Two Locations

Patients can access coordinated breast care through Providence Saint John’s Health Center in Santa Monica and the Roy and Patricia Disney Family Cancer Center at Providence Saint Joseph Medical Center in Burbank. Both locations are part of a connected breast care program designed to provide consistent evaluation, treatment planning and follow-up.

One Coordinated Team

Selected physicians provide care across both locations, helping support continuity when patients need services in Santa Monica or Burbank. Treatment recommendations are coordinated within the larger multidisciplinary breast program so patients can receive care close to home while remaining connected to the same broader clinical network.

Santa Monica

Providence Saint John's Health Center in Santa Monica, California

Providence Saint John’s Health Center in Santa Monica.

Burbank

Roy and Patricia Disney Family Cancer Center in Burbank, California

Roy and Patricia Disney Family Cancer Center in Burbank.

The Margie Petersen Breast Center at Providence Saint John’s Health Center provides breast evaluation, imaging, surgery, medical oncology, radiation oncology, reconstruction, supportive care and access to research and clinical trials.

The Breast Health Center at the Roy and Patricia Disney Family Cancer Center provides breast evaluation, imaging, biopsy, genetics and multidisciplinary cancer care for patients in the Burbank area.

We Are Ready to Support You

Whether you are concerned about a new breast change, need additional evaluation after imaging, want to better understand your breast cancer risk or have already received a diagnosis, the Margie Petersen Breast Center can help you determine the next step.

Our goal is to provide timely answers, coordinated care and a treatment plan built around the individual patient.

Talk With Our Breast Clinic Team

The Breast Health Clinic can be reached at (310) 582-7209. If you have questions about a new breast symptom, need an evaluation or would like help determining your next step, call and a member of our team can assist you.

Meet Our Breast Health Experts Contact Us

Margie Petersen Breast Team

Patient Resources

Breast care can involve a lot of information at once. Our patient resources are designed to help you understand your diagnosis, prepare for care, explore supportive services and find reliable information between visits.

Breast Center Patient Resources

Find breast health information, treatment resources, new patient materials, hereditary cancer risk information and trusted national organizations for additional education and support.

Explore Breast Patient Resources.

Breast Center Patient FAQs

Get concise answers to common questions about evaluation, multidisciplinary care, treatment planning, breast reconstruction, clinical trials, wellness and other aspects of breast care.

Read Breast Center Patient FAQs.

Breast Cancer Webinars

Watch educational presentations from breast specialists and other clinicians on screening, treatment, wellness, recovery and survivorship.

Watch Breast Cancer Webinars.

Keeping You Safe

Review practical information about preparing for appointments and procedures, medication safety, infection prevention, mobility, visitors and communicating concerns with your care team.

Learn How We Help Keep You Safe.