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Mary "Muff" Heffernan, ARNP

Mary J. Heffernan, AOCNP, ARNP, MN

Schedule an Appointment

To schedule an appointment with Mary J. Heffernan please call 425-688-0212.

Accepting new patients.


Year joined staff:


  • Breast Surgery



Seattle University, Bachelor of Science, Nursing
University of Washington, Master of Nursing


Born and raised in the Seattle area, Mary "Muff" enjoys a variety of outdoor activities with her husband Dan and two children, Maureen and Riley.

Currently participating in a two year teaching grant sponsored by the Bristol Myers Squibb Foundation with the University of Washington School of Nursing and the Bashkortostan Medical State University in Russia. Traveled to Russia this past summer and will return next summer, 2013 to conduct training workshops for nurses on the fundamentals of oncology nursing care and symptom management.

Practice Philosophy

Treat each patient with the same level of care and concern as I would for a member of my family.

Board Certification

Adult Nurse Practitioner, American Nurse Credentialing Center, 2009

Advanced Oncology Certified Nurse Practitioner (AOCNP),  2011

Clinical Interest

Breast Cancer Surgery, Benign Breast Disease, High-Risk Screening, Breast Cancer Survivorship.

Teaching or Professional Positions

University of Washington School of Nursing, Affiliate Faculty

Professional Memberships

American Academy of Nurse  Practitioners, Oncology Nursing Society

Honors, Awards, etc.


Office Information

Doctor's Contact Information

  • Office Phone: 425-688-0212
  • Fax: 425-688-0213

Overlake Medical Clinics Breast Surgery