New Search 11705 Practice accepting new patients. Theresa Mortensen MSN, NP (707) 763-0600 Primary Specialties Oncology - Medical Medical Groups & Affiliations St. Joseph Health Medical Group Additional Languages Spoken English Primary Office Address: St. Joseph Health Medical Group 110 Lynch Creek Way Suite A Petaluma, CA 94954 Phone: (707) 763-0600 Fax: (707) 765-1757 Hours: Mon - Fri Web Page: www.stjosephhealthmedicalgroup.com Secondary Office Address: 1201 W. La Veta Ave. Santa Rosa, CA 95403 Phone: (707) 528-1050 Fax: (707) 525-3874 Recommend this Physician Request an Update for this Physician View this Physician's Location Physician Bio Theresa has been providing quality care as a Nurse Practitioner to oncology/nematology patients in the in-patient and outpatient environment for more than 30 years. She implemented the hereditary cancer syndrome program, which provides assessment and counseling services for high-risk individuals and their family members. Prior to her tenure as a NP, Theresa attended patients as staff nurse for Redwood Regional Medical Group from 1996 to 2002 and is now part of St. Joseph Health Medical Group, providing clinical expertise and training with the majority of her focus on solid tumors (example breast, lung, colon etc), as well as lymphomas, CML, MDS, and CLL. She is also specialty trained to perform bone marrow biopsies. Teresa loves to educate patients, families, and colleagues - when she is not seeing them in clinic, she gives educational talks on cancer genetics, metastatic colon cancer, CML, MDS, and breast cancer. Theresa is an extremly caring Nurse Practitioner and takes pride in caring for the oncology patient and their family in the outpatient setting, including the administration of chemotherapeutic agents and support measures as needed. Certifications Theresa is a member of APSHO which is an advanced practice oncology group and Sigma Theta Tau which is an honor society through SSU.