Tim G. Larson, MD

Prior to joining the practice in 1995, Tim G. Larson, MD, was at the University of California Davis Medical Center in Sacramento, where he finished his fellowship training in hematology and oncology. Dr. Larson also completed his resident's training at the University of California Davis Medical Center. A northern California native, Dr. Larson received both a master's degree from the University of California at Berkeley in 1987, and his medical degree in 1989 from the University of California at San Francisco. Dr. Larson graduated in 1984 from the University of California at Santa Cruz. He is board certified in internal medicine and medical oncology and is a member of the American Society of Clinical Oncology.

Avanti Mehrotra, MD

Dr. Mehrotra's professional specialties include malignancies of the aerodigestive tract (head and neck, esophageal, lung), non Hodgkin lymphomas and heme-thrombosis.

She is married and has two sons. Her husband is an interventional cardiologist with North Memorial's Heart & Vascular Institute.

In her spare time she enjoys swimming, creative dancing, playing basketball and traveling to historic places with her family.

Harold N. Londer, MD

Harold N. Londer, MD, studied psychology and chemistry at the University of Minnesota, receiving his bachelor's degree with honors. In 1973, he earned his medical degree from the University of Minnesota. For his post-graduate medical training, Dr. Londer completed an internal medicine residency at the University of Minnesota Hospital. He served as a Lieutenant Commander in the United States Public Health Services, and also as a clinical associate at the National Cancer Institute in Bethesda, Maryland. Dr. Londer is board certified in internal medicine and medical oncology. He is a member of the American Society of Clinical Oncology. He is an Associate Clinical Professor at the University of Minnesota Medical School.

Dr. Londer is available for appointments at the Robbinsdale office.

Amy Stella, MD

Amy Stella, MD, is a 1998 graduate of the Medical College of Wisconsin and is a member of the Alpha Omega Alpha Medical Honor Society. Following medical school, she continued her education at the University of Wisconsin Hospital and Clinics where she completed her internship and residency in internal medicine. Dr. Stella served as a chief resident which allowed her to spend time teaching residents and medical students.

In 2000, she completed her fellowship in medical oncology at the University of Wisconsin Comprehensive Cancer Center. She developed a special interest in treating patients with breast and gastrointestinal cancers.

Rebecca Thomas, M.D.

After completing medical school at the Medical College of Wisconsin and internal medicine residency at Hennepin County Medical Center, Dr. Rebecca Thomas headed east for her fellowship in Hematology/Oncology at the National Cancer Institute at the National Institutes of Health. During her tenure at the NCI, she was chief fellow, received the ASCO Merit Award and earned a Master of Health Sciences in Clinical Research from Duke University.

Dr. Thomas' prior clinical positions include assistant professor of medicine at the Feinberg School of Medicine, Northwestern University and Senior Associate Consultant at the Mayo Clinic. She has published in major medical journals and maintains a strong interest in the field of colorectal cancer. She completed her internship and residency at Hennepin County Medical Center.

Her professional affiliations include: American Society of Clinical Oncology and the American Society of Hematology. A special area of interest is gastrointestinal malignancies.

Uzma Ali, MD

Uzma Ali, MD, is a graduate of Mayo Clinic's hematology/oncology program. She completed residencies at Frankford hospital in Philadelphia and at Abington Memorial Hospital, part of Temple University, in Abington, Pennsylvania.

She received a Bachelor of Medicine and Surgery from King Edward Medical University, Lahore, Pakistan.

She is board eligible for hematology and oncology, and board certified in internal medicine. She is a member of the American Society of Clinical Oncology, the American Society of Hematology and the American Medical Association.

In her spare time she enjoys biking and spending time with her family.

Thomas Amatruda, MD

Thomas Amatruda, MD, is a graduate of Harvard College and Yale Medical School. He completed his postdoctoral training in internal medicine at the University of California, San Francisco; hematology and medical oncology at the University of California, Los Angeles; and molecular biology at the California Institute of Technology in Pasadena.

Prior to joining the Humphrey Cancer Center, Dr. Amatruda was a member of the Medical Oncology section at the University of Minnesota, where his work focused on research of the molecular biology of cell signaling. He also served as the university's co-director of the Familial Cancer Program and the Melanoma Program.

Dr. Amatruda is board certified in internal medicine and medical oncology, and his clinical interests include the biology and treatment of malignant melanoma, the genetics of familial cancer, and the development of therapies for cancer. He provides medical oncology care at the Fridley office and genetic counseling and treatment of melanoma at the Robbinsdale and Fridley offices.

Heather Penning, RN, CNP, MS

Heather Penning has an undergraduate degree in nursing from Viterbo University in LaCrosse, Wisconsin. Her first nursing job after college was on an oncology unit in Colorado.

She received her Masters in Oncology Nursing from the University of Minnesota and her Nurse Practitioner Certificate from the College of St. Catherine. She has a special interest in symptom management and the psychosocial coping that accompanies a cancer diagnosis.

She provides symptom management, urgent care and routine follow-up care to patients at the Robbinsdale and Wyoming Humphrey Cancer Center locations.