Janie Weng Grumley, MD

Janie Weng Grumley, MD

Breast Surgery

Accepting New Patients

About Janie Weng Grumley, MD 

Certified by the American Board of Surgery, Janie G. Grumley, MD, is a surgical breast oncologist with expertise in treating patients with breast cancer and benign breast diseases. She specializes in unique treatments such as oncoplastic breast-conserving surgery and intraoperative radiation therapy.  

After growing up with a grandmother who had a mastectomy, Dr. Grumley knew from personal experience how deforming and emotionally scarring the operation could be. Her goal is to improve the odds for her patients and save them from experiences similar to the one her grandmother had. Her favorite part of being a physician is meeting patients and their families. She feels that the relationship between the patient surgeon creates a unique bond. Unlike with most other types of surgery, the relationship she has with her patients continues over time through surgery and follow-ups. Dr. Grumley feels that nothing is more rewarding than seeing patients thriving years after breast cancer.  

Dr. Grumley received her Bachelor of Science degree in Sports Medicine from Pepperdine University in Malibu, California. She then earned her medical doctorate at the Keck School of Medicine University of Southern California. She completed her General Surgery Internship and Residency at the LAC & USC Medical Center in Los Angeles, where she became the Administrative Chief Resident of General Surgery at LAC & USC Medical Center. She also became a Surgical Breast Oncology Fellow at the University of Southern California and is a Fellow of the American College of Surgeons (FACS).  

In her third year of residency, Dr. Grumley met her hero, a surgical breast oncologist at the University of Southern California who was transforming breast cancer care using oncoplastic surgery. This novel surgery often eliminated deformities that affected women after breast surgery. The difference these techniques made in women’s lives during and after treatment was so inspiring that she knew this was the right path.  

Dr. Grumley’s extensive experience in oncoplastic surgery allows her to perform cancer surgery using techniques that allow for cancer treatment while simultaneously preserving the breast’s esthetics. She has published numerous articles on oncoplastic surgery showing how this technique reduces the need for mastectomy and additional operations, even in patients with large breast cancers. Not only can these techniques preserve the appearance of the breast, but she has also shown that these techniques have a lower risk of surgical complications.  

Dr. Grumley was a successful competitive figure skater who traveled the world, so when not with her patients, it’s no surprise to find her in the ice rink with her children, who figure skate and play hockey. She loves cooking and spending time with her family. They all enjoy traveling together when they get the chance.  

Locations

2121 Santa Monica Blvd., Santa Monica, CA 90404

Education

Medical School
University of Southern CA, Keck School of Medicine
2005

Internship
L.A. County & USC Medical Center
General Surgery

Residency
L.A. County & USC Medical Center
General Surgery

Fellowship
University of Southern California
Surgical Breast Oncology

Reviews

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As part of ensuring you have a positive experience with Providence, our online provider directory includes ratings and patient comments for select providers. More about our survey.

  • 5
  • 213 Reviews
  • 281 Comments
  • 5
07/29/2025

My experience with Saint John's Providence is always professional and caring. I feel very confident with my doctors and the care I received.

Providence Patient
  • 5
07/29/2025

Dr grumley was excellent I went to another surgeon before seeing her that wanted to perform an unnecessary invasive surgery and Dr Grumleys approach made much more sense

Providence Patient
  • 5
07/27/2025

Dr. Grumley spent a lot of time with me talking about options for surgery and showing me pictures of results as well as showing me my scans. I felt so much more informed after our visit and was grateful there was a plan in place for my health care. Her whole staff and team was so kind and caring at this stressful time.

Providence Patient
  • 5
07/21/2025

Dr Grumley and team are an excellent example of exceptional care

Providence Patient
  • 5
07/20/2025

Dr Grumley is an A+. I haven't yet had the surgery, but the appointment to explain my cancer and my surgical options was thorough, compassionate, expert and very reassuring.

Providence Patient
  • 5
07/17/2025

Dr and staff made me feel value.

Providence Patient
  • 5
07/14/2025

Dr grumley is a fantastic, compassionate and super up to date doctor. Her fello and the entire team is absolutley superb. I refer to her whenever possible. Thank you team Grumley!

Providence Patient
  • 5
07/11/2025

I felt very taken care of by the doctor. It was a lovely experience.

Providence Patient
  • 5
07/08/2025

Jane Grumley is so professional, attentive, and present in a meeting regarding breast cancer. She made me comfortable in a very scary situation. I was referred by a former patient and now I know why.

Providence Patient
  • 5
06/27/2025

Love Dr. Grumley, she is one of the very few doctors that I trust wholeheartedly. When she come to see you, she doesn't need a computer to tell her what is going on with your body, she knows. SHE IS THE BEST!!!

Providence Patient