The Team


Mark Berenson, MD

House Call Physician & Medical Director

Dr. Mark Berenson is a board certified Family Physician and a native of New Orleans.  He earned a medical degree from Tulane University in 2003 and completed residency in 2006 at the UCSF Family Medicine Residency in Santa Rosa, California.  Immediately after residency, he took on the role as hospitalist and an emergency physician at several hospitals around the bay area and has also become a member of the UCSF Clinical Faculty as an instructor of Inpatient Medicine at San Francisco General Hospital.  In 2010, he joined Care Practice of San Francisco, providing acute and primary care in both the office and in-home setting.  Having worked for years in both the hospital and in-home setting, Dr. Berenson has learned to clearly distinguish the role for a hospital visit and the importance of staying in one’s home for medical care.

Dr. Berenson is known for being a thoughtful and thorough physician.  He places great value in one’s history as the key to the diagnosis which allows for the use of testing only when necessary.  He has an appreciation for homeostasis and the power of self healing. His practice targets the source of disease while promoting optimal nutrition, behavioral change, and self-motivated maneuvers to allow for the renewal of health. In addition to general acute care, other medical interests include treatment of opioid dependence, anxiety, and sleep disorders as well as nutritional counseling and second opinions on unrelenting medical mysteries. Dr. Berenson has vast knowledge of conventional medication and has years of experience in the use of complimentary and alternative remedies.  Whenever possible, he employs an integrative approach when working with his patients on a plan of care.  When not providing direct patient care, Dr. Berenson is particularly excited about the future of technology and it’s application in medicine.

In the twenty years since he began his career in medicine, Dr. Berenson has developed a simple perspective when caring for patients. His goal with each encounter is to provide a comfortable and open environment where patients become educated and empowered to reach their therapeutic goals.




Sarah Schwertner, MD

House Call Physician

Dr. Sarah Schwertner is a board certified Family Physician and has been an active member of the New Orleans community for the last 16 years. She earned her medical degree from the LSU School of Medicine in 2012 and went on to complete a year of General Surgery training with the LSU Department of Surgery.  This was followed by a year of Family Medicine with the LSU Department of Rural Family Medicine in Bogalusa, LA and two more years at the East Jefferson General Hospital Family Medicine Residency Program.

With her diverse training in surgery, family, and emergency medicine in both rural and urban settings, Dr. Schwertner has the knowledge and experience to determine the importance of delivering care in the home.  Dr. Schwertner holds a great deal of compassion for her patients and she is committed to knowing them physically, emotionally, and spiritually.  She enjoys long-standing relationships with her patients and gets to know them well.  This allows her to understand the root cause of one’s illness and to provide a unique plan of care tailored to the individual.  Her practice incorporates conventional as well as complimentary and alternative therapies when appropriate.  Dr. Schwertner’s breadth of experience gives her the confidence to treat the whole patient in the comfort of the home, workplace, or anywhere that is convenient.  She is excited to be a member of the NOLA Doc team of house call physicians and looks forward to keeping her patients safe and comfortable in their own environment.




Janis Aslett, RN

House Call Nurse

Janis Aslett, RN is a New Orleans native who earned her nursing degree from the Touro Infirmary School of Nursing. She obtained her Family Nurse Practitioner license with a concentration in Oncology from Tulane University School of Public Health and Tropical Medicine. Janis has worked at several prestigious institutions during her extensive nursing career including M.D. Anderson in Houston, Texas, Charity Hospital in New Orleans, and Ochsner Medical Center specializing in Hematology & Oncology. Prior to working with NOLA Doc, Janis was a Primary Care nurse with the Tulane University Student Health Center at the University’s uptown New Orleans campus. Janis is a proud member of the team of NOLA Doc clinicians and is happy to provide outstanding care while keeping her patients comfortable at home.


NOLA Doc continues to expand our team of healthcare professionals. We’re looking for motivated Nurses, Nurse Practitioners, EMTs, and Paramedics experienced in IV administration. If you have a positive attitude, enjoy meeting new people and not afraid to smile, consider joining our Mobile IV Therapy team. If interested, send us an email to