Meet Your MNP Diet Weight Loss Team

San Jose Physician Weight Loss Doctor Joseph Isaacson, MD, FACP, FACR
After earning his undergraduate and medical degrees at the University of Michigan, Dr. Isaacson received specialty training in Rheumatology, Allergy and Clinical Immunology at the University of California, Davis. Dr. Isaacson is certified by the American Boards of Internal Medicine, Rheumatology, and Allergy and Immunology. He is a Fellow of the American College of Physicians and Fellow of the American College of Rheumatology. In addition to his position as Medical Director of Metabolic Nutrition Program, Dr. Isaacson is Adjunct Associate Clinical Professor at the Stanford University School of Medicine, training future rheumatologists and immunologists. Dr. Isaacson enjoys exercising, diving, fly fishing, reading, and gardening.


In 2016, Dr. Isaacson validated his experience and passion for treating people with weight by becoming certified by the American Board of Obesity Medicine.

Los Gatos Physician Weight Loss Clinic Pat Kearney, RD, ACSM:CFI
Pat is a registered dietitian and certified fitness instructor at MNP.  She received her BS degree in Science and Nutrition from North Dakota State University and completed her internship at Stanford University Hospital and Clinics.  She is certified by the American College of Sports Medicine as a certified fitness instructor.  Recently, she was a director for a wellness program.  Her favorite pastimes are exercise, travel and healthy cooking.  She really enjoys helping people discover what works best for them as they strive to achieve a healthy weight and healthy life style.
Angi photo.1 Angi Dahl, MA, MFT

Angi is a trainer, coach, and licensed psychotherapist. She has a MA in Counseling Psychology from John F. Kennedy University and a BS degree in Organizational Behavior from the University of San Francisco. She has worked in medical, mental health, and corporate environments. For years she has assisted people in effectively working through challenging life experiences; helping them to increase their knowledge, skills, and strengths, as they pursue their most important goals. Angi likes nature hikes, bird watching, and kayaking. She especially enjoys helping people as they embark on their journey; taking steps to create more happiness, health and well being in their lives.

Denise A. Leffers, LMFT

Denise received her MA in Counseling Psychology from Santa Clara University and has been licensed since 1994. She has maintained a private practice since then and early in her career worked as a school psychotherapist for the Santa Clara Unified School District.  She facilitated groups at MNP for several years and left fourteen years ago to become Executive Director of the Teen and Family Counseling Center.  She is delighted to be back at MNP, helping individuals improve their physical and emotional health and make lifestyle changes that result in permanent weight loss. A strong believer in the necessity of a balanced life she believes this is accomplished with a healthy mind/body connection, which in turn increase one’s self esteem and facilitates the development of healthy, harmonious relationships. She is past President and past Director of Ethics for the Santa Clara Valley Chapter of the California Association of Marriage and Family Therapists.  Her private practice is located in Los Gatos, California.

We are a physician supervised weight loss program and medical diet program serving clients serious about losing weight and keeping it off in Northern California and the south San Francisco Bay Area, including San Jose, Los Gatos, Saratoga, Campbell, Cupertino, Santa Clara, Sunnyvale, Morgan Hill, Gilroy, Hollister, Mountain View, Los Altos, Palo Alto, Milpitas, Fremont, and Santa Cruz.