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WELCOME | 7/3/2008
Good Afternoon!

John Shieh, MD
Hometown: Houston, Texas
Undergraduate: University of Texas, Austin
Medical School: University of Texas Medical Branch, Galveston
Residency: White Memorial Medical Center, Los Angeles
Medical Interests: Anti-aging medicine, preventive medicine, aesthetic medicine
Affiliations: American Academy of Family Physicians
American Society for Laser Medicine and Surgery
American Society of Aesthetics and Mesotherapy
American Academy of Anti-Aging Medicine
“Best Doctors” L.A. Downtown News
Hobbies: music, piano, acting, dance, photography, scuba diving, classic cars and restoration
Dr. Shieh is one of the founding members of Modern Concepts Medical Group and has been providing care for the Los Angeles community for the past 8 years. His personal and caring approach to his patients earned him the distinction of “Best Doctors” by the Los Angeles Downtown News in 2002. Dr. Shieh’s focus is on the enhancement of his patients’ health and wellness in order to prevent disease and illness. Dr. Shieh was one of the first doctors in Los Angeles to perform “Lipo-Dissolve” mesotherapy to melt away fat, and one of the very first to perform the Fotofacial RF skin rejuvenation treatment. As a leading doctor in this field, he has also become an FDA investigator for upcoming new treatments such as the VelaSmooth, a radiofrequency and infrared device for cellulite and fat reduction.
Violkys Bustamante, PA-C
Hometown: Las Vegas, Nevada
Undergraduate: University of Southern California-Bachelor of Science
Medical School: University of Texas Medical Branch, Galveston
Physician Assistant Program: USC-PA Program "Family Practice"
Medical Interests: women's health, preventive medicine, emergency medicine, ophthalmology and alternative medical treatments.
Affiliations: 1) The National Commission of Physician Assistants.
2) California Association of Physician Assistants.
3) Joint Commission Allied Health Personnel Ophthalmology.
4) Walk with Sally, Medical Director(non-profit organization)
Hobbies: World Traveling, Poetry writing, Running, Wine tasting, acting, and dancing.
Ms Bustamante is one of the co-founding members of Modern Concepts Medical Group and has been serving the Los Angeles Community for the past nine years. As a family practitioner, she believes the first step in providing excellent care is to listen, have compassion and encourage communication with her patients. Ms Bustamante has extensive experience in women's health, emergency medicine and ophthalmology. She is also the Medical Director for Walk With Sally, a non-profit organization that provides mentoring support programs to children of parents with cancer-one child at a time, one heart at a time.
Roberto Madrid, MD, MBA
Hometown: Los Angeles, Ca.
Undergraduate: UCLA
Medical School: Drew/UCLA
Residency: White Memorial Medical Center, Los Angeles
Medical Interests: Family Practice
Affiliations: American Academy of Family Practice, National Society of Hispanic MBA’s, Pepperdine University Hispanic Advisory Council, Drew/ UCLA Admissions Committee
Hobbies: Basketball, traveling, digital photography, mountain biking, hiking
Dr. Madrid has been providing care to the Los Angeles community with Modern Concepts since 1998. Through out his medical career he has been involved in various community projects ranging from scholarship foundations for low income students to medical missionary work in Latin America. He believes strongly that providing care to a community means caring about the community on various levels. He is committed to the health of his patients and the health of his community.
Margaret Herrera, MD
Hometown: South El Monte
Undergraduate: Cal poly Pomona
Medical School: UCLA
Residency: White Memorial Medical Center
Medical Interests: Women’s health, Family Practice
Affiliations: Medical Director of Cal State LA Nurse Practitioner Program
Hobbies: Reading, Travel
Dr. Herrera has been with Modern Concepts Medical Group for the last 8 yrs. In addition to practicing family medicine for the Los Angeles communities, she also enjoys teaching students. Her teaching includes educating elementary school children about health and science in El Monte, also training and preparing student nurse practitioners in the practice of medicine. She is currently the Medical Director for Cal State LA’s Nurse Practitioner program. Dr. Herrera has a special interest in women’s health, but provides care to all age groups. “I believe listening and providing care that promotes the patient involvement has been the most effective way to practice medicine.”
Oscar Escobar, PA-C
Hometown: El Salvador
Undergraduate: B.S., Cal State Dominguez
Graduate School: M.B.A., Cal State Dominguez
Medical Education: USC School of Medicine
Medical Interests: The health concerns of his patients.
Affiliations: Medical Director of Cal State LA Nurse Practitioner Program
Hobbies: Reading, Travel
Mr. Escobar is fluent in Spanish. He explores and pursues other interests outside of practice, enjoying reading, exercising and photography.
Gustavo Calleros, MD
Hometown: Los Angeles, CA
Undergraduate: UC Berkeley
Medical School: UC Irvine, CA
Residency: White Memorial
Medical Interests: Believes that his main goal as a doctor is to serve the community and his patients through warmth, compassion and humor.
Affiliations: American Medical Association
Hobbies: He has an interest in community service and is actively involved in recruitment of minority students to medical school and public speaking.
“Serving my community and serving my patients through warmth, humor and compassion has always been by main goal”
Gabriel Lopez, MD
Hometown: Los Angeles, CA
Undergraduate: University of California, Los Angeles
Medical School: University of California, Los Angeles
Residency: Family Practice, White Memorial Medical Center
Medical Interests: Office based medical procedures and surgery
Affiliations: American Medical Association
Hobbies: Playing sports, reading, watching movies, listening to music.
Kevin Jorgensen, PA-C
Hometown: Huntington Beach
Undergraduate: University of Southern California
Medical School: USC School of Medicine
Graduate School: Western State University College of Law
Medical Interests: Family Practice, Natural Hormone Replacement Therapy, Orthopedic Medicine.
Affiliations: The National Commission of Physician Assistants, California Association of Physician Assistants, American Bar Association
Hobbies: Boating, Scuba diving, Saltwater fishing, computers, Ice Hockey
Mr. Jorgensen is one of the founding members of Modern Concepts Medical Group and has been providing care for the Montebello community since 1996. He believes in creating an interactive relationship with his patients which involves getting to know the whole family, understanding individual social issues, and making the patient feel welcome at the office. Mr. Jorgensen strives to achieve these goals is a humorous and compassionate manner.