LOCAL HEALTHCARE PROVIDERS
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Availability last updated 08/21/2026
Su Clinica Medical Group is a bilingual primary, general, and chronic care management practice in San Bernardino, California. Opened in 2006, Jose de la Llana, MD, and the team provide compassionate and accessible medical care to adults 18 and over.
The primary care practice diagnoses, treats, and monitors medical issues. The team performs physicals to assess general health and manages infections like the cold and flu. The general practice also performs earwax removal, a unique and practical service not available at most clinics in the area.
Su Clinica Medical Group sees adults of all ages but specializes in managing the health needs of older adults and seniors. The team provides expert chronic disease management for English- and Spanish-speaking patients with conditions like diabetes, high blood pressure, heart disease, and cancer.
The in-office lab features a hemoglobin A1C (A1C) machine and prep test for diabetes that provides immediate results. Su Clinica Medical Group is the only medical clinic in the area with this machine.
Dr. de la Llana is a graduate of Cebu Doctors’ University in Mandaue, Philippines, specializing in general and preventive medicine. He is a kind and knowledgeable physician with a compassionate demeanor. At Su Clinica Medical Group, he’s dedicated to making health services more accessible so he can better serve the diverse community.
Su Clinica Medical Group offers services for private pay patients as well as those with Medicare, Medicare Advantage, Covered California™, and most PPO (preferred provider organization) health insurance plans. Walk-in and same-day appointments are available, primarily for private pay patients and as needed.
The team at Su Clinica Medical Group works alongside their patients, helping them maintain and improve health at every stage of life. The patient-centered physicians provide health services in a friendly and relaxed environment.
Call Su Clinica Medical Group today or use the online booking button to schedule an appointment.
Dr. Jose De La Llana, MD
General Practice Physician
850 W Highland Ave
Suite A
San Bernardino, CA 92405
Nikita Gore, MD
Family Physician
15708 Pomerado Rd
Ste N201
Poway, CA 92064
Dr. Kathy Zelken is returning as an aesthetic medicine provider after a hiatus since the birth of her daughters. She has served as the medical advisor of the Zelken Institute for Aesthetic Medicine since it was established in 2016. She has worked tirelessly in the background to ensure the highest level of excellence and quality in all aspects of patient care. She has had a keen eye for artistry since childhood, starting from being a classically trained artist. She graduated summa cum laude from the University of California Berkeley with a major in Molecular and Cell Biology and a minor in Art History. During medical school at the University of Texas Southwestern, she published papers with world-renowned plastic surgeon and former editor-in-chief of Plastic and Reconstructive Surgery journal (the top journal in the field), Dr. Rod Rohrich. Her meticulous nature, extraordinary calmness, and friendly demeanor gained from close to a decade of working as a board-certified pediatrician in Orange County and doing some of the most delicate procedures on tiny babies will put the most anxious patients at ease. She is thrilled to help patients map out a comprehensive treatment plan to achieve their individual aesthetic goals and explain various nonsurgical procedures in detail. Her patients love her and seek her out for neuromodulator and facial contouring injections, skin rejuvenation, laser treatments, and so much more.
Kathy Zelken, MD
Pediatrician
3440 Irvine Ave
Newport Beach, CA 92660
Dr. Kenna Schnarr is dual-boarded in Obstetrics and Gynecology and Family Medicine, bringing a comprehensive, patient-centered approach to women’s health. Originally from a small town with very few doctors, Dr. Schnarr values strong patient relationships and continuity of care. With training across both primary care and women’s health, Dr. Schnarr is committed to delivering comprehensive, holistic care to women at every stage of life — what she describes as “womb to tomb.”
She earned her medical degree with clinical honors from Kansas City University of Medicine and Biosciences, where she also completed a fellowship teaching anatomy and pathology to medical students alongside continuing breast cancer research. Prior to medical school, she earned a Master’s in stem cell and cancer biology, with research focused on using stem cells to treat triple negative breast cancer. Dr. Schnarr has authored multiple peer-reviewed publications and is passionate about mentoring, medical education, and interdisciplinary collaboration. Outside of medicine, she enjoys fitness, culinary exploration, international travel, and spending time with her spouse, family, and friends.
Kenna Schnarr, DO, MS
OB-GYN
351 Hospital Road
Suite 316
Newport Beach, CA 92663
Dr. Patricia Guevara-Channell, MD
Family Physician
8008 Haven Ave Ste 100
Suite 100
Rancho Cucamonga, CA 91730
Dr. Samantha Von Ins
Family Physician
300 E Yorba Linda Blvd
Suite B
Placentia, CA 92870
Ronald Cohen, MD, is a board-certified specialist in both Family and Sports Medicine. Dr. Cohen is in the top 1% of America’s doctors when it comes to experience and training in regenerative orthopedic treatments – nonsurgical solutions to improve function and reduce pain. At Coastal Regenerative Orthopedics & Wellness Center, he is proud to use his expertise to care for patients throughout San Diego, California.
For the first 11 years of his medical career, Dr. Cohen was contracted by the Department of Defense to manage and direct the Sports Medicine & Reconditioning program for all of the Marine Corps recruits in the western United States as well as to serve as a special consultant for the Navy SEALs.
He has had extensive experience and training in managing difficult injuries and chronic conditions and has been a licensed Regenexx® affiliate since undergoing advanced regenerative orthopedics training with the Regenexx founders in 2013. As the leading Regenexx provider in San Diego, Dr. Cohen is excited to provide the Advanced Regenexx Procedures to patients throughout the community.
Dr. Cohen has had a distinguished career in medicine and has been recognized by his peers as an outstanding clinician, winning several renowned awards, including the prestigious Master Clinician award as well as being appointed as Assistant Clinical Professor (voluntary) at UCSD School of Medicine.
Dr. Cohen is a dedicated physician and passionate family man who is also an avid golfer, fisherman, and triathlete.
Ronald Cohen, MD
Family Physician
11230 Sorrento Valley Rd
Suite 120
San Diego, CA 92121
Dr. Yeyong Shin, DO
Family Physician
1111 Grand Ave.
Suite J
Diamond Bar, CA 91765
