Find a Top Internist Near Me in Rancho Cucamonga, CA – Book an Appointment Instantly

Dr. Daniel Brelian is a gastroenterologist at Downtown Gastro Medical Group in Los Angeles. He is board-certified in Internal Medicine and Gastroenterology, and is passionate about helping patients recover from a wide range of digestive ailments and conditions.

Dr. Brelian received his bachelor’s degree in Molecular and Cell Biology from the University of California, Berkeley and went on to earn his Doctor of Medicine at Drexel University College of Medicine in Philadelphia.

He has worked in some of the most innovative and prestigious medical centers in the nation, including Cedars-Sinai Medical Center, Georgetown University Hospital, and New York University. Before opening his private practice, he was a physician at the Pacific Alliance Medical Group.

Dr. Brelian’s work has appeared in numerous medical journals, including Gastroenterology and Gastrointestinal Endoscopy. Committed to the latest research and training, he is also a member of many professional organizations, including the American College of Gastroenterology (ACG) and the American Gastroenterological Association (AGA).

At Downtown Gastro Medical Group, Dr. Brelian helps patients recover from conditions like irritable bowel syndrome, food allergies, acid reflux disease, Crohn's disease, and more. With a commitment to the most excellent quality of patient care, his patients feel supported and empowered to live their healthiest lives.

BA in Biology UC Santa Barbara 1994 MD St George's University, Grenada 2001 Residency at Alameda County Medical Center, Oakland CA 2001-2004 Hospitalist physician South Orange County CA 2004- 2024 Board certification in Internal Medicine 2004 Board certification in Hospice & Palliative Care medicine 2012 Sub-investigator & Principal investigator in numerous research-based clinical trials 2008-2024 Independent Physician consultant 2024-present, Expert witness review Lead physician for Gapcare RPM hypertention clinic 2024-2025 Longevity physician 2024-present

LAGUNA BEACH AESTHETICS

 

Adrienne O’Connell, DO, is a native to the San Francisco Bay area and an expert aesthetic and wellness specialist at Laguna Beach Aesthetics, an aesthetics and wellness clinic in the heart of Laguna Beach, California.   

Dr. O’Connell also has advanced training certificates in Aesthetic procedures including PRP for the “Vampire Facelift” and hair rejuvenation. She gained advanced skill in Botox, Dermal Fillers, chemical peels, sclerotherapy, skin rejuvenation and resurfacing with CO2 lasers and light therapy, microneedling and PRP – platelet rich plasma.  

At Laguna Beach Aesthetics, Cosmetic Dermatology and Laser Center, you will meet with Dr. O’Connell herself for a consultation and all procedures are performed by her.  Each visit and procedure are tailored to you specifically by Dr. O’Connell.

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Kanagaratnam Sivalingam, MD, FACP, is a skilled internist at First Valley Medical Group in Lancaster, California. He has more than 40 years of experience in treating numerous acute and chronic conditions. Dr. Sivalingam spends time with patients and listens to their concerns, giving them a voice in their treatment.

Dr. Sivalingam earned his medical degree from the University of Ceylon Medical School in Peradeniya, Sri Lanka. He completed his internal medicine training at the Hospital for Joint Diseases in New York City and his residency at Vembadi Polyclinic in Ceylon, Sri Lanka.

He maintains his advanced credentials with continuing education. Dr. Sivalingam is board certified in internal medicine and licensed in the state of California. He’s a fellow of the American College of Physicians and a member of the American Medical Association, American Society of Echocardiography, American Academy of Anti-Aging Medicine, and numerous other professional organizations.

At First Valley Medical Group, Dr. Sivalingam provides premium care for patients with a variety of chronic diseases using a compassionate bedside manner. He uses the most innovative technology and procedures to provide expert treatments.

Dr. Sivalingam evaluates each patient as a whole person and offers conservative treatments whenever possible. He and his team warmly welcome patients to First Valley Medical Group and look forward to serving them.

Kelly Okray, PA-C has been with First Valley Medical Group since July 2022. First Valley Medical Group is an internal medicine outpatient clinic with multiple locations. Kelly works at our Lancaster location off of Lancaster Boulevard and 10 th street. She can help diagnose and manage various conditions including hypertension, diabetes, thyroid conditions, heart failure and many others. Kelly can help you understand your conditions, lab work and images, and get you connected with a specialist as needed. She is also able to provide basic preventative women’s health care. She is passionate about preventative medicine through diet and lifestyle changes and would love to help you get and stay healthy. She is originally from Minnesota, relocating nearly two and a half years ago and is making Lancaster her

Dr. Barry Buffman has been practicing since 1980 in internal medicine with a specialty in urology. He graduated from the Rush Medical College in Chicago, IL and practices with a focus on a multitude of urological issues, such as sexual dysfunction, bladder, and prostate conditions. In addition, Dr. Buffman is involved with medical research for various urological conditions. In his spare time Dr. Buffman has a passion for teleplay/screenplay, musical composition, guitar, and piano.

About Prestige Medicine

Prestige Med offers the latest in aesthetics and anti-aging, for San Ramon, San Jose, and San Juan Capistrano, CA. We provide safe and effective treatments using the latest technology, with limited downtime.

Dr. Mardanzai's background consists of over 20 years as a procedurist in various settings. Most notably, he has worked in wound care specialty as the previous Medical Director of the San Ramon Regional Multispecialty Advanced Wound Center, before pursuing a fellowship in facial aesthetics. He is dual board-certified with ABIM and the American Aesthetic Association.

Our mission is to rejuvenate every patient, and help them reach their most youthful and vibrant self. Your care will be provided by our expert physician and our master nurse injector. Our services range from minimally invasive to more vigorous procedures, and are designed to help you feel and look your best.

Call us to make an appointment!

 

Janne Huynh Dewing, MD, is a board-certified physician with over 20 years of experience providing high quality, personalized patient care. Specializing in internal medicine at her Laguna Beach, California, private practice, Dr. Janne has experience preventing, diagnosing, and treating a wide range of acute and chronic conditions. She helps patients address their medical risks and concerns, and take steps towards improving their overall health. 

Dr. Janne completed her undergraduate studies at Cornell University in Ithaca, New York. She then went on to the University of California, Los Angeles (UCLA) School of Medicine, earning her Doctor of Medicine. After completing her education, Dr. Janne began her medical training at New York-Presbyterian Hospital in New York, where she completed both her internship and residency. 

Dr. Janne has held positions in both patient care and education. After her residency, she held the position of assistant professor of clinical medicine at the Albert Einstein College of Medicine in the Bronx, New York, where she was responsible for teaching evidence-based medicine to more than 70 medical students, interns, and physicians. She also served as an attending physician at Jack D. Weiler Hospital, also in the Bronx. 

As an internist, Dr. Janne helps adults address the full spectrum of their health care needs. She provides personalized health care solutions, including physician grade supplements through Metagenics® and Xymogen®, and specializes in several innovative treatment methods, including hormone replacement therapy and personalized weight loss programs. She also provides several gentle and effective aesthetic solutions like chemical peels, Botox®, and TempSure® Envi.

Dr. Janne’s office has a convenient location on the South Coast Medical Center campus. To schedule your visit, call or use the online booking tool.

Grace Wong, MD, is a highly skilled internist with a strong background in medicine. Dr. Wong serves men and women of all adult ages in Burbank, California. Her dedication to patient education, holistic approach, and deeply personable nature are just some of the reasons so many entrust her with their care.

Dr. Wong is passionate about her services in overall health and wellness. She believes there is a great deal of truth in the old adage that looking your best translates to feeling your best. To that end, Dr. Wong offers the latest aesthetic treatments and is always researching new options to include at her practice.

Education has always been an important part of Dr. Wong’s life. She completed her medical degree with a focus on internal medicine. Now in practice for more than a decade, Dr. Wong continues to seek out continuing education opportunities to further expand her skills and knowledge.  

Wellness also plays a central role in Dr. Wong’s practice. In addition to medical care, she provides top-quality wellness care, women’s health services to women of all ages, bio-identical hormone therapy, and aesthetic medicine. Dr. Wong is proud to introduce stress management and life coaching in her practice.  Life coach and stress reduction therapy are now available. Dr. Wong and her life coach associate take great pride in their ability to assist patients through tumultuous and challenging times in their lives.

Dr. Wong is assisted by an excellent support staff who share her commitment to achieving the very best in patient care. From the time you book your initial appointment through your treatment and beyond, you can rest assured you’re in capable and caring hands.

If you’re searching for the best, personable medical care, bio-identical hormone therapy, latest aesthetic services delivered by medical professionals, or seek to reduce stress and maximize your true potential, schedule a visit with Dr. Wong today. You can book a visit at her Burbank, California, practice online or call to check availability.

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Rahul Gaglani, MD, is a board-certified interventional and general cardiologist serving patients at Core Cardiology in Murrieta and Temecula, California. He specializes in percutaneous interventions of the coronary arteries (radial approach) and structural heart disease intervention (atrial septal defects, patent foramen ovale, aortic stenosis, and hypertrophic cardiomyopathy). 

Dr. Gaglani graduated from the Rutgers School of Environmental and Biological Sciences in New Brunswick, New Jersey, with a Bachelor of Science in biochemistry with a concentration in economics. He then earned his Doctor of Medicine from Ross University School of Medicine. Upon graduating, he completed his internal medicine residency at Saint Vincent Catholic Medical Center and his fellowships in general and interventional cardiology at NewYork-Presbyterian Brooklyn Methodist Hospital, both in New York City. Prior to establishing his private practice, he worked at various medical centers in New York and California. 

He established his private practice in 2017, where he provides a wide range of treatments for cardiovascular disease, arrhythmias, heart failure, peripheral artery disease, and venous disease. He also offers coronary artery intervention and structural heart intervention, as well as heart disease prevention services.

Dr. Gaglani is board certified in interventional/general cardiology, echocardiography, cardiac nuclear medicine, and vascular imaging. His expertise in vascular disease also allows him to treat peripheral arterial/venous disease, including non-healing ulcers and wounds of the lower extremities, as well as stenosis of the carotid vessels, radial approach angiography, structural heart disease, high-risk PCI, and vein ablations.

To schedule an appointment at the office of Rahul Gaglani, MD, call the office or book a consultation online.

Meet Elie Ghasb, M.D. Dr. Elie Ghasb is a dedicated Internal Medicine physician committed to providing compassionate, patient-centered care to our community. He graduated from the University of California, Riverside School of Medicine, and completed his training at Riverside University Health System, where he honed his clinical expertise and passion for improving community health. Dr. Ghasb brings a holistic approach to medicine, emphasizing healthy habits, active listening, and personalized treatment plans. His care philosophy centers around treating each patient as a whole person, not just addressing symptoms. Dr. Ghasb's research contributions, volunteer work at free clinics, and mentorship of medical students underscore his dedication to advancing healthcare and fostering trust with his patients. As a physician deeply rooted in the community, he is committed to building lasting relationships with his patients and their families.

After many years of medical practice, my patients have taught me a great deal about what they desire and expect from their primary care physician. I take great pride in practicing in a comfortable, clean, private, state-of-the-art medical office. We are open-minded, empathetic, focused on preventive care and are willing to combine traditional Western medicine with selected alternative therapies to meet our patients needs.

Youram Nassir, MD, is a world-renowned hematologist and oncologist serving patients at Cancer Care Institute in the Mid-Wilshire district of Los Angeles, California. With 22 years in practice, Dr. Nassir applies his unrivaled understanding of cancer care to the effective treatment of brain, lung, liver, pancreas, prostate, ovarian, breast, leukemia, multiple myeloma, colon, stomach, head and neck cancer, and lymphoma. His multidisciplinary, collaborative approach and persistence have helped save countless lives over the last two decades, winning him recognition within his community and the medical field.

Many people discover their passion later in life, but Dr. Nassir has always been firmly devoted to the science of healing. From the early age of fourteen, he knew he would pursue a career in the medical field. 

His formal post-secondary education began in Canada at the University of Toronto. After completing two years of undergraduate studies, he moved to the United States to finish his degree at UCLA, one of California’s top research institutions. Dr. Nassir’s time at the University of California, Los Angeles, was integral in his future success as an esteemed physician. His passion for the healing arts fueled his studies, earning him acclaim among his peers and educators.

By the time Dr. Nassir graduated magna cum laude from UCLA in 1992, he was well-traveled, steeped in the knowledge of medical research, and eager to continue pursuing his passion for healing. Upon completing his undergraduate studies at UCLA, Dr. Nassir enrolled at the prestigious Cornell University Medical College in New York, one of the country’s most renowned medical schools. Here, he received the highly respected American Foundation for Urological Disease Research Scholarship for his outstanding performance in the program.

Dr. Nassir’s academic career at Cornell University was reaching new horizons when his father was diagnosed with terminal stage 4 prostate cancer. To be near his family during his father’s final months, Dr. Nassir made the difficult decision to transfer his medical schooling to UCLA. As he supported his father through his cancer treatment, he witnessed the vital role that oncologists play in the lives of cancer patients and their families. Through this pivotal, first-hand experience, Dr. Nassir realized his calling in the field of oncology.

After receiving his Doctor of Medicine from the UCLA School of Medicine in 1996, Dr. Nassir continued his medical training as an intern and resident for the next three years at UCLA Medical Center. In 1999, he chose to attend USC Medical Center and Norris Cancer Center as a hematology and oncology fellow, where he completed his hematology/oncology fellowship under the guidance of world-class mentors in both fields.

Dr. Nassir has been in practice for more than twenty years. He currently practices at his private practice, Cancer Care Institute, and is independently affiliated with Cedars-Sinai Medical Center. His success in his field can be attributed not only to his exceptional medical training and unshaken persistence but also to a deep and personal understanding of cancer and patient care.

Dr. Nassir understands that there is no such thing as “standard cancer,” so there shouldn’t be a standard approach to treating the disease. Instead, he takes a highly individualized, collaborative approach to patient care, offering novel therapies that are uniquely suited to your needs and circumstances. 

As cancer is a chronic disease, Dr. Nassir provides long-term care to help ensure the most positive possible outcomes. He has a unique understanding of the disease and stays with you and your family every step of the way, offering therapies, treatments, and dietary advice to help you make guided, well-informed decisions about your care. 

Today, Dr. Nassir’s reputation is widely celebrated in his community. Ratings from his patients and their families consistently spotlight his expertise and unyielding, compassionate approach. He is known as a gifted doctor and a compassionate man who strives daily to deliver hope and save lives.

In regard to his life mission and work, Dr. Nassir notes, “My hope is to continue to improve the quality of life for cancer patients, to turn incurable cancer from a death sentence into a chronic, manageable disease where people can live much longer and have satisfying lives.” Dr. Nassir is fortunate and humbled to have the opportunity to bring hope to cancer patients through individualized care and targeted cancer therapies.

Steven Kamara is a diligent and compassionate physician specializing in internal medicine. Dr. Kamara speaks English, Spanish, Hebrew, Farsi, and Arabic fluently. He attended the Albert Einstein College of Medicine to receive his medical degree and completed his postdoctoral education at the Cedars Sinai Medical Center in Los Angeles.

Dr. Kamara treats patients at his private practice in Los Angeles and also takes care of patients in the hospital at Cedars Sinai Medical Center and Olympia Hospital. He is a Medical Director at nursing facilities and also takes care of patients at the nursing home.