Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
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.
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.
Dr. De Silva is board certified in Internal Medicine and Bariatric Medicine and extensively trained and certified in Aesthetic Medicine and Federal Aviation Medicine. She attended Colombo Medical School in Sri Lanka, her country of origin, earning a degree in Medicine and Surgery with Honors. She did her residency training in both Internal Medicine and General Surgery at Columbia University College of Physicians and Surgeons in New York City. Following her residency, she worked in the Emergency Department at Valley Hospital in Ridgewood, New Jersey. In 1995, Dr. De Silva established De Silva Medical Inc., her current private practice for Internal Medicine in the Antelope Valley. She has professional training in the various fields of Aesthetic Medicine taught personally and certified by Dr. Zein Obagi, including The Concepts of Skin Health Care, Arque Derma, and The Artistic Restoration Lift. Dr. De Silva also has extensive training in Medical Weight Loss. Read more here.
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.
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.
“Dr Deepak Thiagarajan really cares about his patients. He listens and answers your concerns regarding your healthcare. He explains your diagnosis and gives the best health care recommendations to gain better health and to be healthier. I’m very fortunate to have found Dr Thiagarajan. His medical staff are outstanding and very professional.”
Dr. Deepak Thiagarajan, MD
Internist
7974 Haven Avenue,
Suite 210
Rancho Cucamonga, CA 91730
4.99(111)
5.0
(6)
Dr. Mohammed Ansari, MD
Internist 46.1 mi
5.0(6)
23120 Alicia Pkwy
Suite 216
Mission Viejo, CA 92692
Dr. Mohammed Ansari is board certified in Internal medicine and completed his residency from University of Missouri, Kansas city. He has also completed training in functional medicine from the institute of Functional Medicine (IFM), and has been trained in chronic infections from ILADS and is a Lyme literate MD. He is also very well versed in mold illness, heavy metal toxicity, environmental illnesses, hormonal imbalances just to name a few. He also considers Dr. Neil Nathan, who is one of the leading experts in environmental illnesses and mold toxicity as his mentor as he has learned from him and is also part of his mentorship program where they have group discussions on difficult cases.
Dr. Ansari’s interest in Integrative and functional medicine came from various different avenues. When he was working as assistant professor of medicine at the University of Kansas, teaching medical students and residents, he used to see the same patients in the hospital not improving on standard of care treatments and wondered about other aspects that were neglected. He then enrolled in the “Institute of functional medicine” which aligned with his philosophy of “treating the root cause of disease and not just treating the symptoms” and “using food, nutrition, lifestyle and supplements in addition to traditional medicine” to enhance the patient’s immune system and eliminate illness. One of the other inspirations to learn about environmental illness and mold toxicity also came to him when his whole family including himself were affected by mold illness from living in a moldy home.
He is naturally a very curious individual who is always eager to learn and in his free time goes through a lot of published research to get his answers as this is his passion. Although many times intuition is needed in treating patients, he believes there is a lot of research and evidence already out there which physicians and patients can benefit from and he regularly goes over interesting articles with his colleagues to see how to improve patient outcomes.
Dr. Ansari has extensive work experience, he has worked in acute patient care for Inpatient medicine and served as an Assistant professor in Internal Medicine at the University of Kansas Medical Center from 2016 to 2021 where he taught medical students and residents. He has also worked in an outpatient setting seeing patients for various illnesses including primary care from 2021 to 2024 before deciding to open his own practice.
Dr. Ansari has a special interest and training in treating allergies, reducing the effects of toxic chemicals, exercise physiology, nutrition, weight management, mold illness, heavy metal toxicity and Environmental medicine.
Dr. Ansari spends time with his family in his off time and enjoys reading English mysteries, science-fiction novels, reading research papers, flying radio-controlled aircraft, weight lifting and training martial arts (Jiu-Jitsu/Wrestling/Kickboxing).
“Great first appointment. Back in 30 days for a follow up. Thorough interview for new patients. It's been a while since I was able to spend more than a few minutes with a physician.”
Dr. Mohammed Ansari, MD
Internist
23120 Alicia Pkwy
Suite 216
Mission Viejo, CA 92692
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.
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.
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.
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.
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.
Brett Wertman, MD, FACC, is a triple board-certified cardiologist who is widely respected for his treatment and care for patients at Coastal Cardiology of Orange County in Ladera Ranch and Irvine, California.
Dr. Wertman, who twice has been named a Physician of Excellence by the Orange County Medical Association, also leads the Cardiac Rehabilitation Program at Hoag Hospital Irvine in Irvine.
An Orange County native, Dr. Wertman graduated summa cum laude and with Phi Beta Kappa Society honors in earning his Bachelor of Arts degrees in biochemistry and molecular, cellular, and developmental biology from the University of Colorado Boulder in Boulder, Colorado.
Dr. Wertman then completed his medical degree from the University of Washington in Seattle, Washington, and went on to finish his internship and residency training in internal medicine at Ronald Reagan UCLA Medical Center in Los Angeles, California.
He completed his fellowship training in cardiology and interventional cardiology at Cedars-Sinai Medical Center, also in Los Angeles.
Dr. Wertman has authored numerous publications in leading peer-reviewed journals and participated in live case transmissions to national meetings, demonstrating new techniques in the treatment of coronary artery disease and valvular heart disease.
Dr. Wertman is highly trained in the percutaneous treatment of valvular heart disease, including aortic valve replacement using the Edwards Sapien heart valve system, as well as mitral valve repair using the Abbott MitraClip™ system. He also has significant experience in other novel interventional therapies.
He looks forward to welcoming new patients and offering superior care to those returning to Coastal Cardiology of Orange County.
In Dr. Wertman’s spare time, he enjoys relaxing with his family, traveling, and exercising.
“Dr. Wertman is excellent. He is incredibly knowledgeable and very kind and considerate. I appreciate that he took the time to explain what he saw and answered all my questions. Crystal and Nicole were awesome. They are professional amd highly competent, and just as important, they made me feel right at ease, explaining everything we would be doing during the tests and why we're doing it. Dr. Wertman, Nicole and Crystal are highly skilled, personable and friendly. Thank you!”
Dr. Brett Wertman, MD
Internist
333 Corporate Drive
Suite 102
Ladera Ranch, CA 92694
4.89(377)
4.88
(236)
Dr. Huy Nguyen, MD
Cardiovascular Disease Physician 49.7 mi
4.88(236)
333 Corporate Drive
Suite 102
Ladera Ranch, CA 92694
Huy Nguyen, MD, FACC, a cardiologist at Coastal Cardiology of Orange County, has deep roots in Irvine, California, one of the communities the practice proudly serves, along with Ladera Ranch, California.
Dr. Nguyen grew up in Irvine and received his Bachelor of Arts in biology from the University of California, Irvine.
He then earned a master's in applied physiology and earned his medical degree from Chicago Medical School, one of the graduate schools of the Rosalind Franklin University of Medicine and Science in North Chicago, Illinois.
Back in Orange County, he completed his internship and residency in internal medicine, as well as his fellowship training in general cardiology, all at UC Irvine Medical Center in Orange, California.
He then moved to New York to complete his interventional cardiology fellowship at Mount Sinai Hospital in New York City, where he was awarded Outstanding Interventional Cardiology Fellow of the Year.
Throughout the course of his training, Dr. Nguyen has given numerous lectures and presentations, and has authored publications in peer-reviewed journals on various topics in both general and interventional cardiology.
He was involved with and participated in live case demonstrations at Mount Sinai Hospital, focusing on complex coronary interventions.
Dr. Nguyen believes in a patient-centric approach to cardiovascular care and focuses on the collaborative efforts with his patients in optimizing their outcomes.
In his spare time, Dr. Nguyen enjoys spending time with his family, watching movies, playing basketball, and surfing.
Teferi Mitiku, MD, FACC, is a board-certified cardiologist in Clinical Cardiac Electrophysiology and Cardiovascular Disease. He specializes in cardiac electrophysiology (EP) and provides the entire spectrum of arrhythmia treatments, including medical therapy, catheter ablation, and device-based therapy. Dr. Mitiku strives to provide compassionate care for his patients at Coastal Cardiology of Orange County in Irvine and Ladera Ranch, California.
Dr. Mitiku earned his Bachelor of Science in molecular cell and development biology from the University of California, Los Angeles (UCLA), graduating magna cum laude. He went on to attend the David Geffen School of Medicine at UCLA, receiving his Doctor of Medicine.
He then completed his internship and residency in internal medicine at Stanford University Hospital in Stanford, California, before completing cardiovascular medicine and electrophysiology fellowships at Yale New Haven Hospital in New Haven, Connecticut.
He previously served as the Director of Electrophysiology and an Assistant Professor of Medicine in the Division of Cardiology at the University of California, Irvine (UCI) School of Medicine and Wayne State University School of Medicine.
During his academic appointments, Dr. Mitiku enjoys teaching medical students, residents, and cardiology fellows. He was awarded Outstanding Teacher of The Year for three consecutive years and was granted entry into the Gold Humanism Honor Society.
Dr. Mitiku is affiliated with UCI Medical Center in Orange, California, and serves as the director of electrophysiology at Hoag Irvine Hospital in Irvine, California. At Hoag, He was awarded the top quality performer within the Cardiology peer group for 2019 and 2020. He is also a member of the American Heart Association, American College of Cardiology, and the American Medical Association.
He looks forward to welcoming new patients and providing excellent care for those continuing at Coastal Cardiology of Orange County.
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