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

Board-certified cardiologist Ethan Yalvac, MD, FACC, FSCAI, RPVI, CBNC, is proud to provide comprehensive care to patients at Cardiology Specialists of Orange County in Santa Ana, Irvine, and Newport Beach, California.

Dr. Yalvac received his Bachelor of Arts in economics and math, graduating cum laude. He earned his Doctor of Medicine from the University of Texas Medical Branch School of Medicine in Galveston. He then completed his internship and residency in internal medicine at Tulane University in New Orleans, Louisiana. Afterward, Dr. Yalvac completed a general cardiology fellowship at the Tulane University Heart and Vascular Institute before completing an interventional cardiology fellowship at the University of California, San Diego. 

He holds certification from the Board of Nuclear Cardiology in advanced cardiac life support and is Level II trained in echocardiography. Dr. Yalvac is a member of the Society for Vascular Ultrasound, and a fellow of the American College of Cardiology and the Society for Cardiovascular Angiography and Interventions.

Dr. Yalvac is affiliated with Hoag Hospital and Hoag Vascular Institute in Newport Beach, Hoag Hospital & Orthopedic Institute in Irvine, St. Joseph Hospital in Orange, and Orange County Medical Center in Santa Ana, California.

Dr Khosla is a Board Certified Physician, he is also Board Certified by the American Board of Regenerative Medicine. He is fellowship trained in interventional pain management, functional & regenerative medicine. He provides an array of pain treatments such as platelet-rich plasma (PRP) regenerative therapies along with prolotherapy, epidurals, peripheral nerve blocks, joint injections, spinal cord stimulators, vertiflex interspinous spacer implants, percutaneous laser disc discectomy (LASE), and more. He serves both Northern and Southern California locations. 

RENEW by RJ is a leading regenerative medspa with offices in Temecula and Mission Viejo, California. Whether you're seeking body contouring, skin enhancement, or hair regrowth treatment, Richard Jin, MD, PhD, specializes in tailoring each service to your unique needs and aesthetic goals. 

The practice’s comprehensive services include advanced non-surgical cosmetic treatments, ensuring that you achieve the aesthetic results you desire while maintaining a natural appearance.

Addressing hair loss is a transformative journey, and at RENEW by RJ, Dr. Jin specializes in advanced hair restoration treatments. From cutting-edge hair transplant surgery to non-surgical approaches like platelet-rich plasma (PRP) therapy and laser therapy, their solutions are tailored to rejuvenate your hair and restore your confidence.

The practice is at the forefront of injectable treatments, offering a range of options such as Botox, Dysport, Xeomin, Juvederm, Restylane, and Sculptra. Whether you're aiming to smooth out wrinkles, restore facial volume, or enhance specific features, our experienced practitioners craft personalized treatment plans for optimal and natural-looking results.

For those seeking a nonsurgical facelift, the expertise extends to PDO thread lifts. Dr. Jin and the team utilize polydioxanone threads to lift and rejuvenate the skin, providing a refreshed appearance without the need for surgery.

Recognizing the importance of holistic well-being, RENEW by RJ also offers weight loss solutions. The team understands the unique challenges individuals face on their weight loss journeys and provides personalized guidance and support.

At RENEW by RJ, Dr. Jin and his staff go beyond traditional aesthetics, focusing on the individual needs of each patient. His commitment to excellence, innovation, and patient satisfaction sets the practice apart. 

Schedule a consultation today to experience the transformative care that defines RENEW by RJ—a place where beauty meets precision and well-being. Reach out online or by phone today. 

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. 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). 

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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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.

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.

At Advanced Cardiovascular Care, Inc., we believe the best heart health combines medical expertise, state of the art technology, and most importantly personalized, compassionate care.

With convenient locations, our staff serves the Inland Empire of Southern California including: San Bernadino, Redlands, Loma Linda, Banning, Beaumont, Riverside, Moreno Valley, Perris, Murrieta, Temecula, Corona, Norco, Eastvale, Lake Arrowhead, Big Bear, and Victorville.

Since 2005 our patients have enjoyed excellent heart and vascular care based on our philosophy of using the latest and most advanced medical knowledge and skill, technology, and genuine concern to help you enjoy life. Don't just live life, love it.

We provide individualized, personal care at its best

When it comes to your heart care, you want a practice that takes the time to get to know you better and make sure that you are completely comfortable with the care you receive. You need a cardiologist who along with his staff would not only provide you with the latest knowledge but also be adept with the most recent technical skills required to take the best care of you as an individual. Our cardiologists are energetic, passionate, and dedicated individuals who are also highly trained not only in the heart but also vascular diseases and interventions.

We have always practiced cardiology with one question in our minds … If we were the patient, how would we want to be treated? The answer is that we would want to be treated with personal, affectionate care, putting our needs first, offering us a healthy heart with a good quality of life. So that is how you can expect to be treated at our office. We love to interact with our patients and provide them with the compassionate and personalized care, individualized to their needs, for their most vital aspect of their lives: their heart.

Our Mission

To provide safe, high quality, personalized, compassionate and cost-effective healthcare services resulting in excellent patient outcomes

Our Vision

To be the leader in the community providing par excellence heart and vascular care to our patients utilizing evidence-based medicine and the latest fund of knowledge.

Our Values

• We strive to uphold an exceptional level of personalized service delivered with the utmost compassion and professionalism.
• We believe in an unwavering commitment to improving the treatment and lives of the patients we serve through the highest standards of clinical care.
• We believe in the empowerment of and investment in our employees to perform with absolute integrity, honesty, and reliability.

The office of Melanchton A. Mangoba, MD, offers comprehensive internal medicine services to the Riverside, California, community. The health care team specializes in diagnosing and treating a variety of acute and chronic diseases in adults. They also focus on preventive health services and annual wellness exams to reduce risk factors for long-term health complications through individually tailored Healthy Plans.

As a board-certified internal medicine physician, Dr. Mangoba provides primary care services to manage hypertension, renal failure, diabetes, and other chronic diseases. He and his team also focus on the specialized needs of geriatric patients. They diagnose and treat conditions like dementia with respect and dignity.

The office of Melanchton A. Mangoba, MD, has the latest diagnostic testing technologies to give patients answers to their health questions as soon as possible. The team takes a patient-focused approach to health care and provides preventive resources to support long-term health and wellness. Dr. Mangoba strives to provide the highest quality of patient care and enjoys building a strong foundation for patient-physician relationships.

If you’re looking for a compassionate internal medicine physician, schedule an evaluation online or by calling Melanchton A. Mangoba, MD, today.

Qais Ayouby, MD, is an accomplished internal medicine specialist practicing at Alertive Healthcare Medical Group in Riverside, California. At the practice, he provides patients with compassionate and effective care. 

Dr. Ayouby completed his medical degree with honors in 2016 and has since accrued more than seven years of diverse medical experience. He has an impressive track record in the field of internal medicine and is well-regarded among his peers and patients alike. 

Dr. Ayouby is affiliated with several hospitals in the region, including Corona Regional Medical Center and Temecula Valley Hospital in California. He also collaborates with many other doctors and specialists in various medical groups, demonstrating his commitment to providing comprehensive patient care. 

In addition to his professional achievements, Dr. Ayouby enjoys spending his free time reading and being with his family. He recently became a father to a little girl, which has brought him immeasurable joy and fulfillment. 

Dr. Ayouby's patients appreciate his compassionate approach and ability to build strong, trusting relationships. He is dedicated to staying up-to-date with the latest advancements in internal medicine and actively seeks new professional development opportunities. Dr. Ayouby is skilled, respected, and committed to delivering the highest quality care to his patients. 

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.

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.