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A triple diplomate of the American Board of Internal Medicine, Matthew Ostrom, MD, is board-certified in clinical cardiac electrophysiology, cardiovascular disease, nuclear cardiology, and internal medicine. Dr. Ostrom, who has more than 15 years of experience, serves the Los Angeles communities of Torrance and Redondo Beach, California, at COR Healthcare Medical Associates.

Born and raised in Seattle, Dr. Ostrom received his Bachelor of Science in microbiology from the University of Washington in 1999. Throughout his undergraduate studies, Dr. Ostrom was actively involved in cardiovascular research at the university and at the local biotechnology company ZymoGenetics, Inc.

Shortly after graduating, Dr. Ostrom began his medical studies at Loyola University Chicago Stritch School of Medicine. He completed an internal medicine internship and residency through the University of California, Los Angeles (UCLA) system. In addition, Dr. Ostrom pursued cardiology and electrophysiology fellowships at Harbor-UCLA Medical Center in West Carson, California, and at Kaiser Permanente Los Angeles Medical Center in Los Angeles. He is a fellow of the American College of Cardiology and the Heart Rhythm Society. 

Today, Dr. Ostrom is a practicing electrophysiologist, specializing in catheter and device-based therapies in the treatment of complex arrhythmias, syncope, sudden cardiac death, and heart failure.

His research interests include the ablation of complex arrhythmias and device-based treatments for sudden cardiac death and congestive heart failure. Dr. Ostrom has authored or co-authored numerous articles in peer-reviewed cardiology and electrophysiology journals.

In addition to his work at COR Healthcare Medical Associates, Dr. Ostrom is on staff at Providence Little Company of Mary Medical Center and Torrance Memorial Medical Center.

Away from work, Dr. Ostrom loves spending time outdoors with his wife and children.

As a triple diplomate with the American Board, Erol Kosar, MD, holds board certifications in clinical cardiac electrophysiology, cardiovascular diseases, and internal medicine. At COR Healthcare Medical Associates in Los Angeles, Dr. Kosar proudly brings his 30 years of experience to patients of all ages at the practice’s location in Torrance, California.

He is also certified by the International Board of Heart Rhythm Examiners (IBHRE). 

After earning his medical doctorate at Sidney Kimmel Medical College, Thomas Jefferson University, in Philadelphia in 1989, Dr. Kosar completed an internal medicine internship and residency at the University of Pittsburgh in 1992. He later received additional training through a cardiology and electrophysiology fellowship at the University of Southern California (USC) in Los Angeles. After completing his fellowship, Dr. Kosar served as a full-time assistant professor of medicine at USC.

Continuing education is a top priority for Dr. Kosar, who is a Western regional trainer for excimer laser lead extraction — developed by Spectranetics® — which uses laser technology to remove permanent pacemaker lead.

Dr. Kosar is highly trained in all aspects of cardiology and cardiac electrophysiology, but his special research interests include cardiac resynchronization, sudden cardiac arrest, lead extraction, and atrial fibrillation.

As a leader in his field, Dr. Kosar has authored numerous publications in Circulation, Journal of the American College of Cardiology, and Cardiac Electrophysiology Review.

Not only does Dr. Kosar work with patients at COR Healthcare Medical Associates in San Pedro, CA, but he is also on staff at Providence Little Company of Mary Medical Center in Torrance, and Torrance Memorial Medical Center

Parham Parto, MD, MPH, FACC, is an interventional cardiologist at Parto Heart & Vascular in Los Angeles and Newport Beach, California, providing care for patients throughout Southern California. Dr. Parto is board-certified in cardiovascular disease and internal medicine.

A Southern California native, Dr. Parto grew up in Irvine, attending the University of California, Irvine for his Bachelor of Science in biological sciences with a minor in educational studies. He then completed his Master of Public Health in health administration at Loma Linda University in Loma Linda, California.

After earning his Doctor of Medicine at St. George’s University School of Medicine in True Blue, Grenada, West Indies, Dr. Parto completed his internal medicine internship and residency program at the University of Texas Medical Branch in Galveston, Texas, rising to the top of his class and serving as chief resident.

Dr. Parto did his fellowship in cardiovascular disease at the Ochsner Clinic in New Orleans, Louisiana, training with the top experts in the field. 

He pursued further specialized training in interventional cardiology and peripheral vascular intervention at VCU School of Medicine in Richmond, Virginia. 

Currently, Dr. Parto is the Chief of Cardiology at St. Vincent Medical Center and the Director of Vascular Diseases at California Hospital Medical Center, both in Los Angeles. He has treated a wide range of cardiovascular conditions, won awards, and produced a number of publications. 

Dr. Parto is a well-recognized, highly skilled physician who’s committed to the health and recovery of his patients and well-liked for his compassionate bedside manner. 

Dr. Shaun Daneshrad, MD, FACC, is a leading internist and cardiologist in the Greater Los Angeles area, providing adults in and around Beverly Hills, CA, with skilled and compassionate care in all areas of internal medicine. With board certifications in both internal medicine and cardiology, Dr. Daneshrad provides care for medical issues in multiple areas, including diseases and conditions of the digestive tract, lungs and airways, blood disorders, cancer, and both chronic and acute diseases and conditions.

Dr. Daneshrad earned his bachelor's degree in microbiology at the University of California Los Angeles (UCLA) and his MD from the University of Pittsburgh School of Medicine. He completed his internship and residency in internal medicine at Loma Linda University before becoming an instructor at Riverside General Hospital, and soon after, completing a cardiology fellowship at Loma Linda University Medical Center and Loma Linda VA hospital.

After practicing in a group practice for several years, Dr. Daneshrad began his solo practice in the Los Angeles area where he enjoys being able to provide one-on-one personalized care for each individual patient.

As a double board-certified physician, Dr. Daneshrad has extensive experience in both internal medicine issues and cardiology. He maintains professional relationships with several area hospitals including Cedars-Sinai Medical Center and Olympia Medical Center, and has served as the clinical chief of cardiology at both Brotman Medical Center and Olympia Medical Center. He has been an active member of Cedars-Sinai's Performance Improvement Committee too.

At Cedars-Sinai, Dr. Daneshrad provides advanced cardiac care and intervention including treatments for atrial fibrillation, valve disorders and dysfunctions, mitral valve regurgitation, atrial septal defect and patent foramen ovale.

With an unflagging commitment to learning and implementing novel medical techniques and technology, Dr. Daneshrad has become known as a trusted provider of skilled, compassionate care for men and women in the Beverly Hills, CA area.

At Commons Clinic, Dr. Ortega offers personalized cardiology care to adults in Santa Monica, California. Our mission is to prevent, diagnose, and manage heart disease through tailored treatment plans that prioritize your health and well-being.

Led by Dr. Ortega, a board-certified cardiologist specializing in preventive cardiology, our practice combines advanced technology with a patient-centered approach to deliver exceptional care.

Dr. Ortega earned a Bachelor of Science in Neurobiology, Physiology, and Behavior, with a minor in Spanish, from the University of California, Davis. She went on to pursue her Doctor of Medicine at the Keck School of Medicine of USC in Los Angeles, California, and completed her internship and residency. She served as chief resident at USC during her internal medicine residency and as chief cardiology fellow at Harbor-UCLA. 

She is board-certified in internal medicine and cardiovascular disease, with additional certifications in adult echocardiography and cardiovascular computed tomography. Dr. Ortega is an active member of the Alpha Omega Alpha Honor Medical Society and a recipient of multiple honors, including Physician of the Year at Harbor-UCLA and the Excellence in Primary Care Award from LAC+USC.

The practice of Jenica L. Ortega, MD, offers a full range of diagnostic and preventive services, including ECG/EKG, echocardiography, Holter monitoring, cardiac stress testing, and nuclear stress testing, as well as advanced imaging with CT angiography and calcium scoring. Our specialized programs in atrial fibrillation management, hypertension, lipid disorders, and heart attack prevention help you work proactively toward lasting heart health.

Recognizing the underserved cardiovascular needs of women, we also provide dedicated women’s heart health targeting changes throughout a woman's life, with targeted cardiovascular care around pregnancy, post-partum, the menopause transition, and beyond. Additionally, our preoperative risk assessments and comprehensive wellness evaluations ensure you receive tailored guidance for your anticipated outcomes.

To schedule your next appointment with Dr. Ortega, please use our online scheduler or contact our friendly staff today.

Has a multicultural and comprehensive approach to his practice. • Received medical education at Sackler School of Medicine, Tel Aviv University, Israel. • Completed residency training at Cedars-Sinai Medical Center. • Additional training: Women’s Heart Disease and Heart Failure-Heart Transplant at Cedars-Sinai Heart Institute. • Successfully finished one of the busiest programs in the country in both Cardiovascular Disease and Interventional Cardiology specialties at Hofstra North Shore – LIJ School of Medicine, New York. Treating wide range of diseases: Arrhythmias, coronary artery disease, heart failure, hyperlipidemia, hypertension, peripheral vascular disease involving arterial and venous systems, valvular heart disease Special skills and interests in complex coronary and peripheral vascular interventions.

Sang Yong Ji, MD, is a board-certified adult cardiologist and cardiac electrophysiologist at COR Healthcare in Torrance, California. His board certification also includes internal medicine, nuclear cardiology, and echocardiography.

Dr. Ji was born in South Korea and moved to Paraguay during his junior high school year. He earned his medical degree from Asunción National University, Paraguay. He then moved to New York City to complete internal medicine residency and cardiology fellowship at Albert Einstein College of Medicine before completing a cardiac electrophysiology fellowship at Johns Hopkins Hospital in Baltimore, Maryland. He graduated as the Best Resident of the year and with Program director's award & Chief of Division award from internal medicine residency program and cardiology fellowship program respectively. He also served as chief fellow at both Montefiore cardiology fellowship program and Johns Hopkins University cardiac electrophysiology fellowship program. He provides state of the art care including complex ablations for different arrhythmias and implantation of cardiac electronic devices. He shares his expertise by authoring numerous publications in highly respected scientific and medical journals. He continues to stay active as current Principal Investigator in several clinical research projects at Torrance Memorial Medical Center as well.

Dr. Ji is fluent in English, Spanish, and Korean. When he’s not treating patients, Dr. Ji enjoys spending time with his wife, who is an internal medicine physician and their four children.

Brenton Bauer, MD, is a board-certified internist and cardiologist at COR Healthcare in Los Angeles. He sees patients at the Torrance, Redondo Beach and El Segundo offices in addition to the cardiology department at Torrance Memorial Medical Center.  He specializes in general cardiology, cardio-oncology, and advanced cardiac imaging.

Dr. Bauer completed his medical education and advanced training at the University of California, Los Angeles (UCLA). In addition to earning his Doctor of Medicine with honors, Dr. Bauer completed an internal medicine internship and residency, serving as chief resident, and a cardiovascular disease fellowship serving as chief fellow. He has been certified by the American Board of Internal Medicine in addition to subspecialty boards of Echocardiography, Cardiovascular CT, and Nuclear Cardiology. Dr. Bauer has written extensively for medical journals and other publications.

An award-winning physician, Dr. Bauer has been named to the American College of Cardiology’s (ACC) national conference program faculty, as an ACC National FIT (Fellows in Training) Jeopardy Competition finalist, as a finalist for the UCLA Most Outstanding Fellow Teaching Award, and won the best poster presentation in congenital heart disease at the American College of Cardiology’s 2015 conference, among others.

In his leisure time, Dr. Bauer loves traveling the world with his wife and junior high sweetheart.  They particularly enjoy experiencing different cultures, trying amazing food, and learning different languages (to which he is fluent in English and Spanish and working on others including Italian). 

Nadia Jafar Curran, MD, is a board-certified internist and cardiologist at COR Healthcare Medical Associates. She specializes in women’s cardiovascular disease, general cardiology, echocardiography, and nuclear cardiology.

Dr. Curran earned her medical degree from New York University School of Medicine, where she received the Gilda Lipton Memorial Award for compassionate care and was inducted into the Alpha Omega Alpha Honor Medical Society. She then moved to San Francisco to complete her internal medicine residency and cardiology fellowship at the University of California, San Francisco (UCSF). During her training, Dr. Curran developed a curriculum that focused on women’s heart disease while researching lifestyle interventions in postpartum women with pregnancy complications. This research resulted in multiple presentations and publications, and informed the most recent guidelines on adverse pregnancy outcomes and cardiovascular disease.

Dr. Curran is excited to join COR Healthcare Medical Associates and brings her expertise in the diagnosis and treatment of cardiovascular conditions, including risk factor assessment, prevention, microvascular dysfunction, coronary artery disease, spontaneous coronary artery dissection (SCAD), valvular heart disease, heart failure and cardiomyopathies, preconception counseling, and pregnancy-related heart health.

When she is not taking care of patients, Dr. Curran enjoys spending time with her husband and exploring all that the South Bay has to offer, including swimming, surfing, and great dining.

Eric Castleman, MD, is a board-certified cardiologist and internist at COR Healthcare Medical Associates in Los Angeles. He currently sees patients at the practice’s locations in Torrance and Redondo Beach, California, where he brings more than 35 years of experience specializing in general cardiology, and adult congenital heart disease.

Dr. Castleman earned his medical degree at Mount Sinai School of Medicine in New York City before moving to California for his medical training. He completed his internal medicine residency at the University of California, Los Angeles (UCLA) Medical Center and a cardiology fellowship from UC Irvine Medical Center in Orange, California.

Dr. Castleman has many interests outside of work. He loves spending time with his wife, who is a nurse, and their four children. He loves gardening, traveling, and tinkering in the garage repairing things.

Wilson Kwan, MD, MS, is a board-certified internist and cardiologist at COR Healthcare Medical Associates. He specializes in general cardiology and advanced imaging. 

Dr. Kwan earned his medical doctorate at the Keck School of Medicine of USC. He completed his internal medicine residency and cardiovascular disease fellowship at LAC+USC Medical Center / Keck Hospital of USC. 

He has been certified by the American Board of Internal Medicine and Cardiovascular Disease in addition to subspecialty boards of Echocardiography, Cardiovascular CT, Nuclear Cardiology, and Vascular Interpretation. Dr. Kwan has authored multiple peer-reviewed publications in medical and basic science journals as well as contributed to several book chapters. 

Dr. Kwan is fluent in English and Mandarin and proficient in conversational Spanish. 

A SoCal native, Dr. Kwan enjoys fishing, freediving, tennis, basketball, and gardening. He is also an avid traveler and aspiring home chef. 

Ankush Chhabra, MD, is a board-certified internist and cardiologist at COR Healthcare Medical Associates in Los Angeles. At the practice in Torrance and Manhattan Beach, California, he specializes in cardiovascular disease, nuclear cardiology, and peripheral vascular cardiology. 

Dr. Chhabra earned his medical degree at Vanderbilt University School of Medicine in Nashville, Tennessee, before moving to Michigan for his internal medicine residency, which he completed at the University of Michigan in Ann Arbor. Dr. Chhabra received advanced training at the University of California, Los Angeles (UCLA), completing a cardiology fellowship in 2004 and an interventional cardiology fellowship in 2005. Wanting to offer patients the highest level of care possible, Dr. Chhabra also completed a peripheral vascular fellowship through Harvard University at Massachusetts General Hospital in Boston in 2006.

Dr. Chhabra speaks English and Hindi.

When he’s not caring for patients at COR Healthcare Medical Associates, Dr. Chhabra enjoys reading about the history of the United States presidency, as well as traveling and playing tennis.