Stephen S. Ehrlich, M.D., F.A.C.C.
Cardiology and Clinical Cardiac Electrophysiology

Dr. Ehrlich founded Coastal Cardiology of Orange County at the end of 2009. He began his career in Los Angeles at the Hospital of the Good Samaritan, where he helped to develop the ablation program. After three years in Los Angeles, Dr. Ehrlich relocated to South Orange County. He spent 17 years working at Mission Internal Medical Group. While there, he developed the modern electrophysiology programs at both Saddleback and Mission Hospitals. During his professional career in South County, Dr. Ehrlich helped pioneer the development of electrophysiology in the area. He was the first in the county to implant a defibrillator without the assistance of a cardiac surgeon, the first in the county to perform atrial fibrillation ablations, and the first to help construct a dedicated Electrophysiology Laboratory. 

Dr. Ehrlich received his undergraduate degree in Biochemistry at UCLA, his medical training at the University of Vermont, his residency training at USC, and his fellowship in cardiology at UCI. He continues to be active in clinical research. He has served as the Director of Electrophysiology Services at Mission Hospital and has been named a Physician of Excellence by the Orange County Medical Association for the past five years.


  • Board Certified, Clinical Cardiac Electrophysiology
  • Board Certified, Cardiology
  • Board Certified, Internal Medicine

Degrees and Training:

  • Fellowship in Clinical Cardiac Electrophysiology, Hospital of the Good Samaritan, Los Angeles, CA.
  • Fellowship in Cardiology, University of California, Irvine.
  • Residency in Internal Medicine, University of Southern California.
  • Medical Degree, University of Vermont.
  • Bachelor of Science in Biochemistry, University of California Los Angeles.

Brett M. Wertman, M.D., F.A.C.C.
Cardiology and Interventional Cardiology

A native of Orange County, Dr. Wertman graduated Summa Cum Laude and Phi Beta Kappa with Bachelor of Arts degrees in Biochemistry as well as Molecular, Cellular, and Developmental Biology from the University of Colorado, Boulder. He then traveled to the Pacific Northwest and earned his medical degree from the University of Washington in Seattle. He went on to complete his internship and residency training in Internal Medicine at UCLA Medical Center, where he was awarded the Commendation for Excellence in Medical Student Teaching. He completed his fellowship training in Cardiology and Interventional Cardiology at Cedars-Sinai Medical Center in Los Angeles.

Dr. Wertman has authored numerous publications in leading peer-reviewed journals on topics relating to Interventional Cardiology and has participated in several live case transmissions to national meetings demonstrating new techniques in the treatment of coronary artery disease and valvular heart disease. Dr. Wertman has received extensive training in the percutaneous treatment of valvular heart disease, including aortic valve replacement using the Edwards Sapien Valve as well as mitral valve repair using the Abbott Mitra-Clip system. He additionally has significant experience in several other novel interventional therapies, including Atrial Septal Defect (ASD) and Patent Foramen Ovale (PFO) closure, Left Atrial Appendage closure, and Alcohol Septal Ablation for Hypertrophic Cardiomyopathy.

Dr. Wertman was born and raised in Newport Beach and in his spare time enjoys relaxing with his family, travel, and exercise.  He currently serves as Director of the Cardiac Rehabilitation Program at Hoag Hospital Irvine and was named a Physician of Excellence by the Orange County Medical Association (OCMA) for 2016 and 2017.

Procedures Performed

  • Coronary angiography (radial and femoral approach)
  • Coronary angioplasty and stenting
  • Atrial Septal Defect (ASD) and Patent Foramen Ovale (PFO) closure
  • Aortic Valvuloplasty
  • Transcatheter Aortic Valve Replacement (TAVR)
  • Left Atrial Appendage closure
  • Vein ablation and sclerotherapy
  • Transesophageal Echocardiography (TEE)


  • Board Certified, Interventional Cardiology
  • Board Certified, Cardiology
  • Board Certified, Internal Medicine

Degrees and Training:

  • Fellowship in Interventional Cardiology, Cedars-Sinai Medical Center.
  • Fellowship in Cardiology, Cedars-Sinai Medical Center.
  • Residency in Internal Medicine, University of California Los Angeles Medical Center.
  • Medical Degree, University of Washington.
  • Bachelor of Arts in Biochemistry, University of Colorado, Boulder.
  • Bachelor of Arts in Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder.

Huy T. Nguyen, M.D., F.A.C.C.
Interventional Cardiology, General Cardiology

Dr. Nguyen joined Coastal Cardiology in October 2015 and previously was the Director of Cardiology at High Desert Cardiology-St. Mary High Desert Medical Group (Apple Valley, CA).  He grew up in Irvine, CA and received his Bachelor of Arts in Biology from the University of California, Irvine.  He then received a Masters in Applied Physiology and earned his medical degree from the Chicago Medical School (North Chicago, IL).  He returned to Orange County for his internship and residency in Internal Medicine, as well as his General Cardiology fellowship training at UC Irvine Medical Center in Orange, CA.  He moved to New York to complete his Interventional Cardiology fellowship at Mount Sinai Hospital, where he was awarded Outstanding Interventional Cardiology Fellow of the Year.

Throughout the course of his training, Dr. Nguyen has given numerous lectures, presentations, and 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, and he is an expert in the use of Rotational Atherectomy for calcified coronary artery lesions.  He also has been a reviewer for a leading journal of interventional cardiology, Catheterization and Cardiovascular Interventions, since 2012.  His special interests include chronic heart failure (CHF) management, novel percutaneous transcatheter treatment of valvular heart disease, and 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.