The South Orange County Cardiology Group specializes in all facets of cardiovascular health and risk prevention. Our practice uses the most accurate instruments for imaging, diagnosing, and more. Our laboratory is accredited by the Intersocietal Accreditation Commission (IAC) for Echocardiography.

Doctor Examining Human Lungs and Pacemaker
  • Arrhythmia
  • Atrial Fibrillation
  • Atrial Flutter
  • Cardiac Tumors
  • Cardiomyopathy
  • Coronary Artery Disease
  • Heart Failure
  • Hypertension
  • Hyperlipidemia
  • Hypertrophic Cardiomyopathy
  • Intermittent Claudication
  • Peripheral Vascular Disease
  • Pericarditis
  • Pulmonary Hypertension
  • Supraventricular Tachycardia
  • Syncope
  • Valvular Heart Disease
  • Ventricular Tachycardia​
  • WPW
  • Ablation procedures
  • Angioplasty / Stent (Coronary, Renal and Peripheral Arteries)
  • Cardiac Resynchronization Pacemaker Devices
  • Carotid Ultrasound
  • Cholesterol Screening
  • Defibrillators
  • Echocardiograms
  • ECP (External Counter Pulsation)
  • EKG
  • Electrophysiology Studies
  • Event Arrhythmia Monitoring
  • Heart Catheterizations
  • Holter Monitoring
  • Monitoring Anticoagulant Therapy
  • Nuclear Stress Tests
  • Pacemakers
  • Pacemaker Clinic
  • PFO Occlusion
  • Risk Factor Management
  • Stents
  • Stress Echos
  • Stress Testing
  • TAVR (Non-surgical aortic valve replacement)
  • Tilt Table Studies
  • Watchman (Left atrial occlusion device)

Meet the Experts of Cardiology Practice

You’re in the best and most specialized hands at South Orange County Cardiology Group. Our board certified cardiologists provide our patients with the highest-quality medical care.

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Jeffrey F. Feiner


Practice in Cardiology since 1982

St. Mary Medical Center, Cardiology
Fellowship 1982

St. Mary Medical Center/Harbor-UCLA, Internal Medicine
Residency 1980, Internship 1978

S.U.N.Y. Downstate Medical School
Medical School 1977

Brooklyn College, B.S. Chemistry
Undergraduate 1974

Hometown: Brooklyn, New York
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Robert K. Masters


Practice in Cardiology since 1984

Baylor University, Cardiology
Fellowship 1984

University of Southern California, Internal Medicine
Residency 1975, Internship 1973

University of California, Irvine
Medical School 1972

Fresno State University, B.S. Chemistry
Undergraduate 1968

Hometown: Lakeport, California
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Douglas P. Lyle


Practice in Cardiology since 1997

Texas Heart Institute, Cardiology
Fellowship 1976

University of Texas at Houston, Internal Medicine
Residency 1974

University of Alabama Medical College, Internal Medicine
Medical School 1972, Internship 1973

University of Alabama, B.S. Chemistry
Undergraduate 1968

Hometown: Huntsville, Alabama
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Michael J. Gault


Practice in Cardiology since 1984

University of California Irvine, Cardiology
Fellowship 1996

Harbor-UCLA, Internal Medicine
Residency 1993, Internship 1991

UHS/Chicago Medical School
Medical School 1990

University of California, San Diego, B.S. Biochemistry
Undergraduate 1983

Hometown: La Habra, California
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Daniel H. La Mont


Practice in Cardiology since 1999

Good Samaritan Hospital Los Angeles, Interventional Cardiology
Fellowship 1999

University of California Irvine, Cardiology
Fellowship 1998

Harbor-UCLA, Internal Medicine
Residency 1994, Internship 1992

Brown University
Medical School 1991

University of Southern California, B.S. Psychobiology
Undergraduate 1986

Hometown: Escondido, California
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Howard I. Frumin


Practice in Cardiology/Electrophysiology since 1983

Montefiore Hospital, N.Y., Electrophysiology
Fellowship 1983
Sinai Hospital of Detroit, Cardiology
Fellowship 1982

Mercy Hospital, San Diego, Internal Medicine
Residency 1981, Internship 1979

Wayne State University School of Medicine
Medical School 1978

University of Michigan
Undergraduate 1971

Hometown: Detroit, Michigan
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Ronald D. Gim


Practice in Cardiology since 2004

University of California Irvine, Interventional Cardiology
Fellowship 2004 University of California Irvine, Cardiology
Fellowship 2003

University of California Irvine, Internal Medicine
Residency 2000, Internship 1998

University of California San Diego
Medical School 1997

University of California San Diego, B.S. Chemical Engineering
Undergraduate 1991

Hometown: Cleveland, Ohio
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John N. Bahadorani


Practice in Cardiology since 2013 and Interventional Cardiology since 2014

Internal Medicine, Cardiology, Interventional Cardiology, Nuclear Cardiology, Registered Physician in Vascular Interpretation
Board Certification

University of California San Diego, Interventional Cardiology (Advanced Coronary Intervention, Structural heart, and Peripheral intervention)
Fellowship 2015
University of California San Diego, Interventional Cardiology
Fellowship 2014
Tulane Heart and Vascular Institute, Cardiology
Fellowship 2010-2013

University of Texas Southwestern, Internal Medicine
Residency 2010, Internship 2008

University of Texas Medical Branch
Medical School 2007

Texas A&M University, Biomedical Science
Undergraduate 2002

Hometown: Houston, Texas
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Ryland E. Melford

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Ashish M. Shah


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