Alonso Collar

Alonso Collar, M.D.

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  • Cardiovascular Surgery
  • Vascular Surgery

Provider Type: Physician

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Alonso Collar, M.D., is a cardiovascular and vascular surgeon with MidMichigan Physicians Group and is a member of the comprehensive heart and vascular team at MidMichigan Health. This team includes cardiologists and interventional cardiologists, electrophysiologists, heart failure and structural heart specialists, as well as vascular and cardiovascular surgeons.

As a cardiovascular and vascular surgeon, Dr. Collar specializes in the surgical treatment of conditions and diseases affecting the heart and vascular system. He treats a wide variety of conditions, including coronary artery disease, valvular heart disease, aortic aneurysms and dissections, heart valve blockages and heart failure. He also treats patients with all forms of vascular disease, including those with aneurysms in the chest, abdomen or extremities; PAD; carotid disease or other blockages that may cause a stroke.

Before coming to MidMichigan, Dr. Collar served on the medical staff at Sparrow Hospital in Lansing where he specialized in cardiac, thoracic and vascular surgery. He has practiced thoracic and cardiovascular surgery in the Lansing area since 1986.

Philosophy of Care

“I believe in putting my patients first and working collaboratively with a comprehensive team of heart and vascular experts to ensure that their needs are met," he said. "Together we combine the art and science of medicine to deliver high-quality, compassionate and affordable care.”

Special Interests and Procedures

Dr. Collar performs both cardiovascular and vascular surgical procedures. Some of his special interests and procedures include:

  • Adult Congenital and Acquired Heart Disease
  • Aortic Root Surgery
  • Minimally Invasive Aortic Valve Surgery, including Transcatheter Aortic Valve Replacement (TAVR)
  • Structural Heart Disease
  • Coronary Artery Bypass Surgery
  • Mitral Valve Reconstructive Surgery
  • Endovascular Aneurysm Repair – Abdominal, Thoracic and Hybrid Procedures
  • Vascular and Endovascular Intervention
  • Peripheral Angioplasty and Stenting


  • Male

Year Began Practicing

  • 1984

Board Certified

  • Thoracic and Cardiovascular Surgery


  • English


Medical School

Michigan State University College of Human Medicine, East Lansing, MI, DOCTOR OF MEDICINE


Mayo Clinic, College of Medicine and Science, Rochester, MN, GENERAL SURGERY


University of Florida College of Medicine, Gainesville, FL, CARIDAC & THORACIC SURGERY

Clinical Interests & Special Procedures

  • Fenestrated Endovascular Aortic Aneurysm Repair
  • Aortic Aneurysm Surgery
  • Mesenteric and Renal Artery Endovascular & Open Repair
  • Coronary Artery Bypass Graft Surgery
  • Thoracic Endovascular Aneurysm Repair (TEVAR)
  • Atrial Fibrillation Surgery Cox-Max IV
  • Valvular Heart Surgery & Mitral Valve Repair
  • Transcatherer Mitral Value Repair (TMVR)
  • Carotid Stenting
  • Video-Assisted Thoracic Surgery (VATS)
  • Thoracic Aortic Aneurysm Surgery
  • Transcatheter Aortic Value Replacement (TAVR)
  • Aortic Root Surgery
  • Endovascular Techniques: Angioplasty & Stenting

Professional Memberships

  • Fellow - American College of Surgeons
  • American Heart Association
  • American Medical Association
  • American College of Chest Physicians
  • Michigan Society of Thoracic Surgeons


"I believe in putting my patients first and working collaboratively with a comprehensive team of heart and vascular experts to ensure that their needs are met."

Participating Insurances*

  • Morbark
  • United Healthcare Commercial
  • Optum VA Choice
  • TriCare WPS - Prime
  • TriCare Humana
  • ConnectCare - MidMichigan Health
  • Blue Cross Blue Shield Trust PPO
  • Blue Cross Blue Shield Traditional
  • Blue Cross Blue Shield Medicare Plus Blue (Medicare Advantage)
  • Blue Care Network Medicare Advantage HMO
  • PACE Central Michigan (Program for All-inclusive Care for the Elderly)
  • Medicaid
  • Molina - Medicaid
  • Priority Health Medicare Advantage PPO
  • Medicare
  • Blue Care Network
  • Priority Health HMO
  • Priority Health PPO
  • Humana Medicare Advantage HMO/PPO
  • ConnectCare - Northwood University
  • McLaren Health Plan - Medicaid
  • HAP - Preferred
  • HAP - PPO
  • MultiPlan (PHCS)
  • HAP Medicare Advantage HMO
  • HAP Medicare Advantage PPO
  • Aetna Better Health - Medicaid
  • Aetna Medicare Advantage
  • Cigna
  • Aetna
  • Priority Health Medicare Advantage HMO
  • Cofinity
  • Medicare Railroad
  • US Health and Life
  • Meridian Health Plan - Medicaid

*Insurance Disclaimer

These are the insurance plans in which this individual is a "participating provider". This provider may accept other insurance, but your costs may be higher if they do not "participate" in your plan.


  • Cardiovascular (heart)
  • Vascular Surgery

Employed By

MyMichigan Medical Group

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