Mercy Hospital Cardiothoracic Surgical Associates

A Department of Mercy Hospital of Buffalo

Plan Your Visit

515 Abbott Rd
Ste 310
Buffalo, NY 14220
Phone Number

Servicing Hours


Monday - Thursday: 9 a.m. to 4 p.m.

Friday: 9 a.m. to 3 p.m.


Mercy Hospital Cardiothoracic Surgical Associates is home to some of the region's top interventional cardiologists and thoracic surgeons. Our team consists of experienced physicians who are specialists in performing both minimally invasive and advanced procedures of the heart and lungs. We focus on providing patients with comprehensive care, which includes collaboration with highly-skilled nurse practitioners and physician assistants. 

Cardiothoracic Surgeries

Surgeries performed include:

  • Minimally invasive heart surgery - Our cardiac surgeons offer minimally invasive procedures that result in less pain, less scarring, and less risk of infection and complication. Recovery time is also quicker, allowing you to return to normal activities more quickly than after traditional open heart surgery.
  • Open heart surgery
  • Beating heart (off-pump) heart surgery
  • Coronary Artery Bypass Grafting (CABG)
  • Aortic valve repair / replacement
  • Mitral valve repair
  • Aortic aneurysm repair
  • Placement of Ventricular Assist Devices (VADs)
  • Surgery for lung and esophageal cancers

Cardiothoracic Conditions

Conditions that we treat include:

  • Coronary artery disease
  • Chest pain
  • Shortness of breath
  • Lung cancer / lung mass / lung nodule / lung neoplasm
  • Chronic Heart Failure (CHF)
  • Aortic aneurysm
  • Aortic stenosis
  • Aortic dissection
  • Aortic insufficiency
  • Mitral valve stenosis
  • Mitral valve regurgitation
  • Tricuspid valve disease
  • Ventricular septal defect
  • Mediastinal mass


Learn more about our experienced surgeons, including their background and recent achievements.

Stephen W. Downing, MD
Harsh Jain, MD
Mark Jajkowski, MD
Jiantao Xiao, MD


Free parking is available on-street or in the parking ramp at Mercy Hospital. If you park in the ramp, your parking ticket will be validated in our office and the parking fee will be waived.

Please note that for visitors to the Marian Building, there are designated parking spots on the third floor of the parking ramp.

View our Parking & Location Map for detailed directions.

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Catholic Health strives to provide quality care and outstanding service. Take the time to cheer on and recognize an associate(s) that exceeded your expectations. To recognize an associate click here.