Holiday hours

With the exception of Inova hospitals and Inova Emergency Care, all Inova outpatient offices will be closed on Monday, Jan. 19 for the Martin Luther King Jr. Day holiday. 

All Inova-GoHealth Urgent Care locations will be open for in-person visits from 9 a.m. to 5 p.m. Virtual urgent care services will be available until 8 p.m.

Our Team

Meet the highly skilled adult and pediatric cardiac surgeons, thoracic surgeons and interventional pulmonologists who make up the team of experts at Inova Cardiac and Thoracic Surgery.

Hassan Tetteh, MD
Hassan A. Tetteh, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Clinical Informatics, Thoracic and Cardiac Surgery, Surgery
Years of Experience
28
Kathleen Petro, MD
Kathleen R. Petro, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Thoracic and Cardiac Surgery
Clinical Interests
Adult Heart Surgery
Years of Experience
33
Amit Mahajan, MD
Amit K. Mahajan, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Pulmonary Disease, Critical Care Medicine
Clinical Interests
Bronchial stenosis, Central airway obstruction, Complex Airways Disease, Minimally Invasive Bronchoscopic Volume Replacement, Tracheal Stenosis
Years of Experience
20
Lucas Collazo, MD
Lucas R. Collazo, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Thoracic and Cardiac Surgery, Congenital Cardiac Surgery
Clinical Interests
Children's Heart, Children's Heart Surgery
Years of Experience
37
Alan Speir, MD
Alan M. Speir, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Thoracic and Cardiac Surgery
Clinical Interests
Adult Heart Surgery
Years of Experience
51
Ramesh Singh, MD
Ramesh Singh, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Thoracic and Cardiac Surgery
Clinical Interests
Adult Heart Surgery
Years of Experience
26
Eric Sarin, MD
Eric L. Sarin, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Thoracic and Cardiac Surgery
Clinical Interests
Adult Heart Surgery
Years of Experience
28
Liam Ryan, MD
Liam P. Ryan, MD

Inova providers are Inova's premier primary care and specialty physicians and providers, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records. 
Specialty
Thoracic and Cardiac Surgery
Clinical Interests
Adult Heart Surgery
Years of Experience
24