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8095 Innovation Park Drive, Fairfax, VA 22031

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Medical Directors

Steven Nathan, MD

Steven D Nathan, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Pulmonary Disease, Critical Care Medicine, Internal Medicine
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Lung Problems and Treatment
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 42
Shambhu Aryal, MD

Shambhu Aryal, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Pulmonary Disease, Critical Care Medicine, Internal Medicine
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Years of Experience: 18

Lung Transplant Specialists

Anne W Brown, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Pulmonary Disease, Critical Care Medicine
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Lung Problems and Treatment
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 20

Vikramjit S Khangoora, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Pulmonary Disease, Internal Medicine, Critical Care Medicine
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Years of Experience: 11

Christopher S King, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Critical Care Medicine, Pulmonary Disease, Internal Medicine
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Years of Experience: 21
Alan Nyquist, MD

Alan S Nyquist, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Pulmonary Disease, Internal Medicine, Critical Care Medicine, Pediatrics
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Years of Experience: 10

Oksana A Shlobin, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Critical Care Medicine, Pulmonary Disease
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Lung Problems and Treatment
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 24

Anju L Singhal, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Critical Care Medicine, Pulmonary Disease, Internal Medicine, Pediatrics
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Asthma, Lung Problems and Treatment
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 14

Christopher A Thomas, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Critical Care Medicine, Pulmonary Disease, Internal Medicine
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Years of Experience: 8

Michelle N Kopp, PA

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Physician Assistant
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.

Lung Transplant Surgeons

Eric Sarin, MD

Eric L Sarin, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 25
Liam Ryan, MD

Liam P Ryan, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 21
Ramesh Singh, MD

Ramesh Singh, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Clinical Interests: Adult Heart Surgery
Areas of special interest identified by the physician or additional training completed.
Years of Experience: 23
Daniel Tang, MD

Daniel G Tang, MD

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Thoracic and Cardiac Surgery, Surgery
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.
Years of Experience: 24

Nurse Practitioners

Jessica C Chun, DNP, NP

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Nurse Practitioner
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.

Margaret M Fregoso, NP

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Nurse Practitioner
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.

Lauren M Marinak, NP

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Family Nurse Practitioner
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.

Nichole M. Sisserson, PA

A member of Inova Medical Group
The doctors of Inova Medical Group are Inova’s premier primary care and specialty physicians, offering top-notch medical expertise, full access to Inova facilities, and the convenience of integrated electronic medical records.
Specialty: Physician Assistant
Board-certified specialties granted by an ABMS Member Board. Learn more about board certification.

Social Workers

Elizabeth Davies

Elizabeth Davies, LCSW

Social Worker

Clinical Transplant and Lung Disease Pharmacist

Adam Cochrane, PharmD, BCPS

Adam Cochrane, PharmD, BCPS

Lung Transplant Pharmacist

Nurse Coordinators

Johanna Coughlin, RN

Johanna Coughlin, RN

Pulmonary Hypertension Coordinator
Alicia Echols, RN

Alicia Echols, RN

Pulmonary Hypertension Coordinator
Shanna Guzman, RN

Shanna Guzman, RN

Pre-Lung Transplant Coordinator
Patricia Jackson, RN

Patricia Jackson, RN

Pulmonary Hypertension Coordinator
Rebecca Packer, RN

Rebecca Packer, RN

Advanced Lung Disease Coordinator
Morgan Wahl, RN

Morgan Wahl, RN

Inpatient Coordinator