Meet Our Team

Dr. Shahid Habib

Dr. Shahid Habib

Dr. Shahid Habib is a Hepatologist in Tucson, Arizona and is affiliated with multiple hospitals in the area, including Southern Arizona Veterans Affairs Health Care System and St Joseph’s Hospital. His practice emphasis is comprehensive liver disease care. He attended Quaid-e-Azam Medical College and completed residency and fellowship (Internal Medicine & Gastroenterology) training at Federal Postgraduate Medical Institute and King Edward Medical University, Mayo Hospital Lahore, Pakistan. He subsequently has further advanced training at Western General Infirmary, University of Glasgow UK, Banks town Hospital, University of New South Wales (NSW) Sydney. Australia (Gastroenterology) and the University of Pittsburgh Medical Center (Hepatology and Liver Transplantation). His special interests include liver failure, liver transplantation and NASH (fatty liver disease). His goal of practice is cure and prevention of liver disease.

Board certifications

  • American Board of Internal Medicine

  • American Board of Gastroenterology & Hepatology

  • MRCP Internal Medicine UK

  • MRCP Gastroenterology & Hepatology UK

  • EUROPEAN Specialty Certification in Gastroenterology & Hepatology

  • Transplant Hepatology UPMC trained

  • FCPS Pakistan



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Dr. Mona Sheikh

Dr. Sheikh is medical doctor in training at liver institute. She graduated in 2011 from Egypt. She completed her Initial training in Egypt. She was Arizona board certified to work as a training doctor in 2022. She is actively pursuing her masters in public health at university of North Texas alongside training full time at Liver Institute. Dr. Sheikh is also part of the research team at liver institute.


  • MD: University Faculty of Medicine Egypt, 2011
  • MPH: University of North Texas, expected 2023
Marsha McCary

Marsha McCary

Nurse Practitioner ( Metabolic Liver Disease, Fatty Liver, NASH)

Marsha McCary MSN, FNP-C is a specialized in treating Metabolic Liver Diseases, Fatty Liver Disease and NASH at Liver institute PLLC. McCary has over 12 years of nursing experience in the area including ICU care, Gerontology, Women’s Health, Family Medicine and Pediatrics. She is affiliated with the American Association of Nurse Practitioners, and Sound Nurse Practitioners Association.McCary gained her professional experience by working as a registered nurse at Suburban Hospital-Affiliate of Johns Hopkins and Tacoma General Hospital. McCary also worked with the Centers for Disease Control and Prevention as a Public Health Response Operations Coordinator. Marsha has been with Liver institute since 2019.


  • MSN: Master of Science in Nursing, The George Washington University Washington, D.C.
  • BCN: Bachelor of Science, Arizona State University Tempe, Arizona
  • ADN: Associate Degree in Nursing, Golden West College, Huntington Beach, California
Elyse L Hammett

Elyse L Hammett

Nurse Practitioner ( Acute Care, Liver Failure)

Elyse Hammett, MSN, FNP-C, previously worked as a gastroenterology and hepatology acute care nurse practitioner for six years with Southern Arizona Gastroenterology & Northwest Allied Physicians. She gained her experience as an acute care nurse practitioner working with Northwest Intensivist Physicians Group from 2010-2014. NP Hammett is very passionate and caring toward her patients. She is experienced and trained in managing complex, acutely ill patients during extremely stressful conditions and helping them through these difficult times.


  • MSN: Masters of Science in Nursing, University of Arizona, 2006
  • BSN: Bachelor of Science in Nursing, University of Arizona, 2001
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Nurse Practitioner (Hepatitis and Autoimmune diseases)

Lisa Arrett is an Adult Gerontology Acute Care Nurse Practitioner (MSN, AGACNP, BC). She earned her Master of Science in Nursing with emphasis on Adult-Gerontology from the Grand Canyon University in 2018. Lisa has over 9 years of nursing experience in areas including cardiology and ER. She is affiliated with the American Association of Nurse Practitioners, Academy of Medical-Surgical Nurses and the American Red Cross, Disaster Health Services Team.Lisa has worked at Onward Healthcare: RN-Telemetry in Cardiology unit, St. Mary’s Hospital-Carondelet Health Network: RN-Telemetry/ PCU, Sanford Health: RN-Med-Surg, Arizona community physicians and as Travel Nurse Across America LLC: RN-Telemetry, PCU, ER, Med-Surg.


· MSN (Master of Science in Nursing): Grand Canyon University, 2018

· BSN (Bachelor of Science in Nursing): North Dakota State University, 2013

· ADN (Associate’s in Nursing): Kirkwood Community College, 2010

Loan D. Whitmore

Loan D. Whitmore

Nurse Practitioner

Loan Whitmore MSN, FNP-C has over 14 years of nursing experience, including Podiatry, Gastroenterology, urgent care, research and nursing administration. Whitmore has worked as a nurse practitioner in Northwest Medical Center, University of Arizona Health Network, Oro Valley Hospital Gastroenterology Department, and Fast Med Urgent Care Tucson. She is a member of the American Academy of Nurse Practitioners, Southern AZ Nurse Practitioners Association, Sigma Theta Tau, Medical-Surgical Nursing Association, and Arizona Nursing Association.


  • MSN: Family Nurse Practitioner – Honors: University of Phoenix, 2016
  • BS (Nursing – Honors): Grand Canyon University, 2009
  • Associate Degree (Nursing): Pima Community College, 2002