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Northern Arizona VA Health Care System


Leadership Team

Portrait of Barbara A. Oemcke, MBA

Barbara A. Oemcke, MBA | 928-445-4860, ext. 6552

Medical Center Director

Ms. Oemcke was appointed Medical Center Director at the Northern Arizona VA Health Care System effective March 5, 2017.

Ms. Oemcke’s 30 years of Healthcare leadership experience includes Foodservice Management, Clinical Nutrition, Revenue Cycle Management, Business Management and Healthcare Administration. She served as interim Business Manager for VISN 23, during which time she led the successful roll-out of Fee Basis Claims Software and initiated the successful consolidation of VISN 23 revenue functions to the Central Plains Consolidated Patient Account Center. Ms. Oemcke also held positions of Associate Director and Interim Medical Center Director at the Southern Oregon Rehabilitation Center and Clinics from 2013 through 2017.

Ms. Oemcke holds a Bachelor's Degree in Nutrition from North Dakota State University and a Master’s Degree in Business Administration from St. Cloud State University as well as a graduate of the 2012 VA Health Care Leadership Development Program (HCLDP). Ms. Oemcke is involved in numerous National VA committees and workgroups. She is an outdoor enthusiast, enjoying travel, bicycling, hiking and the many outdoor recreational opportunities in Northern Arizona.

Portrait of Karen MacKichan, MD

Karen MacKichan, MD | (928) 445-4860 ext 6009

Acting Chief of Staff

Dr. MacKichan was appointed Acting Chief of Staff at the Northern Arizona VA Health Care System effective September 17, 2018.

Dr. Karen MacKichan, has been the Deputy Chief of Staff at SAVAHCS since June 2016. She has been the Assistant Chief of Medicine and intermittent hospitalist since November 2015. Prior to that, Dr. MacKichan was the Chief of Staff at the Yakima Regional Medical Center in Washington and the Medical Director of the DaVita Yakima Dialysis Unit in Washington. She is board certified in Nephrology, and has completed certification training thru the American Board of Quality Assurance and Utilization Review Physicians for Hospital Certification Quality Management (HCQM). Dr. MacKichan attended Medical School at the University of Washington; and completed her internship and residencies at the University of Washington affiliated Hospitals in Seattle. She also established and ran a solo practice in General Nephrology for over 10 years; and was the Medical Director of the Kidney/Pancreas Transplant program at the Memorial Medical Center in Springfield, Illinois. Dr. MacKichan is affiliated with the University of Arizona as Clinical Assistant Professor of Medicine. She is an accomplished educator, having served as an Assistant Clinical Professor at the Southern Illinois University Medical School, an Instructor of Nephrology and Transplantation at the University of Washington, and a guest lecturer at the MEDEX Physician Assistant program at the University of Washington.

Portrait of Lisa Martin

Lisa Martin | 928-445-4860 ext 6553

Associate Director

Ms. Martin was appointed Associate Director at the Northern Arizona VA Health Care System effective March 18, 2018.

Ms. Martin is a 21-year Air Force Veteran with over 20 years of health care and leadership experience at the Federal, State and local levels. She recently completed a three year assignment as the Wyoming Health Care Center Director after serving as Chief of Health Administration with the Battle Creek VA Health Care System. Prior to working with the Department of Veteran Affairs, she worked for the Department of the Army as a Senior Management Analyst for Headquarters Army Europe.

Ms. Martin holds an undergraduate degree in Business Administration from the University of St. Thomas and a graduate degree in Public Administration from California State University Bakersfield.

Portrait of Mary Pittman Mach RN, MSN

Mary Pittman Mach RN, MSN | 928-445-4860 ext 6557

Acting Associate Director for Patient Care Services/Nurse Executive

Mary Pittman Mach RN, MSN
NAVAHCS Acting Nurse Executive/Associate Director for Patient Care Services
Appointment: August 22, 2018

Ms. Pittman-Mach is from St. Cloud, Minnesota. She grew up in Fulda MN, a small farming town in southwest Minnesota. She attended the College of St. Benedict and graduated with her BSN in 1984. She received her MSN from the University of Phoenix in 2011. Mary has a work history that includes LTC, SICU, OR, ER, Public Health, and 17 years of leadership. She is currently the Nurse Administrator of the Surgery, Specialty Care Service Line and Nursing Education at the St. Cloud MN VAHCS.

She and her husband Bob have been married 34 years and have two children. Her son Christopher is 31 and her daughter Chelsea is 28. They are both RNs. Christopher is completing a CRNA program and will take his boards in December. Chelsea works as a RN in a small town hospital, so has learned to be a jack of all trades. They are both married, Chelsea to Mike ( a railroad engineer) and Christopher to Magaly (an Urgent Care RN.) Mary will become a first-time grandmother in October as her daughter is expecting.