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Corporate Officers

Edward P. Hu, MD,  CHCQM-PHYADV                         Email Dr. Hu

Dr. Edward P. Hu completed his medical education at Washington University School of Medicine in St. Louis, Missouri, and went on to complete his residency in internal medicine at Duke University Medical Center in Durham, NC. Dr. Hu is board certified in internal medicine and health care quality and management, with a subspecialty certification as a physician advisor.He practiced as a hospitalist for 14 years and served as a Medical Director of Case Management at UNC Rex Hospital in Raleigh, NC. Currently, he serves as the UNC Health Care System Executive Director of Physician Advisor Services, supporting the development of PA programs at 10 system hospitals. His areas of interest include Medicare regulations, revenue cycle, compliance, patient safety and quality, and risk adjustment. He is proud to be able to serve the American College of Physician Advisors.


He is married and has two children. In his spare time, he loves travel and all things Disney.

Charles Locke, MD                                                     Email Dr. Locke
President Elect

 Dr. Charles Locke has been a Physician Advisor, Utilization/Clinical Resource Management for Johns Hopkins Hospital since 2011 and the Senior Physician Advisor since 2013. He is also an Assistant Professor in the Department of Medicine, Johns Hopkins School of Medicine. He has been active in areas CMS hospital payment and audit policy, including visit status determination and the Recovery Audit (RA) program. Dr. Locke continues to have active clinical duties, including serving a preceptor for Johns Hopkins internal medicine residents in an ambulatory clinic and as an attending physician on one of the inpatient medicine services at Johns Hopkins Hospital..

Dr. Locke received his medical degree from the University of Pennsylvania, completed his internship and residency in internal medicine at the University of Virginia Health Sciences Center, and is a graduate of the Johns Hopkins Faculty Development Program for Clinical Educators.

E.G. "Nick" Ulmer, Jr., MD, CPC                               Email Dr. Ulmer
Vice President

 Dr. Nick Ulmer is a Family Physician whose career began in 1991 and includes 10 years of obstetrics and 17 years of hospital-based medicine. Dr. Ulmer realized the importance of correct coding and documentation early in his career and became a Certified Professional Coder in 2001; making him one of only 16 physicians nationally at that time with the dual "MD/CPC" credentials.


He used his knowledge of coding and hospital medicine to develop an internal physician advisor program at Spartanburg Regional Healthcare System to address issues relating to case management, correct status determination, and appeals management.

He is VP of Clinical Services and Medical Director of Case Management at SRHS and is active in physician education at SRHS in the areas of outpatient practice management as well as various inpatient clinically correct coding initiatives.

Larry Hegland, MD, MMM                                        Email Dr. Hegland
Vice President

Dr. Larry Hegland is the System Medical Director for Recovery Audit and Appeal Services for Ministry Health Care. He also serves as Chief Medical Officer for Ministry Saint Clare’s Hospital, Ministry Good Samaritan Medical Center and The Diagnostic and Treatment Center in Weston, Wisconsin.

Dr. Hegland received his training as an anesthesiologist at Northwestern University and possesses a degree in Medical Management from Carnegie Mellon University.

Daniel Zirkman, MD                                                  Email Dr. Zirkman

Dr. Daniel Zirkman completed a residency in Internal Medicine and fellowship training in Nephrology at Montefiore University Hospital in Pittsburgh, Pennsylvania. Dr. Zirkman has practiced Nephrology for the past 23 years, during which time he served as the Medical Director of the inpatient dialysis unit at Jersey Shore University Medical Center in Neptune, New Jersey, and on the Trans Atlantic Renal Council in an advisory role. 

He has been active in organized medicine serving as the Chief of Medicine at Centrastate Medical Center in Freehold, New Jersey and as a member of the hospital's Medical Executive Committee and long-range Strategic Planning Committee. 

In 2012, Dr. Zirkman joined Executive Health Resources where he served as a Physician Advisor in the Government Appeals department handling all levels of Medicare and Medicaid denials including administrative law judge (ALJ) hearings. He assumed his current position as full time physician advisor in 2014 at Riverview Medical Center, part of the Hackensack-Meridian System, in Red Bank, New Jersey. With a particular interested in clinical documentation improvement, Dr. Zirkman has lectured to medical staffs on CDI, ICD-10 implementation, and the 2-midnight rule.

Dr. Zirkman served as the President of the Monmouth County Medical Society (2010-2012) and has been a member of the Board of Trustees of the state Medical Society of New Jersey for the past 4 years. He has participated actively in a number of hospital committees including physician peer review, critical care, bioethics, and has collaborated with the hospital IT department at Centrastate Medical Center in helping design, build, and implement the hospital's computer physician order entry system (CPOE).

Dr. Zirkman is married with three children and still spends much of his free time recalling his athletic endeavors from younger days.


Larry Field, DO, MBA                                           Email Dr. Field

Dr. Larry Field has extensive experience as treasurer during two State of Florida House of Representatives political campaigns and other Corporations. Since 2010, Dr. Field has been a Health System Physician Advisor at Munroe Regional Medical Center; a 421 bed acute care hospital in Ocala, Florida. 

Since 2010, he has been a consultant to physicians and hospitals on regulatory and other matters as CEO of Medical Analytics Group Inc. From 2008 through 2010 Dr. Field was a General Internal Medicine Hospitalist. Between 1999 and 2008 he served as the CEO for Hyperbarics of Ocala Inc. and Medical Director of Hyperbaric Medicine, as well as a Wound Specialist at Ocala Regional Medical Center. 

He was also the CEO of IMed Consortium from 1992 to 1999. Prior to forming IMed Consortium, Dr. Field was an Internal Medicine Resident at Presbyterian University of Pennsylvania Medical Center in Philadelphia, PA, and was a Transitional Intern at Humana Hospital of the Palm Beaches in Florida. 

Dr. Field received his B.S. degree in Business Management from Boston University, his DO degree from Nova Southeastern College of Osteopathic Medicine and his MBA from the University of South Florida. Dr. Field has always been interested in the regulatory aspects of health care. He has formalized the regulatory interest with additional training and is certified in Healthcare Quality Management (CHCQM), Professional Coder (CPC), and Healthcare Compliance (CHC). Dr. Field is also a licensed Risk Manager in Florida. 

Dr. Field been trained by the National Institute of Standards and Technology, a non-regulatory agency of the United States Department of Commerce, in the Malcolm Baldrige Quality healthcare criteria and is also AHIMA ICD 10CM/PCS trained.

Elizabeth Lamkin, MHA                                                 Email Ms. Lamkin
Chief Operating Officer

Ms. Elizabeth Lamkin is a national speaker and author on operations, quality, utilization, and billing compliance. Her most recent publication with HCPro is The Revenue Integrity Training Toolkit.

Ms. Lamkin has over 20 years of experience as a hospital CEO and has served in teaching hospitals, non-profit and investor owned sectors of healthcare where she developed forward thinking systems to improve quality and utilization. 

And she holds a Master’s in Healthcare Administration from the University of South Carolina, Columbia and BA Cum Laude, Core in Business Administration, from the University of South Carolina.