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HomeBoard of Directors

American College of Physician Advisors

Corporate Officers

Charles Locke, MD | President

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.

Larry Field, DO, MBA | Vice President

Since 2010, Larry Field, DO, MBA, CHCQM, CPC, CHC, LHRM has been a Health System Physician Advisor at Ensemble Health Partners, Catholic Health Initiatives and AdventHealth Ocala – a 421 bed acute care hospital in Ocala, Florida. He currently serves as the Chief Medical Director for the CMS Medical Review Accuracy Contractor. 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 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 BS 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.

He is a founding member of the American College of Physician Advisors (ACPA) and serves on the Board of Directors and is part of the Executive Team in the Treasurer role.

Juliet B. Ugarte Hopkins, MD, CHCQM-PHYADV | Vice President

Dr. Juliet Ugarte Hopkins is a graduate of the University of Illinois College of Medicine and served as co-chief resident while in her Pediatrics residency at Advocate Lutheran General Children’s Hospital in Park Ridge, Illinois. Dr. Ugarte Hopkins practiced as a pediatric hospitalist for a decade and also served as medical director of pediatric hospital medicine and vice-chair of pediatrics at Rockford Health System in Rockford, Illinois before transitioning into her current role as the first Physician Advisor for Case Management, Utilization, and Clinical Documentation at ProHealth Care, Inc., a two-hospital, 575-bed health system in Southeastern Wisconsin.

Dr. Ugarte Hopkins is board-certified in health care quality and management with a physician advisor sub-specialty by the American Board of Quality Assurance and Utilization Physicians (ABQAURP). She is the first physician board member for the Wisconsin chapter of the American Case Management Association (ACMA), a member of the RACMonitor editorial board, and she was recognized as a “Hirsch’s Hero” by Dr. Ronald Hirsch in 2016.

She lives with her husband in Northern Illinois where they valiantly strive to raise three daughters and a son into strong, thoughtful, and self-assured individuals with a corny sense of humor.

Daniel Zirkman, MD | Secretary

Daniel M. Zirkman, MD is a graduate of Duke University in 1979 and the University of Texas Health Science Center at San Antonio, Texas where he received his medical degree in 1986.

He completed a residency in Internal Medicine and fellowship training in Nephrology at Montefiore University Hospital in Pittsburgh, Pennsylvania. Dr. Zirkman 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 also 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.

In 2012, Dr. Zirkman transitioned into the world of physician advising when he joined Executive Health Resources working as a physician advisor in the Government Appeals department handling all levels of Medicare and Medicaid denials including administrative law judge (ALJ) hearings. He joined Riverview Medical Center, part of the Hackensack-Meridian System, in Red Bank, New Jersey in 2014 assuming the position of full time physician advisor. Ultimately the call or warmer weather and less congested roadways led him to his current position as chief physician advisor at CarolinaEast Medical Center in New Bern, North Carolina. Areas of interest include clinical documentation improvement, ICD-10 implementation and concurrent status review.

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

Larry Hegland, MD, MMM | TREASURER

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.

Elizabeth Lamkin, MHA | 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 Too

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.

American College of Physician Advisors

Board of Directors

R. Phillip Baker, MD, FACOG

After completing his residency at the University Of South Carolina School Of Medicine Dr. R. Phillip Baker was the founding and managing partner in Piedmont Physicians for Women an OB/GYN practice for 32 years. He has extensive background in managed care and contracting while acting as the President of an IPA and Chairman of the Board of a regional PHO. Initially serving as a part time Physician Advisor doing mainly second level reviews took on the role as a full time Physician Advisor and Medical Director for Case Management and CDI in 2014. Responsibilities also include denials management for Self Regional Healthcare a regional hospital in Greenwood, SC. Dr. Baker serves on several committees including Co-Chair of the Finance Committee for My Health First an upstate South Carolina ACO, Corporate Compliance Committee for My Health First, Governmental Affairs Committee ACPA as well as several committees at the South Carolina Hospital Association. He was also appointed to the inaugural class of “Hirsch’s Heroes” in 2015 for his work with the process to file complaints with CMS against Medicare Advantage Plans. He joined the Board of Directors for the American College of Physician Advisors in 2017.

He has been married to Keyna for over 40 years, having asked her to marry him on their second date and resides in Greenwood, SC. One of the things they are most proud of is having raised four children to become caring and responsible adults with strong work ethics. The other is our grandchildren, who are much more fun than raising their parents.

Alvin Gore, MD

A Board-certified Family Physician with extensive experience in all aspects of Utilization Management, Dr. Alvin Gore has been performing the duties of a Physician Advisor since 2008. Having completed his training in Family Medicine at the Memorial Center in Johnstown, Pennsylvania, he has remained involved in medical education for a number of years as an Assistant Medical Director of Family Medicine Residency Program

He has been active in training Family Medicine residents and medical students, and has held academic appointments with a number of medical schools.

Dr. Gore had significant experience with both inpatient and outpatient patient management, with a particular interest in Utilization Management aspects of hospital practices. Dr. Gore has added Physician Advisors' responsibilities to his academic position at the hospital, gradually expanding his range of duties. He has become a successful liaison between the CM Department and the medical staff.

Dr. Gore subsequently accepted a full-time position as Director of Utilization Management at St. Joseph's Health in California, where he is currently responsible for the UM performance at two hospital segments of the Health System's Northern California region. He is responsible for all aspects of the Physician Advisor role including: 2nd level reviews, denial management/ALJ hearings, clinical documentation improvement projects, physician education and outreach, various LOS and cost of care reduction projects, as well as development of the local integrated delivery system.


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 served as the second President of the American College of Physician Advisors from 2016 - 2019.

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

Brian Moore

Dr. Moore completed his undergraduate training at Bucknell University, where he earned a Bachelor of Arts in Biology. He received his medical degree from Georgetown University School of Medicine. Dr. Moore completed his emergency medicine residency at Orlando Regional Healthcare System and then served in the US Air Force as an Emergency Physician at the US Air Force Academy where he was awarded with The Air Force Commendation Medal and The Air Force Achievement Medal. Dr. Moore subsequently relocated to the Charlotte suburb of Lake Norman in 2000.

Dr. Moore is Board Certified in both Emergency Medicine and as a Utilization Management / Physician Advisor. In addition to his clinical duties as an Emergency Physician over 20 years, Dr. Moore has held multiple leadership positions over his career. He served as Chief Medical Officer for a private multispecialty ED / Hospitalist group based in Charlotte, NC. He also served as the System Quality Director for a national Emergency Medicine group managing its quality program through relationships with a large regional healthcare system’s multiple Emergency Departments with collective volumes exceeding 300,000 visits annually.

Since 2014, Dr. Moore transition to a full time Physician Advisor role in the Department of Utilization Management at Carolinas Healthcare System. In 2015 he successfully completed his Board Certification in Healthcare and Quality Management (CHCQM) with an additional subspecialty Board Certification as a Physician Advisor. His daily responsibilities included completing utilization reviews for inpatient versus observation determinations, developing and performing peer to peer insurance denial interventions and leading regular medical staff education programs focusing on topics such as CMS and Commercial Insurance requirements, Clinical Documentation Improvement and denial intervention and avoidance. In 2017, Dr. Moore was appointed Medical Director for Utilization Management and Physician Advisor Services for Carolinas Healthcare System which is now Atrium Health. He provides physician leadership for 11 Primary Enterprise Hospitals and a team of 12 Physician Advisors.

Dr. Moore has been recognized as a physician leader and has served on many healthcare system level committees including the Physician IT Advisory Council, the Emergency Department Quality and Safety Executive Council, the Documentation Excellence Committee, the CHS System Denials Task Force and Revenue Cycle Integrity Committees. He is an active member of the American College of Physician Advisors (ACPA) and is chair of the Government Affairs Committee and has recently been appointed to the ACPA Board of Directors.

Dr. Moore played competitive rugby for many years but now enjoys tennis, golf and spending time outdoors. In his off time, he enjoys spending time with his family and friends and being on Lake Norman.


Dr. Bernard Ravitz is a native of Detroit, Michigan where he completed a Residency program in Internal Medicine at Mount Carmel Mercy Hospital in Detroit, Michigan. Dr. Ravitz pursued a fellowship in chemical dependency at The National Institute on Alcohol Abuse and Alcoholism in Bethesda, Maryland where he now resides. Dr. Ravitz is Board Certified with the American Board of Addiction Medicine. He practiced emergency medicine for seventeen years and is Board Certified in Emergency Medicine.

Dr. Ravitz currently serves as the physician advisor for MedStar Good Samaritan Hospital, Baltimore Maryland. President of the Medical Executive Committee, Medical Director of the Observation Unit, as well as multiple hospital and corporate MedStar Health committees.

Additionally, he is a Certified Physician Advisor in Clinical Documentation Improvement.

Erica Remer, MD, FACEP, CCDS

Dr. Erica Remer, a native New Yorker, graduated from State University of New York at Buffalo School of Medicine in 1985, and did her residency at University of Illinois Affiliated Hospitals Emergency Medicine Residency Program from 1985-1988. During a fellowship in emergency medicine administration, she developed expertise in documentation and professional fee reimbursement.

After practicing emergency medicine for 25 years, Dr. Remer became the first physician advisor at University Hospitals Health System in Cleveland, OH. She served in the role of Clinical Documentation Integrity Advisor for 4 years, training 2700 providers in ICD-10. Along her career path, she got certifications in medical coding and as a clinical documentation specialist.

Dr. Remer transitioned to independent consulting in July 2016. Although she loves helping identify documentation opportunity, her passion is educating coders, CDI specialists, and healthcare providers. She has authored numerous articles on CDI, coding, and denials, and is the co-host of Talk Ten Tuesdays, a weekly national podcast. For fun, she participates in ICD-10 Coordination and Maintenance Committee meetings.

She and her radiologist husband, Erick, reside in Beachwood, Ohio and are empty-nesters since their two sons flew the coop in August 2017.

Howard Stein, DO, MHA, CHCQM

Dr. Howard Stein is a graduate of Nova Southeastern College of Osteopathic Medicine and completed residency in Family Medicine at Union Hospital in New Jersey. He received his Master of Health Administration from the University of Maryland in 2014.

He currently serves as the Associate Director of Medical Affairs and Physician Advisor at Centrastate Medical Center in Freehold, New Jersey.

He is a board-certified Family Physician who served as an Assistant Clinical Professor of Family Medicine at Robert Wood Johnson Medical School and at the University of Medicine and Dentistry. He is board-certified by the American Board of Quality Assurance & Utilization Review Physicians.

He also served as a physician in the United States Air Force. He is married for 29 years with five children.

E.G. "Nick" Ulmer, Jr., MD, CPC

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.