Senior Leadership

Meet our senior leadership:

Paul R. Rosenstock

Paul R. Rosenstock, M.D.

CEO and Medical Director

Dr. Rosenstock has been a practicing internist for over 30 years.  He has held numerous successful senior management positions including Medical Director for Sephardic Home for Nursing and Rehabilitation, MedNet HealthCare Group, and CEO for Brooklyn Health Partners.

Charlotte Punski, RN, PA, MPH

Senior Vice President, Strategic Planning and Business Development

Charlotte Punski has over 25 years of clinical and management experience focusing on business development, homecare, provider, and network extension. Past work experience includes Oxford Health Plans, Merck Medco Containment, and several large Certified Home Care Agencies in New York City. Charlotte has implemented a successful after hospital care program with several major New York City HMO’s. Charlotte also plays an active role in the Medicare demonstration program “Independence at Home” geared to improve elderly homebound patients clinical outcomes, patient satisfaction at lower costs.

Herald Simon

Herold Simon, MD

Sr. Medical Consultant

Herold Simon, MD, is the Senior Medical Director. He attended Universidad del Noreste and completed residency training in Internal Medicine at Lincoln Hospital Center as well as Fellowship in Nephrology at Montefiore Medical Center/Albert Einstein College of Medicine. He is the author of many publications on Kidney Pathobiology and Healthcare. He provides clinical oversight and administrative services to our providers. He has over twenty years of leadership experience that supports excellence in medical practice. As founder and chairperson of the Aesclepius Medical Society, Dr. Simon has been involved in multiple health-related missions in Haiti. Dr. Simon was among the first responders to provide urgent care to affected individuals following the massive earthquake that devastated Haiti in 2010, including delivery of a baby in an emergent situation. Dr. Simon is very well known and has been awarded a number of times for his dedication to community service. He is also a published poet.

Mark Braun

Director of Revenue Cycle Management

With 11 years experience in the healthcare industry, Mark Braun’s expertise lies in business management and development, as well as revenue cycle management for Article 28 facilities, Hospitals, Urgent Care Facilities, and General Physician Practices.

At Doctors On Call, he is responsible for optimizing revenue and core workflow processes and identifying missed revenue opportunities. His mission is to guide the functions that support the goals of the organization and to ensure the continuance of quality and excellence at Doctors On Call.