About WNS-HealthHelp

Vision: To be a valued resource for payers and providers, ensuring the best care and outcomes for their members and patients.

Mission: HealthHelp collaborates with payers and providers to improve patient safety and deliver quality care through an evidence-based, educative, and collaborative model, focused on improving outcomes, reducing healthcare costs, and enabling the transition to value-based care.

HealthHelp, a WNS Company, is a utilization management partner that collaborates with health plan leaders and providers to improve care and realize sustained cost savings.

Our evidence-based, clinical decision support and consultative team monitors and evaluates the latest advancements in healthcare to help you deliver quality care at lower costs in a changing world.

Leadership Team

Kariena GreitenChief Executive Officer

Kariena Greiten |

Chief Executive Officer

Kariena Greiten serves as the CEO and Chairman of the Board of WNS-HealthHelp. In this role, Kariena is responsible for the strategic direction and profitable growth of WNS-HealthHelp. Most recently, Kariena was Chief Product Officer for Magellan Healthcare, where she led the product strategy for the medical specialty business, delivering solutions for health plans, health systems and employers. Prior to that, she served as Assistant Vice President of Corporate Development and of Strategic Planning and Control for CIGNA Health Services, where she was instrumental in developing strategies for the specialty healthcare and workers compensation businesses. Previous to her healthcare career, Kariena was Chief Financial Officer for TyMetrix, an early-stage technology company serving the P&C market and as Vice President with the Bank of America, facilitating equity and debt financing for the technology and financial services industries. Kariena has a Bachelor of Arts degree in Economics from Colby College and an MBA in Finance from The Wharton School, University of Pennsylvania.

Ronald Lopez, MDChief Medical Officer

Ronald Lopez, MD |

Chief Medical Officer

Dr. Ronald Lopez serves as the Chief Medical Officer of WNS-HealthHelp. Dr. Lopez is a seasoned physician executive with over 10 years of managed care experience. His experience includes Medicaid and Medicare program coverage and payment, value-based contract design and implementation, HEDIS metric design, health plan clinical leadership, utilization operations and process management, population disease management, and quality management and metrics expertise. Dr. Lopez holds a Doctorate of Medicine from the University of California at San Diego.

Mark ConroyChief Information Officer

Mark Conroy |

Chief Information Officer

Mark Conroy has over thirty-five years of engineering experience in providing high-technology solutions utilizing a very diverse background in both computer hardware and software disciplines. Having spent the last 28 years working exclusively for start-up companies, Mark has keen insight into navigating the Information Technology landscape and arriving at the most cost-effective and risk-mitigated engineering solutions. During his 15-year tenure at HealthHelp, he has built an information technology platform that is innovative, secure and robust. Prior to joining HealthHelp, Mr. Conroy co-founded ESX Engineering where he served as vice president of a fast-paced health-care and Internet-oriented information technology consulting firm. Prior to Joining ESX, Mr. Conroy served as the director of Software Development and Engineering for Physix, a leading provider of physician-workflow software. Mr. Conroy is native to the Houston, Texas, area where he attended the University of Houston College of Technology.

Todd SabathChief Development Officer

Todd Sabath |

Chief Development Officer

Todd Sabath serves as the Chief Development Officer of WNS-HealthHelp. In this role, Todd is responsible for all business development, client services and revenue operations. Prior to WNS, Todd held various leadership positions at Optum, Exela Technologies, and Medical Mutual.

Laticia MillerSenior Vice President, Strategic Transformation

Laticia Miller |

Senior Vice President, Strategic Transformation

Laticia Miller serves as the SVP, Strategic Transformation of WNS-HealthHelp. In this role, Laticia is responsible for ongoing performance management and continuous improvement initiatives. Laticia has earned a Master Black Belt in Six Sigma and is an expert in process transformation, redesign, and growing multiple start-up organizations. In the industry, she has contributed through her leadership efforts with the HIMSS ME-PI Committee and Innovation Pathways working group.

Adrienne JacobsVice President, Human Resources

Adrienne Jacobs |

Vice President, Human Resources

Adrienne Jacobs serves as Vice President, Human Resources for WNS-HealthHelp. Adrienne is an accomplished HR professional with experience building effective “people processes” for growth companies. Over the years, she has earned the reputation of being able to attract quality talent, build great corporate cultures, and foster uncommonly high levels of employee engagement and retention. She has a B.S. Degree in Business Administration (HR Management Concentration), from the New York Institute of Technology and the Senior Professional in Human Resources (SPHR) Certification from the HR Certification Institute.

Om SinghCorporate VP - Finance

Om Singh |

Corporate VP - Finance

Om Singh (OP) is global finance controller for WNS. He leads the international locations finance & accounting function for WNS, spread across multi-locations in China, Philippines, Sri Lanka, South Africa, Romania, Poland, Spain, Turkey and UK in Europe, Costa Rica and North America. He also Heads Finance for HealthHelp and Denali acquired entities of WNS. OP is Chartered Accountant & Cost Accountant by training. OP has decades of experience at senior finance leadership role across geographies. Prior to joining WNS he was leading finance for Zavata Inc (now acquired by Southerland). Prior to Zavata he worked with HeroITES a Hero Honda Group Company, BPL Limited and The Associated Cement Companies Limited at various locations across India.

Prachi Sachdeva, PhDVice President, Healthcare Informatics

Prachi Sachdeva, PhD |

Vice President, Healthcare Informatics

Prachi Sachdeva, serves as Vice President, Healthcare Informatics of WNS-HealthHelp. In this role, Prachi is responsible for the informatics strategy, pricing and customer reporting functions across all business and services lines. Prachi is a seasoned Health Care Executive with over two decades of experience and holds a demonstrated track record of achievements in risk and financial analysis, business intelligence, and medical analytics. Prior to WNS-HealthHelp, Prachi donned various leadership roles at the Health Care Service Corporation across divisions, including Actuarial, Analytics, Financial Planning and Analysis, and Government Programs. Prachi received her master’s degree and a Doctorate in Statistics from the University of California in Santa Barbara, a master’s degree in Mathematics with a specialization in Computer Science from the Indian Institute of Technology, and a bachelor’s degree in Mathematics and Statistics from the University of Bombay.

Medical Team

Anthony DeFrance, MDMedical Director of Cardiology

Anthony DeFrance, MD |

Medical Director of Cardiology

Dr. DeFrance has a unique background including clinical interventional cardiologist, chief medical officer, educator, outcomes researcher and entrepreneur. He has expertise in appropriate utilization of technology in medicine, healthcare economics, value based metrics, and educational design and delivery. Dr. DeFrance is currently the Medical Director of Cardiology for HealthHelp. He has worked with HealthHelp for over ten years at one point serving as chief medical officer. In these capacities he has led large teams of healthcare professionals in writing evidence based appropriate care guidelines and rule sets which improve the quality and safety of medicine for over 20 million people in the US while also creating sustained savings in healthcare. He has also designed clinical decision support systems that are currently in use helping to improve patient care. In 2018 Dr. DeFrance founded MedMentor, an education company that provides state of the art CME content using the latest in eLearning science and online delivery platforms. Dr. DeFrance is also the founder and President of Digimedica, a consulting and educational design and delivery company for healthcare professionals, hospitals, and universities. He is passionate about creating systems to optimize knowledge transfer and has won numerous awards for teaching excellence during his career. He is an expert in cardiovascular CT imaging and has taught more than 3,000 physicians how to perform and interpret cardiac CT nationally and internationally and has lectured extensively on this subject. Dr. DeFrance has a stellar reputation in the medical field and continues work to improve the quality and safety of patient care in the US.

Jon D. Shanser, MD, FACRMedical Director of Clinical Services

Jon D. Shanser, MD, FACR |

Medical Director of Clinical Services

Dr. Shanser is a board certified Diagnostic Radiologist who practiced with Bay Area Radiologists in San Francisco from 1981 to 2009 and subsequently at the Reno Diagnostic Center in Reno, Nevada. Through his four-decade career, he served as an Assistant Clinical Professor of Radiology at the University of California San Francisco (UCSF), and he has held leadership positions in both the American College of Radiology (ACR) and California Radiological Society (CRS). He was the Chairman of the ACR Coding and Nomenclature Committee as well as Chairman of the ACR Regulatory Compliance Task Force. He also was President of the CRS, for which he still serves on the Executive Committee and as a Councilor to the ACR. He is a member of both the Radiological Society of North America(RSNA) and the American Roentgen Ray Society(ARRS) and regularly attends both of their national meetings. He is currently licensed in both California and Nevada.

Amin J. Mirhadi, MDMedical Director for Integrative Oncology

Amin J. Mirhadi, MD |

Medical Director for Integrative Oncology

Dr. Amin Mirhadi is a board-certified Radiation Oncologist, who currently serves as a Faculty Physician at Cedars-Sinai Medical Center, in the Department of Radiation Oncology and the the Samuel Oschin Cancer Center. His primary clinical and research interests include breast cancer, lung cancer, and brain tumors, with an emphasis on utilizing techniques which deliver minimal amounts of radiation to the surrounding normal tissue, such as Image Guided Radiosurgery, Optical Surface Tracking and various other motion management techniques. Dr. Mirhadi has published several articles in prestigious journals and has written 5 chapters for widely used textbooks. At Cedars-Sinai, Dr. Mirhadi has focused his research and departmental development efforts on enhanced localization techniques, an aspect of Radiation Oncology that allows for more precisely guided radiation therapy. He has also served as the medical director for oncology services for HealthHelp since 2012. During his tenure here, he is over seen the development and refinement of all of the cancer related programs including radiation oncology, medical oncology, cancer imaging and various surgical and biopsy programs. In addition, he has cultivated and developed a Virtual Tumor Board program which has been instrumental in providing a better connection between the provider community and review physicians and is the first of its kind in the area of cancer management.

Harbinder Chadha, MDMedical Director of Musculoskeletal Services

Harbinder Chadha, MD |

Medical Director of Musculoskeletal Services

Dr. Harbinder Chadha is an orthopaedic surgeon affiliated with Sharp Chula Vista Medical Center and Scripps Mercy Hospital. He holds certification from the American Board of Orthopaedic Surgery and is a member of professional organizations including the American Medical Association, the American Academy of Orthopaedic Surgery, the Western Orthopaedic Association and the California Medical Association. For his undergraduate degree, Dr. Chadha attended Alma College, graduating summa cum laude. He pursued his medical degree at the Wayne State University School of Medicine. Dr. Chadha completed his residency training at the university’s Department of Orthopaedic Surgery, followed by a fellowship program in adult reconstruction at Scripps Clinic and Research Foundation.

Ulysses Magalang, MDMedical Director of Sleep

Ulysses Magalang, MD |

Medical Director of Sleep

Dr. Ulysses Magalang, MD is a practicing Pulmonary Disease and Sleep Medicine Specialist in Columbus, OH. He has been in practice for more than 22 years. Dr. Magalang is board-certified in Pulmonary, Critical Care, and Sleep Medicine. He has published more than 50 scholarly articles including original manuscripts in major journals in his field. Dr. Magalang has been actively involved in an international consortium of sleep medicine researchers- the Sleep Apnea Global Interdisciplinary Consortium (SAGIC), a collaborative group comprised of international experts in the field of sleep medicine.

Pranshu Sharma, MD Medical Director of Diagnostic Imaging Services

Pranshu Sharma, MD |

Medical Director of Diagnostic Imaging Services

Dr. Pranshu Sharma is a Diagnostic Radiology specialist in Philadelphia, Pennsylvania. Dr. Sharma was board certified by the American Board of Diagnostic Radiology. He attended and graduated from medical school in 1992, having over 28 years of diverse experience, especially in Diagnostic Radiology. He is affiliated with Thomas Jefferson University Hospital and Methodist Hospital.

Ali Mahtabifard, MDMedical Director of Oncology Surgical Services and Endoscopic Services

Ali Mahtabifard, MD |

Medical Director of Oncology Surgical Services and Endoscopic Services

Dr. Mahtabifard obtained his B.A. degree from University of California at Berkeley, CA and his M.D. from New York Medical College, Valhalla, NY. He had his Internship and Residency in General Surgery at the St. Vincent's Hospital and Medical Center affiliated with New York Medical College, NY. Following a two year Research Fellowship in Thoracic Surgery at the Memorial Sloane-Kettering Cancer Center, Cornell University, New York, NY, Dr. Mahtabifard did a residency in General Surgery at the Massachusetts General Hospital, Harvard University, Boston, MA. After a two year of Residency in Cardiothoracic Surgery at University of California at Davis, Sacramento, CA and a year of Fellowship in Advanced Thoracic and Video Assisted Thoracic Surgery at Cedars-Sinai Medical Center in Los Angeles, CA, Dr. Mahtabifard settled down in Private Practice of Thoracic Surgery in Beverly Hills, CA. He is also the current Clinical Chief of Thoracic Surgery at Cedars-Sinai Medical Center.

HealthHelp Careers

HealthHelp Careers

We are always eager to expand the HealthHelp family and invite passionate and driven people to take advantage of available career opportunities.

Join The Team