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CTCA clinical leadership

The clinical leaders at Cancer Treatment Centers of America® (CTCA) are the visionaries who never stop searching for and providing powerful and innovative therapies to heal the whole person, improve quality of life and restore hope.

Eugene Ahn - Medical Director of Clinical Research & Hematologist/Oncologist

Eugene Ahn, MD

Enterprise Deputy Medical Director, Clinical Research

Jason Beland - Chair, CTCA Department of Radiology

Jason Beland, MD

Enterprise Chair Department of Radiology

Gary Bernstein - Chief of Surgery

Gary Bernstein, MD, FACS, MBA

Regional Chief Medical Officer

Sean Cavanaugh - Director, CTCA Genitourinary Cancer Institute

Sean Cavanaugh, MD

Enterprise Chair Department of Radiation Oncology and Genitourinary Program Director

Mashiul Chowdhury - Chief, CTCA Division of Infectious Disease, Department of Medicine

Mashiul Chowdhury, MD

Enterprise Infectious Disease Program Specialist

Pamela Crilley - Chair, CTCA Department of Medical Oncology

Pamela Crilley, DO

Enterprise Chair Department of Medical Oncology

Bruce Gershenhorn - Medical Oncologist

Bruce Gershenhorn, DO

Enterprise Lung Program Director

Medical Director of Gastroenterology and Vice Chief of Staff,  CTCA Tulsa

Scott Hendrickson, DO, FACOI

Chief of Staff,CTCA Tulsa

Jeffrey Hoag - Chief of Staff

Jeffrey Hoag, MD, MS, FCCP

Chief of Staff, CTCA Philadelphia, Enterprise Chair, Department of Medicine

Anita Johnson - Breast Surgical Oncologist

Anita Johnson, MD, FACS

Enterprise Breast Program Director

Toufic Kachaamy - Medical Director of Interventional Gastroenterology (GI),  Endoscopy and Innovation, Gastroenterologist & Advanced Endoscopist

Toufic Kachaamy, MD

Enterprise Interventional Program Specialist

Arturo Loaiza-Bonilla - Vice Chair, CTCA Department of Medical Oncology

Arturo Loaiza-Bonilla, MD, MSEd, FACP

Vice Chair, CTCA Department of Medical Oncology

Maurie Markman - Board Member and President, Medicine & Science

Maurie Markman, MD

President, Medicine and Science

Nathan Neufeld - Chief, CTCA Division of Pain Management

Nathan Neufeld, DO

Enterprise Pain/Palliative Care Program Specialist

Ankur Parikh - CTCA Medical Director of Precision Medicine

Ankur Parikh, DO

Enterprise Precision Medicine Program Director


Chevon M. Rariy, MD

Enterprise Telehealth Program Director

Patricia Rich - Medical Oncology Director, CTCA Lung Cancer Institute; Vice Chief of Staff

Patricia Rich, MD

Enterprise Lung Program Director

Julian Schink - Chief, CTCA Division of Gynecologic Oncology, Department of Surgery

Julian Schink, MD

Chief Medical Officer

Marnee Spierer - Chief of Staff & Chief of Radiation Oncology

Marnee Spierer, MD

Chief of Staff, CTCA Arizona

Bradford Tan - Chair Department of Pathology and Laboratory Medicine

Bradford Tan, MD

Chief of Staff, CTCA Chicago, Enterprise Chair, Department of Pathology & Laboratory Medicine

Director of Hospital Medicine and Chief of Staff, CTCA Tulsa

Kevin Tulipana, DO, FHM

Regional Chief Medical Officer

Alan Yahanda - Chair, CTCA Department of Surgery

Alan Yahanda, MD, FACS

Chief of Staff, CTCA Atlanta, Enterprise Chair, Department of Surgery

CTCA Leadership

Our leadership team works together to make CTCA the home of healing and hope for cancer patients and caregivers today, while also helping to develop innovating and novel approaches to cancer treatment that further tomorrow’s advances.

CTCA Leadership

Our board and advisors

Our board and advisors are the visionaries who make CTCA the home of healing and hope for cancer patients and caregivers.

Our board and advisors

Learn more about CTCA

The modern era of cancer treatment is constantly evolving, with new breakthroughs and discoveries changing the course of care at a rapid clip. At CTCA, we’re committed to bringing our patients new advances in cancer treatments.


Target: Cancer

Cancer treatment is constantly evolving. So are we.

Search clinical trials

Knowledge is power

Learning the facts about patient experiences and survival rates may help you make more informed decisions about your care.

Get treatment results

Manage your side effects

Learn how integrative care may help.

Learn more