Faculty: leaders developing leaders.

Meet the leadership team of collaborative, skilled physicians who guide the internal medicine residency program at Dignity Health East Valley. Our faculty is trained to listen as thoroughly as they teach. You will see this in practice often, as faculty members engage with you and with our patient population. Faculty will take the time to answer your questions and to develop a holistic skill set in residents, from technique to bedside manner.

Program Administration

  • Allan Markus, MD, MS, MBA, FACP – Internal Medicine Residency Program Director
  • Shalini Chaliki, MD – Associate Program Director – Palliative Care and Ambulatory Medicine
  • Melanie Cloonan-Schulte, MD, FACP – Assistant Program Director – Wellness
  • Rachel Bond, MD, FACC – Assistant Program Director of Diversity, Equity and Inclusion
  • Samuel Tytler, MD, FACP – Associate PD – Medical Students
  • Tiffany Hosten-Blackmond, MD – Associate PD – Ambulatory Medicine
  • Hamlet Benyamin, MD – Director of Hospital Medicine 
  • Usha Nagin, MD – Associate PD – Hospital Medicine
  • Julie Ladwig, C-TAGME – Program Coordinator

Core Faculty

  • Osaf Ahmed, MD – Ambulatory Clinic Director  
  • Tiffany Hosten-Blackmond, MD – Ambulatory Subspecialty Director
  • Samuel Tytler, MD FACP – Ambulatory Medicine
  • Melanie Cloonan-Schulte, MD – Ambulatory Medicine
  • Devendra Wadwekar, MD – Endocrinology Subspecialty Director
  • Mike Maguire, DO – Critical Care Subspecialty Director   
  • Rachel Bond, MD – Cardiology Subspecialty Director
  • Anthony Salibi, MD – Hospital Medicine Director
  • Usha Nagin, MD – Associate PD – Hospital Medicine
  • Hamlet Benyamin, MD – Director of Hospital Medicine 
  • David Asfour, DO – Hospital Medicine
  • Fiorella Estrada, MD – Hospital Medicine
  • Patrick Pathappillil, MD – Hospital Medicine
  • Janie Goodall, DO, PsyD – Hospital Medicine

Internal Medicine Subspecialties

Ambulatory Medicine

  • Tiffany Hosten-Blackmond, MD – Associate PD – Ambulatory Medicine
  • Melanie Cloonan-Schulte, MD FACP – Ambulatory Medicine
  • Allan Markus, MD MS MBA FACP – Internal Medicine Residency Program Director
  • Philip Ku MD – Faculty, Ambulatory Medicine Selective
  • Samuel Tytler MD – Ambulatory Medicine Selective
  • Osaf Ahmed MD – Ambulatory Medicine Selective
  • Shalini Chaliki, MD – Associate PD

Cardiology

  • Nabil Dib, MD FACC – Subspecialty Director, Cardiology
  • Bashar Markabawi, MD FACC – Associate Subspecialty Director, Cardiology
  • Ahtisham Shakoor, MD – Faculty, Cardiology
  • Jaskanwal (Sonny) Bisla, MD – Faculty, Cardiology
  • Rachel Bond, MD FACC – Faculty, Cardiology
  • Sunny Jhamnani, MD – Faculty, Cardiology
  • Fady Marmoush, MD FACC – Faculty, Cardiology
  • Osama Niazi, DO – Faculty, Cardiology
  • Georges Nseir, MD – Faculty, Cardiology
  • Ashish Pershad, MD MS – Faculty, Cardiology
  • Dhaval Shah, MD MBBS FACC – Faculty, Cardiology

Critical Care

  • F. Mike Maguire, DO – Subspecialty Director, Critical Care
  • Daniel Belen, DO – Faculty, Critical Care
  • Ahmad Chebbo, MD – Faculty, Critical Care
  • Gary Nagamoto, MD – Faculty, Critical Care
  • Pedro Quiroga, MD – Faculty, Critical Care
  • Kris Roach, MD – Faculty, Critical Care
  • Jack Short, MD – Faculty, Critical Care
  • Jill Gualdoni, MD – Faculty, Critical Care

Emergency Medicine

  • Ryan Adkins, DO – Subspecialty Director, Emergency Medicine

Endocrinology

  • Devendra Wadwekar, MD – Subspecialty Director, Endocrinology
  • Mohamad Horani, MD – Faculty, Endocrinology
  • Andrea Ferenczi, MD – Faculty, Endocrinology
  • Sreedevi Reddy, MD – Faculty, Endocrinology
  • Abhilasha Singh, MBBS – Faculty, Endocrinology

Gastroenterology

  • Wael Youssef, MD – Subspecialty Director, Gastroenterology

Geriatrics

  • Talissa Adkison, MD – Subspecialty Director, Geriatrics

Hematology/Oncology

  • Azam Farooqui, MD – Subspecialty Director, Hematology/Oncology
  • Puneet Bhalla, MD – Faculty, Hematology/Oncology
  • Ian Deroeck, MD – Faculty, Hematology/Oncology
  • Neel Dharia, MD – Faculty, Hematology/Oncology
  • Anita Koszyk-Szewczyk, MD – Faculty, Hematology/Oncology
  • Kalyan Mantripragada, MD – Faculty, Hematology/Oncology
  • Sumeet Mendonca, MD – Faculty, Hematology/Oncology
  • Karen Ortiz Cruz, MD – Faculty, Hematology/Oncology
  • Luke Halbur, MD – Faculty, Hematology/Oncology
  • Sujith Kalmadi, MD – Faculty, Hematology/Oncology
  • Christopher Kellogg, MD – Faculty, Hematology/Oncology
  • Parvinderjit Singh Kahanuja, MD – Faculty, Hematology/Oncology
  • Rohit Sud, MD – Faculty, Hematology/Oncology

Infectious Disease

  • Michael Amoa-Asare, MD – Subspecialty Director, Infectious Disease
  • Madhuri Segireddy, MD – Faculty, Infectious Disease
  • Celestine Tchikounzi, DO – Faculty, Infectious Disease

Inpatient Medicine/Hospitalist

  • Usha Nagin, MD – Associate PD – Hospital Medicine
  • Hamlet Benyamin, MD – Director of Hospital Medicine 
  • Collins Appiah, MD – Faculty, Inpatient Medicine
  • Zachary Burkhart, MD – Faculty, Inpatient Medicine
  • Carmen Oliveras, MD – Faculty, Inpatient Medicine
  • Shyam Patel, MD – Faculty, Inpatient Medicine
  • Anthony Salibi, DO – Faculty, Inpatient Medicine
  • Amit Waghray, MD – Faculty, Inpatient Medicine
  • Yamine Saddouk, MD, DO – Faculty, Inpatient Medicine
  • Sher Naidoo, MD – Faculty, Inpatient Medicine
  • Ashbeel Samuel, DO – Faculty, Inpatient Medicine
  • Atika Nayeem, MD – Faculty, Inpatient Medicine
  • John Griffin, DO – Faculty, Inpatient Medicine
  • David Asfour, DO – Faculty, Inpatient Medicine
  • Fiorella Estrada, MD – Faculty, Inpatient Medicine
  • Patrick Pathappillil, MD – Faculty, Inpatient Medicine
  • Janie Goodall, DO, PsyD – Faculty, Inpatient Medicine

Nephrology

  • Clyde Mendonca, MD – Subspecialty Director, Nephrology
  • Kariappa Appachu, MD – Faculty, Nephrology
  • Rajan Kapoor, MD FASN FACP – Faculty, Nephrology
  • Divya Singh Malladi, MD – Faculty, Nephrology
  • Theodore (Teddy) Tzeremas, MD – Faculty, Nephrology

Neurology

  • Brian Beck, MD – Subspecialty Director, Neurology
  • Jon Hodgson, DO – Faculty, Neurology
  • David Salvatore, DO – Faculty, Neurology

Pulmonary and Sleep Medicine

  • Jill Gualdoni, MD – Subspecialty Director, Pulmonary/Sleep Medicine
  • Sankalp Choudhri, MD – Associate Subspecialty Director, Pulmonary/Sleep Medicine

Rheumatology

  • Amer Al-Khoudari, MD, FACR – Subspecialty Director, Rheumatology

Electives (Non-lM)

Allergy and Immunology

  • Hiral Thakrar, MD – Electives Director, Allergy and Immunology
  • Michael Manning, MD – Faculty, Allergy and Immunology

Dermatology

  • Rosemary Geary, MD – Electives Director, Dermatology
  • Ryan Falsey, MD – Faculty, Dermatology

Hospice and Palliative Care Medicine

  • Shawn Abreu, MD – Electives Director, Hospice and Palliative Medicine
  • Ned Stozberg, MD – Faculty, Hospice and Palliative Medicine
  • Shalini Chaliki, MD – Faculty, Hospice and Palliative Care

Office Gynecology and Women's Health

  • Charles Boag, MD – Electives Director, Office Gynecology & Women's Health
  • Gail Brown, WHNP – Faculty, Office Gynecology & Women's Health 

Office Ophthalmology

  • Michael Campion, MD – Electives Director, Office Ophthalmology

Orthopedic Surgery

  • Clifford Jones, MD – Electives Director, Orthopedic Surgery
  • Ammar Karim, MD – Faculty, Orthopedic Surgery

Pain Medicine

  • Karl Hurst-Wicker, MD – Pain Medicine

Physical Medicine and Rehabilitation

  • Timothy Scott Sanford, MD – Electives Director, Physical Medicine and Rehabilitation
  • Scott Kreiner, MD – Faculty, Physical Medicine and Rehabilitation

Psychiatry

  • Daniel Merrill, MD – Electives Director, Psychiatry
  • David Fife, MD – Faculty, Psychiatry

Radiology

  • Stephanie Horton, DO – Electives Director, Radiology

Young Adult Medicine

  • Thomas Eccles, DO – Electives Director, Young Adult Medicine

Non-Medical Faculty

  • Sue Espe – Library Services
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