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New Providers Join Greater Hudson Valley Health System Medical Group

The Greater Hudson Valley Health System Medical Group is pleased to announce the following new providers to its team:

Andrej Assa, MD – Hospitalist

Andrej Assa, MD - Hospitalist
Dr. Assa obtained his medical degree from State University of New York Downstate College of Medicine in Brooklyn, NY. He completed his Residency in Internal Medicine at Montefiore Medical Center in Bronx, NY. He is Board-certified in Internal Medicine.  He is fluent in Russian and Bulgarian. Dr. Assa works at Catskill Regional Medical Group in Harris, NY.

Rekha Sivadas, MD – Infectious Diseases

Rekha Sivadas, MD - Infectious Diseases
Dr. Sivadas received her medical degree from Kasturba Medical College in Karnataka, India and completed her Residency in Internal Medicine at Robert Wood Johnson University Hospital in New Brunswick, NJ. She was a Fellow of Infectious Diseases at SUNY Stony Brook University Hospital in Stony Brook, NY. Dr. Sivadas is Board-certified in Infectious Diseases. She works at Orange Regional Medical Group in the Department of Infectious Diseases.

Arielle Gelardi, AGNP-C – Trauma

Arielle Gelardi, AGNP-C - Trauma
Arielle received her Post-Master’s certificate in Adult/Gerontology Acute Care from University of Massachusetts in Boston, MA and holds a Master of Science degree from Adelphi University in Garden City, NY.  Arielle works at Orange Regional Medical Group in the Trauma Department.

Andrea Machado, FNP-BC – Post-Acute Care

Andrea Machado, FNP-BC - Post-Acute Care
Andrea received her Family Nurse Practitioner certificate from Mount St. Mary College in Newburgh, NY and holds a Master of Science degree from University of Phoenix. Ms. Machado is Board-certified as a Family Nurse Practitioner and is part of the Post-Acute Care department working primarily at Montgomery Nursing Home, Highland Rehabilitation & Nursing Center, Schervier Pavilion at St. Anthony, Glen Arden in Goshen, NY and Catskill Regional Medical Center’s Skilled Nursing Unit.

Maria Noa, FNP-BC – Urgent Care

Maria Noa, FNP-BC - Urgent Care
Maria received her Family Nurse Practitioner certificate from College of Mount St. Vincent in Bronx, NY and holds a Master of Science degree from College of Mount St. Vincent in Bronx, NY. Ms. Noa is Board-certified as a Family Nurse Practitioner and is part of the Urgent Care team at Orange Regional Medical Group in Middletown, NY and Catskill Regional Medical Group in Monticello, NY.

Jia Choi, RN, BSN, MSN – Ambulatory Clinical Coordinator

Jia Choi, RN, BSN, MSN - Ambulatory Clinical Coordinator
Jia oversees training of License Practical Nurses and Medical Assistants. She is also involved with Patient Centered Medical Home and Patient Centered Specialty Practice models. Ms. Choi has acute care experience in Emergency Services and, prior to joining the Medical Ms. Choi has her certification in ACLS, PALs, BLS, TNCC.

Antoinette De Jesus-Karellas, RN, BSN – Care Manager/Coordinator

Antoinette De Jesus-Karellas, RN, BSN - Care Manager/Coordinator
Antoinette is a graduate of SUNY Orange and Kaplan University. Ms. De Jesus-Karellas prior experience as a Nursing Supervisor and was a clinician and an educator, serving ARC of Sullivan and Orange Counties in a Day Habilitation setting. Ms. De Jesus-Karellas has vast experience in interacting and managing chronic disease among a diverse and challenging group of patients in various clinical settings.

About Orange Regional Medical Group

Orange Regional Medical Group (ORMG) is part of the Greater Hudson Valley Health System, comprised of the well-established and highly regarded Orange Regional Medical Center and Catskill Regional Medical Center. ORMG is a growing multi-specialty, hospital-supported Group with Board-certified doctors, board-certified nurse practitioners and Board-certified advanced practice professionals providing outpatient and inpatient care. The Group services Orange, Rockland, Sullivan, Ulster counties and beyond.

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About Catskill Regional Medical Group

Catskill Regional Medical Group (CRMG) is part of the Greater Hudson Valley Health System, comprised of the well-established and highly regarded Orange Regional Medical Center and Catskill Regional Medical Center. The Greater Hudson Valley Health System has been recognized by the Ethisphere Institute as one of the 2018 World’s Most Ethical Companies™.

CRMG is a growing Urgent Care, Primary Care and multi-specialty, Hospital-supported medical practice. With Board-certified Physicians, Board-certified Family Nurse Practitioners and Board-certified Advanced Practice Professionals, our staff provides outpatient care servicing Orange, Sullivan, Ulster Counties and beyond. Walk-ins are welcome and same day appointments are available at offices in Callicoon, Harris, Livingston Manor and Monticello.

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