Advanced Practice Providers

Enas Abuhadba, MSN, APRN, FNP-BC

Enas joined North Suffolk Cardiology in January 2025 as a board-certified Family Nurse Practitioner. She earned her Bachelor of Science in Nursing from New York University and her Master of Science in Nursing with a specialization in Family Health from Drexel University. She holds board certification through the American Nurses Credentialing Center (ANCC) and is fluent in English and Arabic.

Spencer Alvarado, MS, PA-C

Spencer joined North Suffolk Cardiology in September 2023. He received his Bachelor of Science in chemistry and biology from Loyola University and his Master of Science from the Stony Brook University Physician Assistant Program.

Spencer holds his certification with the National Commission on the Certification of Physician Assistants (NCCPA). He is also a member of the National Honor Society for Allied Health Professions – Alpha Eta.

Kathleen Callaghan, MS, RN, AGNP-C

Kathleen joined North Suffolk Cardiology in August 2023. She has a Bachelor of Science in nursing and a Master of Science in nursing with a nurse practitioner specialization from Stony Brook University. She is a member of Sigma Theta Tau Nursing Honor Society and the Golden Key International Honor Society. 

Katelyn Doherty, ANP-C

Katelyn joined North Suffolk Cardiology in November 2020. She received her Bachelor of Science in nursing at Molloy College and Master of Science in nursing at Saint Joseph’s College. Katelyn is nationally certified through the American Association of Nurse Practitioners (AANP).

Liliana Garcia, MS, APRN, FNP-C

Liliana joined North Suffolk Cardiology in November 2024, following her nearly nine-year nursing career at Stony Brook University Hospital. She received her Bachelor of Science in nursing and a Master of Science from Pace University. Liliana is nationally certified as a nurse practitioner in family health through the American Association of Nurse Practitioners (AANP) and is a member of the Sigma Theta Tau Honor Society of Nursing. She is fluent in English and Spanish.

Donna Kalenderian, BSN, MSN, ANP

Donna Kalenderian joined North Suffolk Cardiology in October 2023. She received her Master of Science in nursing at Stony Brook University and is credentialed as a cardiac device specialist through the Heart Rhythm Society. Donna has been a board-certified adult nurse practitioner (ANP) through the ANCC since 1992.

Jaclyn Kischkower, MS, APRN, AGPCNP-BC, CCRN, CNOR

Jaclyn joined North Suffolk Cardiology in November 2024.  She received her Bachelor of Science in nursing from Quinnipiac University and received her master's degree in science from Adelphi University. Jaclyn is nationally certified through the American Nurses Credentialing Center (ANCC) and is a member of the Sigma Theta Tau Honor Society of Nursing. 

Christine McIsaac, MS, PA-C

Christine joined North Suffolk Cardiology in January 2022. She received her Bachelor of Science in psychology with a minor in biology from Stony Brook University and a Master of Science from the Stony Brook University Physician Assistant Program. Christine holds her certification with the National Commission on the Certification of Physician Assistants (NCCPA).

Justin Roseman, MS, PA-C

Justin joined North Suffolk Cardiology in September 2021. He received his Bachelor of Science in health sciences with a concentration in emergency and critical care from Stony Brook University and a Master of Science from the Stony Brook University Physician Assistant Program. Justin holds his certification with the National Commission on the Certification of Physician Assistants (NCCPA)

Julianne joined North Suffolk Cardiology in February 2020. She received her Bachelor of Science in nursing and Master of Science in nursing in family medicine from Wagner College. Julianne is nationally certified through the American Nurses Credentialing Center (ANCC).  She is also a member of the International Society of Nursing – Sigma Theta Tau.