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Program Director

Mitchell S. Cairo, MD 

Clinical Director

Jessica Hochberg, MD 

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HCM Brochure


Primary Immunodeficiencies

Primary Immunodeficiencies

The Childhood Primary Immunodeficiency Program at the Maria Fareri Children’s Hospital at Westchester Medical Center and New York Medical College is a multidisciplinary and comprehensive program dedicated to the diagnosis, prevention, treatment and long-term follow up of children diagnosed with primary immunodeficiency syndromes. The program consists of several “state of the art” programs in Newborn Screening, Prevention, Genetic Diagnosis, Stem Cell Transplantation, Reduced Intensity Conditioning and Adoptive Cellular Immunotherapy. The program also provides a unique opportunity for clinical, translational and basic research for students, residents, and fellows focused on the biology and treatment of primary immunodeficiency in children. Most importantly, the program is designed to provide customized and personal care and long-term follow-up to each child with a primary immunodeficiency. The program is one of 43 centers in North America participating in the National Institutes of Health-funded Primary Immunodeficiency Treatment Consortium. Learn more.

The Primary Immunodeficiency Program is focused on all known immunodeficiencies [Our Clinical Trials, Patient Information], including:

Research and Education Highlights

  • ACGME Accredited Pediatric Hematology, Oncology, and Stem Cell Transplantation Fellowship
  • Member of the Primary Immune Deficiency Treatment Consortium (PIDTC)
  • Student and Resident elective/selectives
  • NYS Newborn screening
  • Comprehensive Genetic Diagnostics
  • Reduced Intensity Conditioning and Allogeneic Stem Cell Transplantation
  • Targeted Cellular Therapeutics

Unique Features

  • Comprehensive Genetic Diagnostic Program
  • Genetic Consulting
  • Targeted Immunotherapy
  • Novel Therapeutics
  • Blood and Marrow Transplantation
  • Unrelated Cord Blood Stem Cell Transplantation
  • Unrelated Adult Donor Stem Cell Transplantation
  • Haploidentical Stem Cell Transplantation
  • T-cell Depletion and Stem Cell Selection Transplantation
  • Reduced Intensity Conditioning Therapy
  • HEPA-filtered and Positive Pressure Protected Isolation Room
  • Cellular and Tissue Engineering Laboratory
  • Multidisciplinary Team
  • Donor Lymphocyte Infusions        

Contact Us

Pediatric Hematology, Oncology and Stem Cell Transplant
Maria Fareri Children’s Hospital
100 Woods Road
Valhalla, NY 10595

Allyson Flower, MD

Edo Schaefer, MD

Emily Thatcher, PA-C

By Car


Maria Fareri Children’s Hospital is served by Metro North's Harlem line via two stations:

  • White Plains - Bus transfer options available
  • Hawthorne - Taxi service available For train fare and schedule information, call 1-800-METRO-INFO or go to METRO NORTH


There are three bus lines (Westchester Bee Line) you can take to our campus. Please call 914.813.7777 for bus routes and fares.

Campus Map

The Westchester Medical Center campus includes the Maria Fareri Children's Hospital and the Behavioral Health Center.

Cairo, Mitchell S., MD
Mitchell Cairo, MD

Chief, Pediatric Hematology, Oncology and Stem Cell Transplantation;
Director, Childhood and Adolescent Cancer and Blood Diseases Center
  • Pediatrics, Pediatric Hematology-Oncology
Flower, Allyson M., MD
Allyson Flower, MD

Assistant Professor of Pediatrics and Microbiology, Immunology,
Clinical Director, Pediatric Stem Cell and Cell Transplant Program
  • Pediatrics, Pediatric Hematology-Oncology
Schaefer, Edo, MD
Edo Schaefer, MD
Assistant Professor, New York Medical College
  • Pediatrics, Pediatric Hematology-Oncology
Siegel, Subhadra A., MD
Subhadra Siegel, MD

Director of Allergy and Immunology,
Division of Pediatric Pulmonology, Allergy and Immunology and Sleep Medicine,
Boston Children's Health Physicians,
New York Medical College
  • Pediatrics, Pediatric Pulmonology


NP Coordinators

Isabel Gonzalez, RN, MS, CPNP-PC

Megan Campbell, FNP-C


Emily Thatcher, PA-C