Erin Horstman, MD
Assistant Professor of Laboratory MedicineCards
Additional Titles
Associate Director , Blood Bank and Apheresis
Associate Residency Program Director, Pathology
Contact Info
Education
University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, Medicine (2015)
Rochester Institute of Technology, Biomedical Sciences (2010)
Additional Titles
Associate Director , Blood Bank and Apheresis
Associate Residency Program Director, Pathology
Contact Info
Education
University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, Medicine (2015)
Rochester Institute of Technology, Biomedical Sciences (2010)
Additional Titles
Associate Director , Blood Bank and Apheresis
Associate Residency Program Director, Pathology
Contact Info
Education
University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, Medicine (2015)
Rochester Institute of Technology, Biomedical Sciences (2010)
About
Copy Link
Titles
Assistant Professor of Laboratory Medicine
Associate Director , Blood Bank and Apheresis; Associate Residency Program Director, Pathology
Appointments
Laboratory Medicine
Assistant ProfessorPrimary
Other Departments & Organizations
Education & Training
- Fellow
- Yale University (2023)
- Fellow
- Yale University (2022)
- Resident, AP/CP
- University at Buffalo (2020)
- Chief Resident
- University at Buffalo (2020)
- Categorical Resident
- University at Buffalo (2016)
- MD
- University at Buffalo, Jacobs School of Medicine and Biomedical Sciences, Medicine (2015)
- BS
- Rochester Institute of Technology, Biomedical Sciences (2010)
Research
Copy Link
Research at a Glance
Yale Co-Authors
Christopher Tormey, MD
Nataliya Sostin, MD, MCR
Publications
Featured Publications
How Immigration Policy Threatens US Medical Training and Patient Care: A Fragile Pipeline.
Jacobs JW, Wheeler AP, Horstman E, Booth GS. How Immigration Policy Threatens US Medical Training and Patient Care: A Fragile Pipeline. JAMA 2025 PMID: 40489315, DOI: 10.1001/jama.2025.9782.Peer-Reviewed Case Reports and Technical Notes
2025
Immigration Enforcement Tactics and Systemic Health Harms: The Ethical Imperative for Medical Advocacy.
Jacobs JW, Bibb LA, Gutierrez JR, Allan JM, Horstman E, Landry AI, Martin AA, Shelton KM, Wheeler AP. Immigration Enforcement Tactics and Systemic Health Harms: The Ethical Imperative for Medical Advocacy. Ann Intern Med 2025, 178: 1793-1795. PMID: 41144968, DOI: 10.7326/ANNALS-25-03151.Peer-Reviewed Case Reports and Technical NotesWhy auto-anti-D might be more likely than allo-anti-D for people with conventional D type
Yurtsever, N., Liu, J., Hidalgo Cedeno, E., Tormey, C.A., Denomme, G. and Horstman, E. (2025), Why auto-anti-D might be more likely than allo-anti-D for people with conventional D type. Br J Haematol. https://doi.org/10.1111/bjh.70081Peer-Reviewed Original Research
2022
Incidental Discovery of a Patient with the Bombay Phenotype
Jacobs JW, Horstman E, Gisriel SD, Tormey CA, Sostin N. Incidental Discovery of a Patient with the Bombay Phenotype. Lab Medicine 2022, 54: e14-e17. PMID: 35776424, DOI: 10.1093/labmed/lmac075.Peer-Reviewed Case Reports and Technical NotesCitationsAltmetricMeSH Keywords and ConceptsConceptsRed blood cellsH antigensIncidental discoveryAcute hemolytic transfusion reactionBombay phenotypeHemolytic transfusion reactionsAmerican hospital systemRare blood typesTransfusion reactionsCompatible bloodB antigensBlood typeAntigenBlood cellsHospital systemABO phenotypingBlood phenotypeABO systemPatientsPara-Bombay phenotypeType OH deficiencyPhenotypeIll effectsIndividualsPlasma Products for Transfusion: An Overview
Horstman EE, Tormey CA. Plasma products for transfusion: an overview. Ann Blood 2022;7:4.Peer-Reviewed Educational Materials
Academic Achievements & Community Involvement
Copy Link
Activities
activity Transfusion, AABB
08/02/2021 - PresentJournal ServiceReviewerDetailsReview manuscripts submitted to the AABB journal "Transfusion"activity AABB (Association for the Advancement of Blood & Biotherapies)
07/02/2018 - PresentProfessional OrganizationsMemberactivity ASCP (American Society for Clinical Pathology)
10/01/2020 - PresentProfessional OrganizationsMemberactivity CAP (College of American Pathologists)
10/28/2017 - PresentProfessional OrganizationsMemberactivity ASFA (American Society for Apheresis)
07/02/2021 - PresentProfessional OrganizationsMember
Honors
honor Resident Teaching Award
06/13/2024Yale School of Medicine AwardLaboratory Medicine Residency ProgramDetailsUnited Stateshonor Dr. Howard R. Goldstein '74 Memorial Humanitarian Scholarship
06/15/2015Regional AwardGold Humanism Honor Society, University at Buffalo ChapterDetailsUnited States
Teaching & Mentoring
Copy Link
Teaching
Didactic Clinical Medicine I - PA2250
LecturerLecture SettingDetails9/1/2025 - PresentForGraduate2 Average Instructional Hours Per YearHematology for PA students
Didactic Genes and Development
LecturerLecture SettingDetails10/1/2025 - PresentForGraduate4 Average Instructional Hours Per YearThe Genes and Development course begins with an introduction to foundational genetics principles. Students gain an understanding of how the genome is organized and controls all cellular processes within our cells, the clinical significance of genetic variation among individuals, the available DNA diagnostic tools, and how these tools are utilized in the diagnosis and management of disease. The course then transitions to embryology, presenting how the program for human development is controlled and how deregulation of this program results in birth defects. Students are then introduced to the field of clinical genetics and have the opportunity to apply their genetics knowledge as they learn about common genetic disorders affecting children and adults. This is followed by an overview of the first organ system in the curriculum, the hematologic system. This introduction to benign hematology serves as a foundation for the second part of the course, which focuses on cancer, starting with cancer biology and pathology. In this portion of the course, students are introduced to the types of genetic changes that occur in somatic cells and enable tumorigenesis. Cancer biology and principles of neoplasia are integrated with developmental genetics and embryology, with students gaining an appreciation of neoplasia as a genetically-based aberration of normal development and cellular regulation. This knowledge is further expanded as the students learn malignant hematology before moving on to learning about solid tumors. The course incorporates cancer pharmacology and clinical aspects of drug development and concludes with a broad introduction to the clinical oncology discipline.
Didactic MD 1075: Attacks and Defenses
LecturerLecture SettingDetails12/1/2023 - PresentForGraduate3 Average Instructional Hours Per YearAttacks and Defenses introduces principles of immunity, tissue injury and repair and medical microbiology. These principles are integrated with the clinical fields of clinical immunology and allergy, infectious diseases, dermatology and rheumatology. Students are introduced to the prevention, diagnosis, and management of infectious, allergic, autoimmune and immune deficiency related diseases. Selected examples of immune based neoplastic therapy especially with respect to melanoma. Medical microbiology and infectious disease are taught during the entire course. Principles of immunobiology are taught concurrently with clinical immunology, followed by rheumatology and then dermatology. Understanding disease in underserved and diverse populations is a critical component of the course.
Clinical Medical Approach to the Patient (MAP) Integrated Clerkship Block
LecturerInpatient Clinical SettingDetails11/1/2022 - PresentForGraduate3 Average Instructional Hours Per YearMedical Approach to the Patient (MAP) is a 12-week integrated clerkship block that is comprised of Internal Medicine and Neurology rotations. The course is structured to give clerkship students in-depth experience with the diagnosis and management of adult medical issues. Because of the significant clinical overlap between internal medicine and neurology, these two components are combined to form the MAP experience. Students will rotate through eight weeks of internal medicine and four weeks of neurology during their MAP experience. In addition to rotation-specific didactics, students will attend the “Top Ten” series of didactics throughout their MAP block, covering common chief complaints that encompass diagnoses specific to internal medicine and neurology.
Didactic Resident Lectures
LecturerLecture SettingDetails9/1/2022 - PresentForHouse Staff12 Average Instructional Hours Per Year
Clinical Care
Copy Link
Overview
Erin Horstman, MD, a specialist in laboratory medicine and hematopathology, focuses on diagnosing and managing conditions involving blood cells, bone marrow, and lymph nodes. She works to identify complex diseases by analyzing tissue and blood samples, helping guide treatment decisions for various blood-related disorders.
Dr. Horstman uses a range of laboratory methods to ensure timely and accurate diagnoses. As an assistant professor at Yale School of Medicine, she pursues research aimed at refining transfusion practices and improving diagnostic techniques for patients with hematologic disorders.
Dr. Horstman completed her medical training at the University at Buffalo Jacobs School of Medicine and Biomedical Sciences, followed by residency in pathology and fellowships in hematopathology and transfusion medicine at Yale School of Medicine.
Clinical Specialties
Board Certifications
Blood Banking Transfusion Medicine
- Certification Organization
- AB of Pathology
- Original Certification Date
- 2023
Hematology (Pathology)
- Certification Organization
- AB of Pathology
- Original Certification Date
- 2023
Anatomic & Clinical Pathology
- Certification Organization
- AB of Pathology
- Original Certification Date
- 2020
Are You a Patient?
View this doctor's clinical profile on the Yale Medicine website for information about the services we offer and making an appointment.
View Doctor ProfileGet In Touch
Copy Link
Contacts
Locations
55 Park Street
Academic Office
New Haven, CT 06511