Charter Member Societies
- American Society for Clinical Pathology (ASCP)
- American Society for Investigative Pathology (ASIP)
- Association of Pathology Chairs (APC)
- College of American Pathologists (CAP)
- United States and Canadian Academy of Pathology (USCAP)
Associate Member Societies
- Academy of Clinical Laboratory Physicians and Scientists (ACLPS)
- American Academy of Oral & Maxillofacial Pathology (AAOMP)
- American Association for Neuropathologists (AANP)
- American Board of Oral and Maxillofacial Pathology (ABOMP)
- American Board of Pathology (ABP)
- American College of Veterinary Pathologists (ACVP)
- American Society of Cytopathology (ASC)
- Association For Molecular Pathology (AMP)
- Association of Clinical Scientists
- Association of Directors of Anatomic and Surgical Pathology (ADASP)
- Canadian Association of Pathologists (CAP/ACP)
- National Association of Medical Examiners (NAME)
- Papanicolaou Society of Cytopathology (PSC)
- Society for Pediatric Pathology (SPP)
