The DTDS Foundation supports research and provides resources for families affected by dopamine transporter deficiency syndrome (DTDS), a rare movement disorder.

This organization supports children with DYRK1A Syndrome and their families, providing resources and advocacy for those affected by this condition.

The Dana Foundation focuses on advancing neuroscience to address societal challenges and enhance well-being through collaborative research and public engagement.

The Dancing Eye Syndrome Support Trust provides support and information to families of children with Opsoclonus-myoclonus ataxia syndrome (OMAS), facilitating community connections and raising awareness about this rare autoimmune condition.

The Dandy-Walker Alliance is dedicated to serving and supporting individuals affected by Dandy-Walker Malformation, providing resources, education, and community support.

Danny's Dose advocates for specialized emergency care for individuals with bleeding disorders, providing resources and guidelines to improve treatment and care in emergency situations.

The Danon Foundation is a resource for individuals affected by Danon Disease, providing information and community support for this rare genetic condition.

The Dattoli Cancer Foundation provides information, support, and resources for individuals affected by prostate cancer, aiming to raise awareness and foster research for better diagnostic tools and treatment options.

Cleveland Clinic is a leading academic medical center that provides comprehensive healthcare services, focusing on patient-centered care and innovative treatments across various diseases and conditions.

DEBRA UK is a patient support organization for individuals affected by epidermolysis bullosa (EB), providing practical, emotional, and financial support, as well as funding research into treatments and cures for EB.

Defeat MSA Alliance is a charity organization dedicated to supporting patients with Multiple System Atrophy (MSA) through education, advocacy, and funding research for effective treatments.

The Degos Disease Foundation supports patients affected by Degos disease, providing resources, advocacy, and information for patients, families, and healthcare professionals.

The Described and Captioned Media Program provides accessible educational videos and teaching tools for families and educators of students with disabilities, focusing on enhancing learning through captioning, audio description, and American Sign Language.

The Desmoid Tumor Research Foundation is dedicated to advancing research, advocacy, awareness, and support for patients with desmoid tumors, aiming to find more treatments and ultimately a cure.

Diabetes New Zealand is a Charitable Trust that supports people living with diabetes by providing information and resources to help manage diabetes symptoms and ensure equitable access to quality diabetes care and education.

Diabetes UK is a charity that supports individuals affected by diabetes through education, research funding, and community support services.

The Diann Shaddox Foundation advocates for individuals affected by Essential Tremor, focusing on research for new therapies and a cure while promoting awareness and support within the community.

The Health and Medicine Counsel supports healthcare and health education organizations by providing advocacy, treatment development, and public policy guidance.

The Disability Law Center is a non-profit organization that advocates for the legal rights and opportunities of individuals with disabilities in Utah, providing services related to accessibility, community living, education, employment, and more.