Rare Diseases
All people with rare diseases deserve accurate diagnosis, effective treatment, and access to knowledgeable care — regardless of how uncommon their condition is. This page centers the expertise of people navigating life with rare diseases, including the diagnostic odyssey, limited specialist access, and the challenge of finding community when few share your condition.
A rare disease is typically defined as affecting fewer than 200,000 people in the United States (or similar thresholds in other countries). But while each rare disease is uncommon, rare diseases collectively affect an estimated 300-400 million people worldwide. You are not alone.
Understanding Rare Disease
Section titled “Understanding Rare Disease”What Makes a Disease “Rare”?
Section titled “What Makes a Disease “Rare”?”Definitions vary by country:
- United States: Fewer than 200,000 people affected
- European Union: Fewer than 1 in 2,000 people
- Japan: Fewer than 50,000 people
There are thousands of rare diseases: Over 7,000 identified rare diseases exist. New ones are still being discovered and described.
Many are genetic: About 80% of rare diseases have genetic origins.
Most are chronic and serious: Rare diseases are often lifelong, progressive, and significantly impact quality of life.
The Paradox of Rare Disease
Section titled “The Paradox of Rare Disease”Each rare disease is uncommon. But collectively:
- Rare diseases affect ~10% of the population
- More people have rare diseases than have cancer
- Most people know someone with a rare disease
Yet research, treatment, and awareness remain limited for most conditions.
The Diagnostic Odyssey
Section titled “The Diagnostic Odyssey”What Is the Diagnostic Odyssey?
Section titled “What Is the Diagnostic Odyssey?”Many people with rare diseases spend years — sometimes decades — seeking a diagnosis. This is called the “diagnostic odyssey.”
Average time to diagnosis: 5-7 years for many rare diseases; some take much longer.
Number of doctors seen: Often 7-8 or more before correct diagnosis.
Misdiagnoses: Common; may be told symptoms are psychosomatic, “just anxiety,” or attributed to common conditions.
Why Diagnosis Takes So Long
Section titled “Why Diagnosis Takes So Long”Limited awareness: Many doctors have never seen or learned about your condition.
Unusual symptoms: Symptoms may not fit textbook presentations.
Rarity itself: Doctors may not consider rare possibilities.
Dismissal: Symptoms may be minimized or not believed.
Healthcare access: Not everyone can see specialists or access advanced testing.
Diagnostic testing limitations: Tests may not exist or be available for all rare conditions.
Strategies for Getting Diagnosed
Section titled “Strategies for Getting Diagnosed”Document everything: Track symptoms, timeline, what makes things better/worse. Bring written summaries to appointments.
Research your symptoms: You may find possibilities doctors haven’t considered. Approaching this carefully can help discussions.
Request referrals to specialists: Academic medical centers, rare disease centers, geneticists.
Genetic testing: Many rare diseases can be identified through genetic testing. Ask about testing options.
Undiagnosed disease programs: Some exist for people who remain undiagnosed (NIH Undiagnosed Diseases Program in US, similar programs elsewhere).
Find others with similar symptoms: Online communities may help identify possibilities.
Don’t give up: Many people eventually get diagnosed, even after years.
Living Without a Diagnosis
Section titled “Living Without a Diagnosis”Some people never receive a specific diagnosis. This is valid and you still deserve care:
You can still:
- Receive treatment for symptoms
- Request accommodations
- Access benefits (based on functional limitations, not just diagnosis)
- Find community (undiagnosed groups exist)
“Without a diagnosis” doesn’t mean:
- Your symptoms aren’t real
- You don’t deserve help
- You’re not disabled
See Invisible Disabilities for related experiences.
Living with a Rare Disease
Section titled “Living with a Rare Disease”Finding Knowledgeable Care
Section titled “Finding Knowledgeable Care”The challenge: Most doctors know little about your condition. You may know more than your physicians.
Strategies:
- Seek specialists with experience in your condition (may require travel)
- Academic medical centers and teaching hospitals
- Centers of Excellence designated for some conditions
- International experts (telemedicine can help)
- Educate your local providers (share current research)
Being your own expert: Many rare disease patients become deeply knowledgeable about their conditions. This is a strength, not a problem.
Limited Treatment Options
Section titled “Limited Treatment Options”Reality: Many rare diseases have no approved treatments or cures.
What exists:
- Symptom management (even without disease-specific treatment)
- Off-label use of medications approved for other conditions
- Clinical trials (when available)
- Orphan drugs (medications developed specifically for rare diseases)
Orphan Drug Act (US): Provides incentives for developing rare disease treatments. Similar programs exist in EU and elsewhere.
Right to Try (US): Allows access to experimental treatments in some cases.
Compassionate use/Expanded access: Programs to access unapproved drugs outside clinical trials.
Managing Uncertainty
Section titled “Managing Uncertainty”Not knowing what to expect: Many rare diseases are poorly understood. Prognosis may be unclear.
Strategies:
- Focus on what you can control
- Connect with others who have your condition (if possible)
- Work with providers who acknowledge uncertainty honestly
- Take life in smaller time frames when the future feels overwhelming
Research and Clinical Trials
Section titled “Research and Clinical Trials”The Research Gap
Section titled “The Research Gap”The challenge: Rare diseases receive less research funding relative to need.
Why:
- Small patient populations = less commercial interest
- Harder to recruit for clinical trials
- Less research infrastructure for many conditions
What’s changing:
- Increased awareness and advocacy
- Genetic testing making diagnosis faster
- Patient registries helping with research recruitment
- International collaboration
Participating in Research
Section titled “Participating in Research”Clinical trials: May be only access to new treatments. Also contribute to knowledge.
Finding trials:
- ClinicalTrials.gov (US registry)
- EU Clinical Trials Register
- Disease-specific organizations
- Your specialists
Patient registries: Databases of patients with specific conditions. Help researchers and may lead to trial recruitment.
Natural history studies: Research following disease progression. Important for understanding conditions with limited data.
Patient-Driven Research
Section titled “Patient-Driven Research”Many rare disease advances have come from patients and families:
Patient advocacy organizations: Fund research, connect researchers and patients, shape research priorities.
Parent-founded research foundations: When children are diagnosed, parents have founded organizations that fund millions in research.
Patient-led initiatives: People with rare diseases conducting their own research, especially where formal research doesn’t exist.
Finding Community
Section titled “Finding Community”The Isolation Challenge
Section titled “The Isolation Challenge”Rare means few others: You may never meet another person with your condition in your local community.
Unique experiences: Friends, family, and even most disabled people may not understand your specific situation.
But community exists: The internet has transformed rare disease community-building.
Where to Find Your People
Section titled “Where to Find Your People”Disease-specific organizations: Many rare diseases have dedicated organizations, even if small. Search for your condition + “foundation,” “association,” or “support group.”
Online communities:
- Facebook groups for specific conditions
- Reddit communities
- Discord servers
- Condition-specific forums
NORD (National Organization for Rare Disorders): US-based umbrella organization; provides resources for many conditions.
EURORDIS: European rare disease alliance.
Rare disease day events: February 28/29 is Rare Disease Day; events can connect patients.
Conferences: Condition-specific or general rare disease conferences bring communities together.
When No Community Exists
Section titled “When No Community Exists”For very rare conditions, there may be no organized community:
Start one: Online groups can be started by anyone.
Connect with related conditions: Similar symptoms or affected body systems may mean shared experiences.
Broader rare disease community: Organizations like NORD and EURORDIS serve all rare diseases.
Undiagnosed community: If you lack a diagnosis, others without diagnoses understand.
Where Are You?
Section titled “Where Are You?”United States
Section titled “United States”Diagnosis and care:
- NIH Undiagnosed Diseases Program (for very difficult cases)
- Academic medical centers with rare disease programs
- Genetic testing increasingly accessible
- Telehealth can expand access to specialists
Treatments:
- Orphan Drug Act provides incentives
- FDA expedited programs for serious rare diseases
- Patient assistance programs for expensive orphan drugs
Benefits:
Organizations:
- NORD (National Organization for Rare Disorders): Advocacy, education, patient programs
- Global Genes: Advocacy and support
- Genetic Alliance: Patient advocacy network
- Condition-specific organizations
Canada
Section titled “Canada”Diagnosis and care:
- Provincial genetics programs
- Some specialized rare disease clinics
- Care Ontario’s Rare Diseases Initiative and similar provincial efforts
Treatments:
- Orphan drug framework exists but access challenges remain
- Provincial drug coverage varies
Benefits:
- Provincial disability programs
- See Canada Benefits
Organizations:
- Canadian Organization for Rare Disorders (CORD)
- Condition-specific organizations
United Kingdom
Section titled “United Kingdom”Diagnosis and care:
- NHS Highly Specialised Services for some conditions
- Genomics England and 100,000 Genomes Project
- Rare disease centers
- Long wait times may still apply
Treatments:
- NICE evaluates treatments including orphan drugs
- Highly Specialised Technologies program
- Access can be challenging for expensive treatments
Benefits:
- PIP for rare diseases causing functional limitations
- See UK Benefits
Organizations:
- Genetic Alliance UK
- Rare Disease UK
- Condition-specific charities
UK Rare Diseases Framework: National strategy for improving rare disease care.
European Union
Section titled “European Union”EU-wide initiatives:
- European Reference Networks (ERNs): Specialized centers across EU
- EMA orphan designation program
- EURORDIS advocacy network
Country variations: Healthcare systems differ; access to specialists and treatments varies.
Organizations:
- EURORDIS: European rare disease alliance
- National rare disease alliances
- Condition-specific organizations
Australia
Section titled “Australia”Diagnosis and care:
- Some specialized genetic services
- Rare Diseases Action Plan
- National Strategic Action Plan for Rare Diseases being implemented
NDIS: May cover supports for rare diseases with significant impact. See Australia Benefits.
Organizations:
- Rare Voices Australia
- Condition-specific organizations
Other Countries
Section titled “Other Countries”Rare disease care varies dramatically:
Challenges in low-resource settings:
- Limited access to genetic testing
- Few specialists
- Treatments may be unavailable or unaffordable
- Travel for care may be necessary
International resources:
- Rare Diseases International (global alliance)
- International patient organizations
- Telemedicine expanding access
- Medical tourism for rare disease care (complex and expensive)
Rare Disease in Daily Life
Section titled “Rare Disease in Daily Life”Healthcare Management
Section titled “Healthcare Management”Tips from the community:
- Keep comprehensive medical records
- Maintain medication and supplement list
- Bring research to appointments (carefully)
- Find at least one provider who will coordinate
- Build relationships with pharmacists for specialty medications
- Know your disease — you may need to educate providers
Work and Employment
Section titled “Work and Employment”Disclosure considerations: Rare diseases may require more explanation than common conditions.
Accommodations: May need flexible schedules for medical appointments, travel for specialized care, accommodations for symptoms.
Remote work: Can be particularly valuable when appointments and healthcare travel are frequent.
Benefits and Financial Support
Section titled “Benefits and Financial Support”Qualifying for benefits: Rare diseases can qualify for disability benefits based on functional limitations.
Medication costs: Orphan drugs can be extremely expensive. Patient assistance programs, foundations, and insurance advocacy may help.
Medical travel costs: May be deductible or covered in some situations.
See Benefits, Insurance Navigation.
Emotional Impact
Section titled “Emotional Impact”The Psychological Journey
Section titled “The Psychological Journey”Diagnosis: May bring relief (finally knowing) and grief (difficult reality).
Uncertainty: Living with conditions that are poorly understood.
Isolation: Feeling alone with a condition few understand.
Advocacy exhaustion: Being your own advocate constantly.
Hope and disappointment: Awaiting research, treatments, breakthroughs.
Getting Support
Section titled “Getting Support”Peer support: Others with rare diseases understand, even if they don’t have your specific condition.
Therapy: Look for therapists familiar with chronic illness/disability.
Online communities: Often the primary source of peer connection.
Take breaks from rare disease life: You’re more than your condition.
See Mental Health.
For Families
Section titled “For Families”When a Child Has a Rare Disease
Section titled “When a Child Has a Rare Disease”Diagnosis process: Often begins with parents knowing something is different.
Advocacy role: Parents often become primary advocates and researchers.
Siblings: May need support processing their own feelings.
Connecting with others: Other families who’ve been there are invaluable.
When a Parent Has a Rare Disease
Section titled “When a Parent Has a Rare Disease”Impact on children: Adjust information to age; provide stability.
Genetic implications: Some rare diseases are inherited; genetic counseling can help.
Planning: Consider guardianship, care plans, discussions with children.
Genetic Counseling
Section titled “Genetic Counseling”For hereditary rare diseases, genetic counseling can help with:
- Understanding inheritance patterns
- Family planning decisions
- Testing family members
- Processing information emotionally
Advocacy and Organizing
Section titled “Advocacy and Organizing”The Rare Disease Movement
Section titled “The Rare Disease Movement”Rare disease patients and families have organized powerfully:
Achievements:
- Orphan Drug Act and similar laws
- Increased research funding
- Newborn screening expansion
- Patient registries
- Awareness campaigns
How patients drive change:
- Founding research foundations
- Fundraising for specific conditions
- Advocating for policy changes
- Participating in research
- Creating patient communities
Getting Involved
Section titled “Getting Involved”Ways to participate:
- Join condition-specific organizations
- Participate in Rare Disease Day (February 28/29)
- Share your story
- Fundraise for research
- Advocate for policy change
- Participate in registries and research
Rare Disease Day
Section titled “Rare Disease Day”February 28/29 is Rare Disease Day (on the rare day in rare years).
Events include:
- Awareness campaigns
- Patient gatherings
- Research and policy discussions
- Media coverage
- Community building
See Advocacy & Self-Advocacy, Get Involved.
Intersectionality
Section titled “Intersectionality”BIPOC with Rare Diseases
Section titled “BIPOC with Rare Diseases”Disparities:
- Longer diagnostic journeys
- Less likely to be believed
- Less represented in research
- May face barriers to specialized care
- Genetic databases have historically underrepresented non-white populations
Need for: More diversity in rare disease research, advocacy, and care.
Global Disparities
Section titled “Global Disparities”Access varies dramatically:
- Wealthy countries have more specialists, treatments, research
- Many people globally have no access to diagnosis or treatment
- International advocacy working on access
Disability Identity and Rare Disease
Section titled “Disability Identity and Rare Disease”Some people with rare diseases identify as disabled; others don’t. Both are valid.
Disability community includes rare disease. Shared experiences of navigating healthcare, fighting for access, advocating for change.
See Intersectionality.
Resources
Section titled “Resources”Key Organizations
Section titled “Key Organizations”United States:
- NORD (National Organization for Rare Disorders): rarediseases.org
- Global Genes: globalgenes.org
- Genetic and Rare Diseases Information Center (GARD): rarediseases.info.nih.gov
Canada:
- Canadian Organization for Rare Disorders (CORD): raredisorders.ca
United Kingdom:
- Rare Disease UK: raredisease.org.uk
- Genetic Alliance UK: geneticalliance.org.uk
Europe:
- EURORDIS: eurordis.org
International:
- Rare Diseases International: rarediseasesinternational.org
Finding Information About Your Condition
Section titled “Finding Information About Your Condition”- GARD (Genetic and Rare Diseases Information Center)
- Orphanet (European rare disease database)
- OMIM (Online Mendelian Inheritance in Man)
- Disease-specific organization websites
- PubMed (medical literature)
Finding Clinical Trials
Section titled “Finding Clinical Trials”- ClinicalTrials.gov
- EU Clinical Trials Register
- Disease-specific organizations
- Your specialists
You Are Not Alone
Section titled “You Are Not Alone”Having a rare disease can feel isolating. But remember:
- Millions of people worldwide have rare diseases
- Community exists — online and increasingly in person
- Advocacy has power — rare disease patients have achieved remarkable policy and research wins
- Your experience matters — you contribute to understanding your condition
- You are more than your diagnosis — rare disease is part of your life, not the whole story
Related Pages
Section titled “Related Pages”- Chronic Illness
- Invisible Disabilities
- Multiple Disabilities
- Physical Disabilities
- Accessible Healthcare
- Insurance Navigation
- Benefits Overview
- Community & Peer Support
- Online Communities
Contribute to This Page
Section titled “Contribute to This Page”Have lived experience or expertise that could strengthen this page? We especially welcome perspectives on models not well represented here, including those from the Global South and Indigenous communities.
This page centers disabled people’s expertise and is informed by disabled-led organizing globally. For questions or to suggest additions, see How to Contribute.