Cancer and medical marijuana in Colorado: do you qualify?
Yes. The Colorado Medical Marijuana Registry lists Cancer as a qualifying condition. A Colorado-licensed provider still has to evaluate you and agree that cannabis is appropriate.
About cancer
Cancer and its treatment — chemotherapy, radiation, surgery — can cause pain, nausea, vomiting, appetite loss and trouble sleeping.
Stronger evidence. The National Academies found conclusive evidence that oral cannabinoids prevent and treat chemotherapy-induced nausea and vomiting. There is not enough evidence that cannabis treats or cures cancer.
Symptoms Colorado patients most often hope to ease:
- Nausea and vomiting from chemotherapy
- Loss of appetite and unwanted weight loss
- Cancer-related pain
- Burning or tingling nerve pain from chemotherapy
- Trouble sleeping
Before you start. CBD can affect liver enzymes that process some chemotherapy and targeted drugs, so your oncology team must know about any cannabis you use. A few small studies have raised questions about whether cannabis use may affect how well immunotherapy works, which is worth discussing with your oncologist.
Read more: medical marijuana for cancer.
How to get certified in Colorado
- Book an in-person visit with an eligible provider (MD or DO for debilitating conditions; dentists and advanced practice providers may also certify disabling conditions).
- Your provider submits the certification electronically to the registry.
- Within 6 months, create an account on the CDPHE registry and start a new patient registration.
- Upload a copy of your Colorado driver's license or ID, link your provider certification, and choose a cultivation option or caregiver.
- Pay the $52 nonrefundable fee, or apply for a fee waiver if eligible.
- Once approved, usually in 1-3 business days, download your card to print or show on your phone.
Colorado requires your first certification visit in person. Renewals can usually be done online.
Costs and timeline
- State fee: $52 (Fee waiver for households at or below 185% of the Federal Poverty Level (tax return required))
- Card lasts: 1 year (60 days to 1 year for some disabling conditions)
- Processing: 1-3 business days for complete online applications
- Patient limit: 2 ounces of usable marijuana (more if the provider documents medical need)
- Home grow: 6 plants (3 mature), or more if the provider recommends an extended plant count; local rules may limit cultivation
- Recreational sales: Legal for adults 21+
- First visit online: No — in person first
See the full Colorado cost breakdown and Colorado program overview.
Other qualifying conditions in Colorado
- Autism spectrum disorder
- Cachexia & wasting syndrome
- Chronic pain
- Epilepsy & seizures
- Glaucoma
- HIV/AIDS
- Nausea & appetite loss
- PTSD
- Severe muscle spasms & spasticity
Cancer in nearby states
Frequently asked questions
Do I need medical records for cancer?
Helpful records include: pathology or imaging reports confirming your cancer diagnosis; recent notes from your oncologist describing your stage and current treatment plan; a full list of medicines, including chemotherapy, anti-nausea drugs, pain medicines and blood thinners. Many patients are still evaluated on their history alone, and your Colorado provider will tell you if more is needed.
How long does certification take in Colorado?
The provider visit takes about 15 minutes. 1-3 business days for complete online applications.
Can I renew online in Colorado?
In most cases, yes. You can renew online within 30 days of your expiration date. Each renewal needs a brand-new provider certification and the application fee.
Sources
- CDPHE - Medical Marijuana Registry
- CDPHE - How to apply for a Colorado medical marijuana card
- CDPHE - Medical Marijuana Registry FAQ
- CDPHE - Medical Marijuana Registry Providers
- CDPHE - Medical Marijuana Registry Caregivers
- Colorado Legislative Council - Medical Marijuana: Colorado Law Summary
- National Academies — The Health Effects of Cannabis and Cannabinoids (2017)
This guide is general information, not medical or legal advice. Laws change — confirm details with your state agency. State facts last checked October 7, 2026.