Can I Get a Michigan Medical Marijuana Card for Nail Patella Syndrome?

Yes — nail patella syndrome qualifies under the Michigan Medical Marihuana Program

Nail patella syndrome is one of the original conditions explicitly listed in the 2008 Michigan Medical Marihuana Act and remains a Category A qualifying condition on the current Physician Certification Form. NPS is a rare autosomal dominant genetic disorder caused by LMX1B mutations, affecting roughly 1 in 50,000 people. The chronic joint pain — particularly knee and elbow pain from underdeveloped kneecaps and dysplastic joints — is the most common reason patients with NPS seek medical cannabis certification.

Common symptoms

• Underdeveloped or missing fingernails and toenails
• Absent, small, or dislocated kneecaps
• Elbow abnormalities and reduced range of motion
• Iliac horns (visible on pelvic X-ray)
• Chronic joint pain
• Kidney involvement (proteinuria, hypertension) in some patients
• Glaucoma (in some patients)

How medical cannabis may help

Cannabinoids address the chronic joint pain that defines the NPS experience for many patients. The endocannabinoid system modulates pain signaling through CB1 receptors in the CNS and peripheral nerves, and CB2 receptors on synovial and inflammatory cells. Patients commonly report reduced joint pain, improved sleep, and reduced reliance on NSAIDs or opioids when adding cannabis to their pain management. For NPS patients with glaucoma (a known association), the small IOP-lowering effect of THC may provide minor additional benefit, though it is not a substitute for first-line glaucoma therapy.

Evidence base

NPS-specific cannabis trials do not exist given the condition's rarity. The pain-management evidence base from chronic-pain populations — classified as "conclusive or substantial" by the 2017 NASEM report — is generally considered applicable. Patient-reported outcomes from rare-disease registries similarly suggest meaningful symptom benefit.

Michigan certification requirements

Documentation of your NPS diagnosis (genetic testing showing LMX1B mutation, or clinical diagnosis from a geneticist or rheumatologist) is helpful. A description of your joint pain pattern, any kidney or eye involvement, and your current medications is useful for the consultation.