Illinois is continuing to approve patients to use medical marijuana, with about 400 more approval letters sent in January.
The Illinois Department of Public Health says it has approved 4,400 patients for the pilot program. That includes 32 children.
Marijuana industry players are watching the numbers closely as they push for more outreach to doctors, who have been reluctant to approve patients.
Qualifying patients pay an annual fee of $100 for a marijuana card and need a doctor's written certification.