The strike is expected to start January 3 and continue through January 5.
Howard Brown said it will ensure that all patient appointments are fulfilled or rescheduled as soon as possible.
Staffing is a key issue between the healthcare provider and the Illinois Nurses Association. The association said the healthcare system is understaffed and further cuts will harm patients.
Howard Brown Health released a statement saying in part, "As we work through these challenges, we remain steadfastly committed to our patients who rely on Howard Brown for critical, affirming healthcare services."