This prospective single-center study aims to evaluate the clinical efficacy of fluoroscopy-guided cervical interlaminar epidural steroid injection (CIESI) in patients with unilateral, single-level cervical radiculopathy due to cervical disc herniation. Unlike previous studies that assessed neck and arm symptoms separately, this study uses the Cervical Radiculopathy Impact Scale (CRIS) as the primary outcome measure to simultaneously evaluate cervical and upper extremity symptoms and their functional impact. A total of 98 patients resistant to conservative treatment will be assessed at baseline, 3 weeks, and 3 months after CIESI using CRIS, Numeric Rating Scale (NRS), Neck Disability Index (NDI), and QuickDASH scores. The primary outcome is improvement in CRIS scores following the intervention, while secondary outcomes include changes in pain intensity and functional disability. The study seeks to determine whether CRIS provides a more comprehensive and clinically meaningful assessment of treatment response in cervical radiculopathy.