Objective: To determine the relationship between disease stage, hospital admission time, and vitamin D levels in patients with Idiopathic Facial Paralysis (Bell's palsy). Materials and Methods: The hospital registry system was scanned retrospectively and 52 patients diagnosed with idiopathic facial paralysis were included in the study. A control group was formed with 50 participants matched in terms of age and gender. Disease stage was determined according to the House-Brackmann Scale. Clinical and demographic data, vitamin D levels, and disease stages of the patients were recorded. Disease stage, duration of admission, and vitamin D levels were compared among patients. The patients and the control group were compared in terms of vitamin D levels. Results: There was no statistically significant difference between the groups in terms of age and gender. The mean Vitamin D level of the idiopathic facial paralysis group was found to be lower than the control group. There was a statistically significant difference between the duration of admission and the disease stage. The duration of admission for patients with stage 2 was found to be higher than those with stage 5-6. When analyzed in terms of Vitamin D, it was observed that the average Vitamin D level of Grade 2 was statistically significantly higher than Grade 4 and 5-6, also, it was observed that the mean Vitamin D level of Grade 3 was statistically significantly higher than Grade 5-6. Conclusion: According to our study results, we determined that vitamin D levels may be associated with development of the disease and disease prognosis. Also, we found that increased disease severity significantly shortened the duration of admission.