Background: Skin diseases, such as psoriasis, hidradenitis suppurativa, acne, and alopecia areata, have increasingly been linked to systemic and mental health comorbidities, such as depression. Although identification and management of these comorbidities is typically a part of primary care, some patients might not have an established relationship with a primary care provider and may only be seeing their dermatologist. Objective: To examine the frequency with which dermatologists are the main contact within a health care system for patients with these chronic skin conditions. Methods: We performed a retrospective cohort study using Optum's deidentified Clinformatics Data Mart Database. The primary outcome was the proportion of patients who established care with a dermatologist and had no encounters with a primary care provider during the subsequent year after this dermatology encounter. Results: Across each of the skin diseases evaluated, 21.6%-31.2% of men and 16.9%-26.2% of women had no primary care visits in the subsequent year after establishing care with their dermatologist. Conclusion and Relevance: For many patients with chronic skin diseases, their dermatologist might be their only source of contact with the health care system. There may be an opportunity for dermatologists to improve the quality of care for our patients by screening for associated comorbidities.