Home - Pure Dermatology. Monday - Friday 9 AM - 5 PM | (406) 586-7873 Phone | (406) 586-2332 Fax. Bill Pay & Patient Forms. Telehealth Portal. Pure Dermatology. Southwest Montana's premiere dermatology practice, offering comprehensive medical, surgical and aesthetic care of the skin. Botox. CoolSculpting. Laser Treatments..