Dermatology Residency - 2018 St. Joseph Mercy Health System ACGME Accredited Ann Arbor, MI. Certified. American Board of Dermatology - 2018. Publications & Presentations. Niv D, Ramirez J, Fivenson D. Pyoderma gangrenosum, acne, and hidradenitis suppurativa (PASH) syndrome with recurrent vasculitis. JAAD Case Reports. 2017;3:70-3..