For Investors

Please direct Shareholder inquires to:

Susan Tennent

978-657-7500 ext. 2205
978-657-9193 FAX
E-Mail Address: Investor-relations@dusapharma.com

Corporate Office

DUSA Pharmaceuticals, Inc.
25 Upton Drive
Wilmington, MA 01887
978-657-7500 Telephone
978-657-9193 FAX

Transfer Agent and Registrar

American Stock Transfer & Trust Company
40 Wall Street, 46th Floor
New York, NY 10005

Auditors

Deloitte & Touche LLP
Boston, MA