EXHIBIT 16.1 Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Re: Integral Systems, Inc. --------------------- Ladies and Gentlemen: We have read Item 4(a) of the Form 8-K of Integral Systems, Inc. dated January 4, 2002 and agree with the statements contained therein. /s/ Rubino & McGeehin, Chartered ---------------------------------------- Rubino & McGeehin, Chartered Certified Public Accountants Bethesda, Maryland January 4, 2002