EXHIBIT 16.1 [PRICEWATERHOUSECOOPERS LLP LETTERHEAD] Securities and Exchange Commission 450 5th Street, N.W. Washington, D.C. 20549 August 21, 1998 Commissioners: We have read the statements made by HealthDesk Corporation (copy attached), which were filed with the Commission, pursuant to Item 4 of Form 8-K, as part of the Company's Form 8-K report dated August 18, 1998. We agree with the statements concerning our Firm in such Form 8-K. Very truly yours, PRICEWATERHOUSECOOPERS LLP 3