NEWPORT BEACH, Calif. – October 8, 2004 – The TriZetto Group Inc. (NASDAQ: TZIX) announced its agreement with WellChoice Inc. (NYSE: WC), the parent company of Empire Blue Cross Blue Shield, to provide NetworXModeler™ software, a unique analysis tool that will allow the health plan to automatically assess the financial impact of proposed provider contract terms.

WellChoice, serving 4.9 million members, is the largest health insurer in New York State (based on HMO and PPO membership) and has the most expansive provider network in its service area, with 147 hospitals and more than 65,000 physician locations.

TriZetto's standalone NetworXModeler software uses actual claims data to forecast costs against proposed provider rates and terms, making it easier for health plans to negotiate and structure pricing arrangements with hospitals.

"In just hours, NetworXModeler automatically analyzes contract terms, providing crucial financial information that otherwise would take weeks to calculate using manual processes," said Jeff Hensley, vice president of new technology for TriZetto. "The NetworX technology can help health plans of all sizes accelerate negotiations, even as provider contracts become increasingly complex."

About TriZetto

TriZetto serves the payer market, comprised of national and regional health insurance plans as well as benefits administrators, which provide transaction services to self-insured employer groups. The company offers a broad portfolio of information technology products - software, outsourcing services, and consulting services - tailored to the needs of healthcare payers. Headquartered in Newport Beach, Calif., TriZetto can be reached at (949) 719-2200 or www.trizetto.com.

This press release contains forward-looking statements that involve risks and uncertainties. The forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements may include statements about future net revenues, profits, and financial results, the market for TriZetto's services, future service offerings, industry trends, client and partner relationships, and TriZetto's operational capabilities. Actual results may differ materially from those stated in any forward-looking statements based on a number of factors, including the effectiveness of TriZetto's implementation of its business plan, the market's acceptance of TriZetto's new and existing products and services, the timing of new bookings, risks associated with management of growth, reliance on third parties to supply key components of TriZetto's services, attraction and retention of employees, variability of quarterly operating results, competitive factors, risks associated with acquisitions, changes in demand for third party products or solutions which form the basis of TriZetto's service and product offerings, financial stability of our customers, the ability of TriZetto to meet its contractual obligations to customers, including service level and disaster recovery commitments, changes in government laws and regulations and risks associated with rapidly changing technology, as well as the other risks identified in TriZetto's SEC filings, including, but not limited to, its annual report on Form 10-K and quarterly reports on Form 10-Q, copies of which may be obtained by contacting TriZetto's investor relations department at 949/719-2225 or at TriZetto's web site at www.trizetto.com. All information in this release is as of October 8, 2004. TriZetto undertakes no duty to update any forward-looking statement to conform the statement to actual results or changes in the company's expectations.

CONTACTS:

TriZetto Media Relations
Audrey Mautner
303-495-7197
audrey.mautner@trizetto.com

Schwartz Communications
Brian Bogie
781-684-0770
trizetto@schwartz-pr.com