EDEN PRAIRIE, Minn. and NEWPORT BEACH, Calif. – September 19, 2006 – Ingenix, a health information company of UnitedHealth Group (NYSE: UNH), and the TriZetto Group Inc. (Nasdaq:TZIX) today announced that they have signed an alliance agreement to offer Ingenix Claims Editing System for Professional and Facility Claims to TriZetto's customers. The Ingenix software will integrate with the TriZetto® Facets Extended Enterprise® platform. The first client, Premera Blue Cross, has signed a multi-year contract and has begun implementation.

"Ingenix Claims Editing System will provide TriZetto customers additional high-value claims editing choices to further enhance the market-leading return on investment that our Facets core enterprise administration solution offers to health care payers," noted Tony Bellomo, TriZetto's executive vice president, enterprise solutions.

"Working with TriZetto, Ingenix is helping improve the business of health care," said David Ostler, executive vice president of Ingenix. "This alliance provides significant benefits to clients of both companies. Ingenix Claims Editing System is a powerful complement to TriZetto's platform and allows health plans to automatically apply transparent, flexible editing rules and improve the accuracy of all paid claims while supporting disclosure requirements."

Ingenix Claims Editing System is utilized by health plans to automatically review and edit health care claims submitted by physicians and facilities. The software checks each claim for errors, omissions, and questionable coding relationships by testing the data against an expansive KnowledgeBase containing more than nine million government, industry and corporate rules, regulations, and policies governing health care claims. In addition, Ingenix offers a unique Rules Creation Module that allows health plans to customize the software's editing logic to support user-defined rules and reimbursement policies.

More than 165 health plans use the Ingenix Claims Editing System and rules to streamline claims processing workflows, reduce reimbursement errors, and improve payment integrity. Ingenix offers a broad portfolio of products and services to help health care payers prevent, detect, and recover fraudulent, erroneous, and abusive health care claims payments.

About Ingenix

Ingenix, a wholly-owned subsidiary of UnitedHealth Group (NYSE: UNH), provides products and services to a diverse customer base within the health care community. Organizations rely on its innovative technology to improve the delivery and operations of their business. More information about Ingenix and its products and services can be obtained at www.ingenix.com.

About TriZetto

Touching more than 35% of the U.S. insured population, TriZetto is distinctly focused on accelerating the ability of healthcare payers to lead the industry's transformation. The company provides premier information technology solutions that enhance its customers' revenue growth, drive their administrative efficiency, and improve the cost and quality of care for their members. Healthcare payers include national and regional health insurance plans, and benefits administrators that provide transaction services to self-insured employer groups. The company's broad array of payer-focused information technology offerings include enterprise and component software, hosting and business process outsourcing services, and consulting. Headquartered in Newport Beach, California, TriZetto can be reached at 949-719-2200 or at www.trizetto.com.

INGENIX CONTACTS:

Media:
Joan Schimml
952-833-6582
joan.schimml@ingenix.com

TRIZETTO CONTACTS:

Media:
Audrey McDill
303-495-7197
audrey.mcdill@trizetto.com

Investors:
Brad Samson
949-719-2220
brad.samson@trizetto.com