Carlyle-Backed MultiPlan To Buy WCAS-Backed Viant

MultiPlan Inc., a portfolio company of The Carlyle Group, has agreed to acquire Viant Inc., a portfolio company of Welsh Carson Anderson & Stowe. No financial terms were disclosed for the merger, which will create a single provider of medical cost management services.

New York, NY and Naperville, IL, August 3, 2009 – MultiPlan, Inc. and Viant, Inc. today
announced that MultiPlan will acquire Viant, bringing together the considerable expertise and
complementary solutions of both companies to produce the industry’s most comprehensive
provider of medical cost management services. MultiPlan will continue to operate Viant’s
distinct product line, creating an electronic gateway for clients to efficiently leverage the
strengths of each company’s provider networks and non-network cost management services.
The transaction is expected to close before the end of the year, subject to satisfaction of closing
conditions including customary regulatory approvals. Financial terms were not disclosed.
Founded in 1980, MultiPlan is a provider of PPO network and related transaction-based solutions
that reduce the per-unit costs of medical claims. MultiPlan contracts directly with over 5,000
hospitals, 115,000 ancillary care facilities and 625,000 practitioners who participate in the
company’s national primary and complementary PPO networks.

Established in 1990 as Preferred Payment Systems, Inc., Viant today offers PPO networks,
network management, pre-payment and post-payment services to commercial and government
clients. Viant’s networks represent approximately 5,400 hospitals, 95,000 ancillary facilities and
600,000 practitioners.

Both companies offer their networks and services to health plans, and do not themselves assume
insurance risk or deliver medical care.

|“Viant joins the MultiPlan family at a time when medical costs have never been higher, and the
need for innovative technology and comprehensive solutions to reduce those costs has become
the nation’s priority,” said Mark Tabak, MultiPlan’s Chief Executive Officer. “In this tough
economic climate, our companies together can more effectively enable the value exchange
between healthcare providers and payers that helps more Americans get the most from their
healthcare dollar.”

Added Dan Thomas, Chief Executive Officer of Viant, “Our companies have highly
complementary solutions that enable us to immediately enhance the value we offer to our
respective customers. It is also clear that this transaction will benefit providers as the companies
integrate and consolidate administrative functions to produce greater efficiencies and cash flow
for providers. In addition, Viant’s recent entrée into the public sector is expected to be one of the
meaningful growth drivers for the combined organization.”

Together, MultiPlan and Viant offer healthcare payers an end-to-end solution for managing
healthcare unit costs on a pre- and post-payment basis. In 2008, the companies reduced the cost
of over $20 billion in billed claim charges for commercial healthcare payers and their primary
PPO enrollees.

About MultiPlan
MultiPlan, Inc. is the industry’s most comprehensive provider of healthcare cost management
solutions. The company provides over 2,300 clients with a single gateway to a host of primary,
complementary and out-of-network strategies for managing the financial risks associated with
healthcare claims. Clients include large and mid-sized insurers, third party administrators, selffunded
plans, HMOs and other entities that pay claims on behalf of health plans. Incorporated in
1980, MultiPlan is owned by a group of investors led by the Carlyle Group. For more
information, visit

About Viant
Viant, Inc. (through its subsidiaries including Texas True Choice and national PPO network,
Beech Street) provides healthcare payment solutions through primary and complementary
networks, integrated network and contract management, non-network cost management services
and post payment audit and recovery services to the U.S. commercial and public health insurance
sectors. Viant’s comprehensive and effective cost management strategies focus on timely,
accurate and fair payment for providers, payers and patients.