American CareSource Holdings Set to Join Russell 3000(R) Index

DALLAS, TX--(Marketwire - June 18, 2009) -

American CareSource Holdings, Inc. (NASDAQ: ANCI) today announced that it is set to join the broad-market Russell 3000® Index when Russell Investments reconstitutes its comprehensive set of U.S. and global equity indexes on June 26, 2009 according to a preliminary list of additions posted June 12, 2009 on www.russell.com.

David S. Boone, Chief Executive Officer of American CareSource, noted, "We are pleased that American CareSource will join the Russell 3000® Index this year. Our inclusion reflects our continued progress in building the Company on a national scale and addressing the critical need to reduce U.S. ancillary health care costs while maintaining high quality standards. As part of this year's Russell 3000® Index, American CareSource should benefit from increased investor awareness and interest."

Annual reconstitution of Russell's U.S. indexes captures the largest U.S. stocks as of the end of May, ranking them by total market capitalization. Membership in the Russell 3000®, which remains in place for one year, means automatic inclusion in the large-cap Russell 1000® Index or small-cap Russell 2000® Index as well as the appropriate growth and value style indexes. Russell determines membership for its equity indexes primarily by objective, market-capitalization rankings and style attributes. The Russell 3000® also serves as the U.S. component to the Russell Global Index, which Russell launched in 2007.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. An industry-leading $4 trillion in assets currently are benchmarked to them. These investment tools originated from Russell's multi-manager investment business in the early 1980s when the company saw the need for a more objective, market-driven set of benchmarks in order to evaluate outside investment managers. Total returns data for the Russell 3000® and other Russell Indexes is available at http://www.russell.com/Indexes/performance/default.asp.

About Russell

Russell Investments provides strategic advice, world-class implementation, state-of-the-art performance benchmarks and a range of institutional-quality investment products. Russell has $136 billion in assets under management as of March 31, 2009, and serves individual, institutional and advisor clients in more than 40 countries. Founded in 1936, Russell is a subsidiary of The Northwestern Mutual Life Insurance Company.

About Ancillary Healthcare Services

American CareSource provides ancillary healthcare services through its network that offer cost effective alternatives to physician and hospital-based services. This market is estimated at $574 billion, and has grown to 30% of total national health expenditures. These providers offer services in over 30 categories, including laboratories, dialysis centers, free-standing diagnostic imaging centers, non-hospital surgery centers, as well as durable medical equipment such as orthotics and prosthetics, and others.

About American CareSource Holdings, Inc.

American CareSource Holdings, the first national, publicly traded ancillary care network services company, offers a comprehensive national network of approximately 3,000 ancillary service providers at over 26,000 sites through its subsidiary, Ancillary Care Services. The Company's ancillary network and management provides a complete outsourced solution for a wide variety of healthcare payors and plan sponsors including self-insured employers, indemnity insurers, PPOs, HMOs, third party administrators and both federal and local governments. For additional information, please visit www.anci-care.com.

Safe Harbor Statement Under the Private Securities Litigation Reform Act of 1995:

Any statements that are not historical facts contained in this release, including with respect to future engagements by clients, revenue growth, earnings, and guidance, are forward-looking statements. It is possible that the assumptions made by American CareSource Holdings, Inc. for purposes of such statements may prove to be inaccurate or may not materialize. Actual results may differ materially from those projected or implied in any forward-looking statements. Such statements may involve further risks and uncertainties, including but not limited to those relating to demand for our services, pricing, market acceptance, our ability to integrate with our clients, our ability to attract and maintain providers, our ability to manage growth, the effect of economic, political and regulatory conditions, the effect of competition, risks in product development, the ability to complete transactions, and other risks identified in this release, and the Securities and Exchange Commission filings of American CareSource Holdings, Inc.

ANCI-G