Radiation Therapy Services Added To Russell Indexes

FORT MYERS, Fla., Oct. 1 /PRNewswire-FirstCall/ -- Radiation Therapy Services, Inc. , a leading operator of radiation therapy centers, announced today that it has been added to the Russell 3000(R) and Russell 2000(R) Indexes, effective September 30, 2004.

Dr. Daniel Dosoretz, President and Chief Executive Officer, stated, “As a recent IPO, we are pleased that Radiation Therapy Services has been added to the Russell Indexes. We expect our inclusion in these prestigious indexes to further raise the visibility of the Company within the investment community. The Company remains solidly positioned for long-term growth. We continue to implement our business strategy of providing advanced radiation therapy technology and treatments to patients on a local market level.”

The Russell 3000(R) Index offers investors access to the broad U.S. equity universe and measures the performance of the 3,000 largest U.S. companies based on total market capitalization, which represents approximately 98% of the investable U.S. equity market. As of the latest reconstitution, the median market capitalization of the Russell 3000 was approximately $801 million. The Russell 2000(R) index offers investors access to the small-cap segment of the U.S. equity universe and includes the smallest 2000 securities in the Russell 3000.

The Russell family of 21 U.S. indexes is designed to be a comprehensive representation of the investable U.S. equity market. These indexes are value- weighted and include only common stocks belonging to corporations domiciled in the United States and its territories.

About Radiation Therapy Services

Radiation Therapy Services, Inc., which operates treatment centers primarily under the name 21st Century Oncology, is a provider of radiation therapy services to cancer patients. The Company’s 54 treatment centers are clustered into 18 regional networks in nine states, including Alabama, Delaware, Florida, Kentucky, Maryland, Nevada, New Jersey, New York and North Carolina. The Company is headquartered in Fort Myers, Florida. More information about the Company can be found at its Web site http://www.rtsx.com/.

This release may contain forward-looking statements about the Company’s future plans, expectations and objectives. Words such as “may,” “will,” “expect,” “intend,” “anticipate,” “plan,” “believe,” “seek,” “could” and “estimate” and variations of these words and similar expressions are intended to identify forward-looking statements. These forward-looking statements are not historical facts and are subject to risks and uncertainties that could cause the actual results to differ materially from those projected in these forward-looking statements including, but not limited to those risk factors described in the Company’s recent quarterly report on Form 10-Q and the “Risk Factors” section of the Form S-1 Registration Statement, as amended, relating to the Company’s initial public offering as well as the Company’s other filings with the Securities and Exchange Commission which are available on the SEC’s website at http://www.sec.gov/. Readers of this release are cautioned not to place undue reliance on forward-looking statements. The Company undertakes no obligation to publicly update or revise the forward-looking statements contained herein to reflect changed events or circumstances after the date of this release.

Contacts: Dave Koeninger Chief Financial Officer Radiation Therapy Services, Inc. 239-931-7282 dkoeninger@rtsx.com Investors/Media: Denise Roche/Greg Tiberend The Ruth Group 646-536-7008/7005 droche@theruthgroup.comgtiberend@theruthgroup.com

Radiation Therapy Services, Inc.

CONTACT: Dave Koeninger, Chief Financial Officer of Radiation TherapyServices, Inc., +1-239-931-7282, dkoeninger@rtsx.com; or Investors - DeniseRoche, +1-646-536-7008, droche@theruthgroup.com, or Media - Greg Tiberend,+1-646-536-7005, gtiberend@theruthgroup.com, both of The Ruth Group forRadiation Therapy Services, Inc.