MELVILLE, NY, October 6, 2005 – Allion Healthcare, Inc. (NASDAQ: ALLI), a national provider of specialty pharmacy and disease management services focused on HIV/AIDS patients, announced today that it was added to the Russell 3000^®, 2000^® and Microcap^TM Indexes, effective September 30, 2005.

Russell indexes are widely used by investment managers and institutional investors for index funds and as benchmarks for both passive and active investment strategies. Investment managers who oversee these funds purchase shares of member stocks according to that company's weighting in the particular index.

“We are pleased that Allion has been added to the Russell 3000^®, 2000^® and Microcap^TM Indexes,” said Michael Moran, President and Chief Executive Officer of Allion Healthcare. “Our inclusion will facilitate broadening the visibility of our Company among the wide base of institutional portfolios that use the Russell as a benchmark in their investment strategies.”

In August of 2004, Russell announced that its family of U.S. indexes will add IPOs on a quarterly basis to enhance market representation without significant turnover. Currently, more than $2.5 trillion in assets are benchmarked to these indexes.

About Allion Healthcare, Inc.
Allion Healthcare, Inc. is a national provider of specialty pharmacy and disease management services focused on HIV/AIDS patients. Allion Healthcare sells HIV/AIDS medications, ancillary drugs and nutritional supplies under the trade name MOMS Pharmacy.  Allion offers nationwide pharmacy care from its pharmacies in California, New York, Washington, and Florida. Allion Healthcare works closely with physicians, nurses, clinics, AIDS Service Organizations, and with government and private payors, to improve clinical outcomes and reduce treatment costs for patients.

Safe Harbor Statement
Certain statements included in this press release, which are not historical facts, are forward-looking statements. Such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. These forward-looking statements represent our expectations or beliefs and involve certain risks and uncertainties, including those described in our public filings with the United States Securities and Exchange Commission; also including, but not limited to, competitive pressures, changes in customer mix, changes in third party reimbursement rates, changes in government regulations or the interpretation of these regulations, growth opportunities, cost savings, revenue enhancements, synergies and other benefits anticipated from acquisition transactions, difficulties relative to integrating acquired businesses, the accounting and tax treatment of acquisitions, and asserted and unasserted claims, which could cause actual results to differ from those in the forward-looking statements. The forward-looking statements by their nature involve substantial risks and uncertainties, certain of which are beyond our control, and actual results may differ materially depending on a variety of important factors. You are cautioned not to place undue reliance on these forward-looking statements that speak only as of the date herein.

Contact:
Allion Healthcare, Inc.
Jim Spencer, Chief Financial Officer
(631) 870-5126

The Ruth Group
Francesca DeMartino, Investor Relations
(646) 536-7024
fdemartino@theruthgroup.com