ALLION HEALTHCARE ANNOUNCES FIRST QUARTER 2008 FINANCIAL RESULTS AND CONFERENCE CALL DATE 

MELVILLE, NY – April 28, 2008– Allion Healthcare, Inc. (NASDAQ: ALLI), today announced that it will release its financial results for the first quarter ended March 31, 2008, after the close of U.S. financial markets on Thursday, May 8, 2008. An accompanying conference call to discuss the results will be held at 5:00 p.m. ET; on Thursday, May 8, 2008.

To join the call, please dial (913) 312-0863 from the U.S. or abroad. The conference call will also be webcast on Allion Healthcare’s website at www.allionhealthcare.com. To join the webcast, please go to Allion Healthcare’s web site at least 15 minutes prior to the start of the conference call to register, download, and install any necessary audio software.

An audio replay of the conference call will be available from 8:00 p.m. ET on Thursday, May 8, 2008, through 8:00 p.m. ET on Thursday, May 15, 2008, by dialing (719) 457-0820 from the U.S. or abroad and entering confirmation code 8255945. The audio webcast will also be available on the company's website, www.allionhealthcare.com, for one year.

Questions during the live call will be taken from investment professionals only.

About Allion Healthcare

Allion Healthcare, Inc. is a national provider of specialty pharmacy and disease management services focused on HIV/AIDS patients as well as specialized biopharmaceutical medications and services to chronically ill patients. Allion Healthcare sells HIV/AIDS medications, ancillary drugs and nutritional supplies under the trade name MOMS Pharmacy. Allion Healthcare provides services for the intravenous immunoglobulin, Blood Clotting Factor and other chronic therapies through its Biomed division. 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.

Company Contact:	Investor Contact:
Allion Healthcare, Inc.	The Cockrell Group
Steve Maggio, Interim Chief Financial Officer	Rich Cockrell
(631) 870-5106	(404) 942-3369