Attachment B

Aetna U.S. Healthcare
10101 Reunion Place, Suite 200
San Antonio, TX 78216

AmeriHealth of Texas
10711 Burnet Road, Suite 312
Austin, TX 78758

Amil International, Inc.
9229 Waterford Centre Blvd., Suite 500
Austin, TX 78758

Blue Cross Blue Shield of Texas, Inc.
9020 Capital of Texas Hwy. North
Building II, Suite 400
Austin, TX 78759

Foundation Health Systems, Inc.
9101 Burnet Road, Suite 104
Austin, TX 78758

Healthsource Texas, Inc.
1701 Directors Blvd., Suite 110
Austin, TX 78744

 Humana Health Care Plans
8303 N. MoPac Expressway, Suite 450
Austin, TX 78759

NYLCare Health Plans of the Gulf Coast, Inc.
8701 N. MoPac Expressway, Suite 440
Austin, TX 78759

Prudential Health Care Plan, Inc.
7700 Chevy Chase Drive
Building I, Suite 500
Austin, TX 78752

Scott & White Health Plan
One Chisholm Trail, Suite 200
Round Rock, TX 78681

United HealthCare of Texas, Inc.
1250 S. Capital of Texas Highway
Building One, Suite 400
Austin, TX 78746

Vista Health Plan, Inc.
7801 North I-35
Austin, TX 78753