Pharmacy Benefit Management

Company

Total Rx/Year

Market Share

Medco Health Solutions, Inc.

553,000,000

15.40%

CVS/Caremark Rx, Inc.

536,254,000

14.94%

Express Scripts/CuraScript

519,600,000

14.47%

WellPoint NetRx

367,000,000

10.22%

ACS, Inc.

250,000,000

6.96%

Argus Health Systems, Inc.

186,000,000

5.18%

MedImpact Healthcare Systems, Inc.

170,400,000

4.75%

First Health Services Corporation

148,500,000

4.14%

Walgreens Health Services Division

143,899,330

4.01%

Aetna Pharmacy Management (APM)

98,047,580

2.73%

HealthTrans

90,000,000

2.51%

Prescription Solutions

89,536,793

2.49%

Prime Therapeutics, LLC

89,000,000

2.48%

CIGNA Pharmacy Management

75,000,000

2.09%

NMHC

44,000,000

1.23%

RxAmerica

42,290,739

1.18%

PharmaCare Management Services, Inc.

36,150,649

1.01%

RESTAT

24,000,000

0.67%

ScriptSave

17,000,000

0.47%

Pharmacy Services Group

15,000,000

0.42%

Catalyst Rx, a HealthExtras Company

13,500,000

0.38%

CBCA Rx

11,160,000

0.31%

PerformRx/AmeriHealth Mercy

9,771,216

0.27%

Health Resources, Inc.

8,390,000

0.23%

Navitus Health Solutions, LLC

8,000,000

0.22%

32 Other Pharmacy Benefit companies

44,791,552

1.25%

SOURCE: AIS's exclusive quarterly survey of pharmacy benefit management companies conducted by Drug Benefit News during the 2nd quarter of 2007.

METHODOLOGY: Survey conducted by AIS researchers and supplemented by publicly available information sources. Membership=lives covered under any/all pharmacy benefit contracts served by the company; members may be served by multiple contracts held by a single company or by multiple companies, and so may be counted more than once. Company market shares calculated as percentage of total industry-wide membership identified in this database.

Survey data updates are available to Drug Benefit News subscribers each quarter on request.