EXHIBIT 18

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a buY

Nevada

Sutter

1

1

111

11111 1

Del Norte Crescent

City

Eureka-Arcata-Fortuna

Humboldt Trinity

Ukiah Mendocino

SANTA ROSA

San Rafael

Siskiyou

1

Red Bluff

Lake

NAPA

11 11 1

1 1

1 1 1 1 1 1 1 1 1 1 1 1

Riverside

Imperial San Diego

Los Angeles

Orange

EL CENTROSAN DIEGO CARLSBAD

LOS ANGELES LONG BEACH ANAHEIMSANTA MARIA-SANTA BARBARA

OXNARD-THOUSAND

OAKS-VENTURA

Anaheim Santa Ana Irvine

M E X I C O

IDAHO OREGON

Modoc

MSA’s where an Anthem-Cigna merger will beREDDING Shasta presumed likely to enhance market powerSusanville

Redding-Red Bluff

Lassen MSA’s where an Anthem-Cigna merger potentially raises signifcant competitive concerns

Tehama Plumas

CHICO Glenn SierraButte

Clear- Colusa YUBA Truckee-Grass Valley

lake CITY Placer Sacramento-Roseville SACRAMENTO--ROSEVILLE--ARDEN-ARCADE

El Dorado Yolo

Sonoma Napa Sacra Alpine mento Amador

1

MarinSAN FRANCISCO-Solano NEVADACalaveras SonoraSan

OAKLAND-HAYWARD Joaquin TuolumneContra Costa

San Francisco San Francisco-Redwood City-

South San Francisco

2 STOCKTON-LODI Mono

MODESTOAlameda Stanislaus Mariposa

San Jose-San Francisco-

MercedSanta Clara Modesto-

Oakland San Mateo 3

Merced Madera ± 0 20 40 60 80 KilometersMERCED Fresno-

SANTA CRUZ-WATSONVILLE MADERA Santa Cruz

Madera 0 20 40 60 80 Miles

Fresno InyoSan

Benito FRESNO VISALIA-

SALINAS PORTERVILLE Visalia-KEY TulareMonterey1 VALLEJO-FAIRFIELD Kings Porterville-

2 Oakland-Hayward-Berkeley HANFORD-3 SAN JOSE-SUNNYVALE-SANTA CLARA CORCORAN Hanford

ARIZONA

SAN LUIS OBISPO PASO ROBLES ARROYO GRANDE

San Luis Obispo BAKERSFIELD Kern Los Angeles Long Beach

RIVERSIDE SAN BERNARDINO ONTARIO Santa Barbara Los AngelesPacific Ocean

Long Beach San Bernardino Ventura Glendale