| ANTHEM BC/BS | AETNA |
| AARP | ASSURANT HEALTH |
| CDS | CIGNA |
| EQUITABLE | GEHA |
| GREAT WEST | HEAlTHCOMP |
| HOMETOWN HEALTH | HUMANA |
| MEDICARE/TRICARE | MUTUAL OF OMAHA |
| P5 | PACIFCARE |
| PEBP/STATE OF NEVADA | PERS |
| PRINCIPAL | ST. MARY'S |
| UNITED AMERICAN | UNITED HEALTHCARE |
| UNIVERSAL HEALTHCARE | USAA |
