SAN DIEGO-Avon, Conn.-based Value Health, which provides specialty managed-care benefit programs and healthcare information services, and Minneapolis-based Northwestern National Life Insurance Co. are teaming up to offer an HMO in California. The HMO, to be called Value Health Plan, will be owned and operated by Community Care Network, a Value Health subsidiary. It will be the first HMO for CCN, which develops and operates integrated managed-care systems for group health and workers' compensation payers in 37 states. It also will be Northwestern National's first HMO in California. CCN expects the HMO to begin operating in Southern California in early 1996, pending regulatory approval. The HMO initially will be offered to groups of 100 or more enrollees. Plans are to market the HMO to smaller groups through a second insurance car-rier. Northwestern National, a subsidiary of ReliaStar Financial Corp., has managed-care arrangements in regional markets nationwide.