The Law Offices Of Hiepler & Hiepler: Helping Accident And Injury Victims Throughout California We understand first hand the struggles families face when tragedy strikes. 20 years ago, founding attorney Mark Hiepler had to fight insurance companies after his sister, Nelene, was denied a potentially life saving bone marrow transplant by her HMO. If you or a loved one was seriously injured, or denied medical care by your HMO, we will fight to get you the resources you need to heal.