JOHNSTOWN — Dr. John H. Johnson, an Altoona anesthesiologist, entered guilty pleas Thursday to conspiracy to defraud Medicare and Medicaid and failure to remit payroll taxes for employees of his doctor’s office and a local car wash business, Johnny On The Spot. The charges will land Johnson in a federal prison for seven years. U.S. District Judge Kim R. Gibson accepted the guilty pleas and the agreement for jail time but ordered a presentence investigation. Gibson set Oct. 11 for the formal sentencing, although that could change because Johnson’s attorney, John P. Pierce of ...