Yes, claim the recovery the same way you claimed the expense.
If you claimed the expense on your Schedule C, claim the rebate as income. List it as "Miscellaneous" and name it "Premium Rebate" so the IRS will understand if they look at the return.
According to the IRS:
"A recovery is a return of an amount you deducted or took a credit for in an earlier year. The most common recoveries are refunds, reimbursements, and rebates of itemized deductions. You may also have recoveries of nonitemized deductions (such as payments on previously deducted bad debts) and recoveries of items for which you previously claimed a tax credit."
"Total recovery included in income. If you recover an amount that you deducted in an earlier year when you were figuring your AGI, you must generally include the full amount of the recovery in your income in the year received."
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