SANTA FE, N.M. (AP) — An audit commissioned by the state estimated the government overpaid a mental health provider $655,800 because of improper billings, but the organization’s top executive said Friday the auditors were wrong.

The Counseling Center was among 15 nonprofit providers of mental health services that had their Medicaid payments suspended last summer because of the audit that alleged fraud, mismanagement and billing problems over more than three years.