I was recently researching the physician signature requirements under the Medicare program and found this resource outlining some of key questions and answers around the requirements.
The Centers for Medicare & Medicaid Services Medicare Learning Network has issued a fact sheet on Comprehensive Error Rate Testing (CERT) Signature Requirements with the Q and A. Also mentioned in the guidance as a resourceis the Medicare Learning Network's MLN Matters Article MM6698, "Signature Guidelines for Medical Review Purposes."