A Certificate of Waiver allows certain laboratories to perform waived tests without the need for CLIA certification. These tests are considered to have a low risk of error and can be performed by qualified individuals in a variety of settings, such as physician offices and clinics. A Certificate for Provider Performed Microscopy Procedures (PPM), on the other hand, allows individual healthcare professionals to perform certain microscopy procedures on their own patients in their offices or clinics. These procedures include urinalysis, cytology, and hematology tests. It is important to note that even with a Certificate of Waiver or PPM, laboratories and healthcare professionals must still follow all applicable state and federal regulations.