Registration and Identification of Physicians or Practitioners Who Opt Out

40.26 - Registration and Identification of Physicians or Practitioners Who Opt Out (Rev. 160, Issued: 10-26-12, Effective: 01-28-13, Implementation: 01-28-13) If the Medicare contractor has the physician’s/practitioner’s NPI, then the Medicare contractor should use it in order to identify opt-out physicians or practitioners nationwide. However, if the physician/practitioner does not have an NPI, then the Medicare contractor must use the physician’s or practitioner’s TIN to identify opt-out physicians or practitioners nationwide.