Effective January 1, 2014 Medicare contractors are required to issue a notice of Medicare redetermination after an appeal is requested in accordance with 42 CFR Section 405.956. One of the elements in the MRN is the beneficiary’s HICN (Health Insurance Claim Numbers). To ensure that contractors protect personally identifiable information, the Centers for Medicare & Medicaid Services (CMS) is requesting that all contractors redact the HICNs in the MRNs. The HICNs will be redacted by replacing 5 or more values of the HICN with Xs or asterisks (*) with the last 4 or 5 digits of the HICN displayed. This applies to HICNs with both alpha and numeric digits.
Reference: MM8268 / CR 8268