A code to describe to describe specific event(s) relating to this billing period covered by the claim. These codes are associated with specific date(s); refer to the occurrence code start (OCRNC_CD_START_DT) and end dates (OCRNC_CD_END_DT).
There may be one or more occurrence codes that relate to a particular claim; refer to the occurrence code sequence number (OCRNC_CD_SEQ).
Values and websites referenced may change over time. Refer to https://www.cms.gov/Regulations-andGuidance/Guidance/Transmittals/Downloads/R81CP.pdf
SOURCE: T-MSIS Analytic File (TAF) Claims