OASIS-C1/ ICD-9 Version is Effective January 1 - September 30, 2015.
A modified version of OASIS-C1 (referred to as “OASIS-C1/ ICD-9 Version.”) has been created. In this version of OASIS-C1,
The 5 items that use ICD-10 codes (i.e. - M1011, M1017, M1021, M1023, M1025) were removed and replaced with the corresponding items ICD-9 based items from OASIS-C (i.e. – M1010, M1016, M1020, M1022, M1024).
