Patients with a first PMBCL ICD-10-CM diagnosis (with or without an antecedent ICD-10-CM diagnosis of DLBCL/other lymphoma, which may have been assigned before PMBCL confirmation) after 10/01/2015 (index date) and no ICD-9-CM diagnosis code for unspecified PMBCL/DLBCL were identified as ...
We based our translation of cases coded in ICD-O-2 into the proposed nested classification on the SEER conversion algorithm, taking into account the findings of Clarke et al.32,40 For example, ICD-O-3 code 9675 (malignant lymphoma, mixed small and large cell, diffuse) was placed in the ...