DICOM PS3.3 2019c - Information Object Definitions
A.34.7.4.7 Waveform Annotation Module

The Defined CID for the Concept Name Code Sequence (0040,A043) in the Waveform Annotation Sequence (0040,B020) shall be CID 3339 “Electrophysiology Annotations”.

DICOM PS3.3 2019c - Information Object Definitions