It's a logo for a treatment plan with a clipboard with a paper. The clipboard is rectangular in shape and has a smaller rectangle on top to depict the clip. There is a piece of paper on the clipboard with a plus sign and vertical lines to show writing.
This Treatment icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,000 icons, all in the same style and quality.