Yes, they appear consistent with other US identification tags.
Some units have command policies requiring individuals to have extra plastic 'tags': Army Values, NCO creed, etc.. Some commands also require guys to carry laminated 'smart' cards: Command directives, values, etc. Generally, these policies originate at higher level commands (Division, etc) but when it gets down to the individual Company/Platoon/Squad level they are sometimes ignored.
Occasionally, guys have extra tags denoting allergies (red medical tags are common), or something personal and of religious significance.