Careful: NPM _says_ they're up (https://status.npmjs.org/) but I am seeing a lot of packages not updating and npm install taking forever or never finishing. So hold off deploying now if you're dependent on that.
They've acknowledged an issue now on the status page. For me at least, it's completely down, package installation straight up doesn't work. Thankfully current work project uses a pull-through mirror that allows us to continue working.
