Cool notebook! I really enjoy all these notebooks using publicly available healthcare data. The smaller cluster looks like Surgical/Orthopedic Hospitals, where the patients might be generally healthy but need an expensive, say, joint replacement. See here where I highlight the hospitals with "ortho" or "surg" in the name: https://observablehq.com/d/853c9c8a9de80c5b#cell-21

This is so cool, @Evan!