No phone and perfect job for introverts as you’re left alone to audit. There’s tons of divisions, COB, clinical chart validation, pharmacy, data mining (inpatient claims), HEDIS and FWA divisions. They do audits based on patient health data and clinical chart review.
Places like Equian (Change/Optum/UHC), Rawlings, Cotiviti (HMS) are so much better for what you’re looking for especially considering your nursing background. I’d recommend going into third party vendor auditing.