The Provider Enrollment, Chain and Ownership System (PECOS).
D019992:Databases as Topic; D006801:Humans; D007349:Insurance, Health, Reimbursement / Q000331:legislation & jurisprudence; D020407:Internet; D006278:Medicare / Q000331:legislation & jurisprudence*; D010067:Ownership; D012017:Referral and Consultation / Q000331:legislation & jurisprudence; D014481:United States