These doctors pay their patients' bills.
D003363:Cost Control; D007348:Insurance, Health / Q000458:organization & administration*; D007349:Insurance, Health, Reimbursement / Q000458:organization & administration*; D010350:Patient Credit and Collection; D010820:Physicians; D011320:Primary Health Care / Q000191:economics*; D012017:Referral and Consultation; D014861:Washington