A referred ambulatory patient is one who is treated and/or diagnosed in an ancillary service area of a hospital upon referral and who does not meet the definition criteria for an emergency outpatient or the clinical outpatient. A referral of an emergency or clinical outpatient to an ancillary service area does not change the classification of the patient to referred outpatient status.
N.Y. Comp. Codes R. & Regs. Tit. 10 § 441.279