The document provides guidance on coding and billing for end-stage renal disease (ESRD) services. It discusses: 1) New ESRD CPT codes 90951-90970 that replaced G codes and older CPT codes for capturing physician work related to dialysis patients. 2) Guidelines for billing monthly or daily codes based on whether it is for a full or partial month of service. 3) Requirements for documentation of ESRD services to support billing codes. 4) Rules around billing for teaching physicians, hospitalization, home dialysis training, infusion codes, and consultations vs. referrals.