CPT code 90958 denotes monthly comprehensive management of end stage renal disease (ESRD) for adolescents aged 12 to 19 who require coordinated outpatient care. It matters nationally because ESRD management carries substantial clinical complexity, utilization of specialty services, and coordination needs across nephrology, dialysis teams, and supportive care — making accurate coding important for care continuity and payment. Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will learn the clinical scope and service setting for 90958, common modifiers used in practice, payer coverage considerations, and how this code fits into ESRD care delivery. The publication outlines typical site-of-service implications for outpatient clinics and dialysis centers, clarifies patient age criteria and encounter frequency expectations, and summarizes how 90958 is applied in monthly care reporting. Data not available in the input for associated taxonomies, specific ICD-10 mappings, related CPT codes, and detailed payer policy variations.