HCPCS Level II code T1001 denotes a nursing assessment/evaluation performed by a licensed nurse to document a patient’s clinical status and support care planning. As a non-physician assessment code, T1001 is used across multiple care settings where nursing evaluations are integral to care coordination, including home health, long-term care, outpatient clinics, and community-based services. The code’s use matters nationally because nursing assessments are foundational to patient safety, care transitions, and value-based payment models that emphasize coordinated, multidisciplinary care.

This analysis covers common national payers: Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of billing and coverage context, comparative benchmarks where available, typical clinical scenarios for use, and notes on documentation and service settings. The publication also summarizes policy considerations relevant to payer coverage and claims processing for nursing assessment services, and highlights where data is not available in the input. Information is presented to inform coding accuracy, billing workflows, and administrative review across national payers.