CPT code 94668 denotes manual chest physical therapy used to mobilize pulmonary secretions through subsequent chest wall manipulation. This hands-on respiratory therapy is clinically important for patients with retained secretions, impaired cough, or conditions that compromise airway clearance, and it is performed across inpatient and outpatient settings. Nationally, recognition of this service affects coverage decisions, care pathways for respiratory patients, and billing practices for rehabilitation and acute care providers. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what CPT code 94668 represents, payer coverage context, and the clinical scenarios in which the service is typically used. The publication also outlines benchmarking and policy-related considerations where available, and clarifies coding context and service line placement. Data not available in the input is noted where applicable.