CPT code 11952 denotes the injection of 5.1 cc to 10.0 cc of collagen into the subcutaneous layer of skin, a soft-tissue augmentation procedure commonly used for contour correction and cosmetic volume restoration. Nationally, this code matters for procedures performed in outpatient dermatology and plastic surgery settings and for payers managing coverage and coding for injectables and biomaterial implants. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical service represented by the code, payer coverage scope, and the typical sites of service. The publication also summarizes common billing modifiers associated with this service and highlights relevant areas for coding accuracy and claims processing. Where available, benchmarks for utilization and payer-specific policy notes are provided to help billing and clinical teams align documentation and claim submission with payer expectations. Data not available in the input will be clearly identified in corresponding sections of the full publication.