Patient presents with generalized Stage III, Grade B periodontitis. Probing depths of 6–8mm on teeth #14–17 with bleeding on probing at 78% of sites. Radiographic evidence of 30–50% alveolar bone loss. Phase I therapy (D4341) completed 10/2025 with re-evaluation 12/2025 showing inadequate response. Osseous resection/recontouring required to eliminate infrabony defects and establish maintainable architecture.

D4341 is a distinct therapeutic service from D1110 (prophylaxis) and is not duplicative. Patient's most recent prophylaxis (D1110) was completed 03/2025. Current presentation includes generalized 4–6mm pockets with subgingival calculus, BOP at 65% of sites, and Class II furcation involvement on #3, #14. D4341 constitutes root debridement and detoxification below the CEJ — a fundamentally different procedure scope.

Bone replacement grafting (D4263) is a well-established, evidence-based procedure with 40+ years of peer-reviewed literature supporting its use in treating intrabony periodontal defects. Per AAP Position Paper (2015) and JADA systematic reviews, guided bone regeneration achieves predictable clinical attachment level gains. This procedure is not experimental under current ADA guidelines. Payer policy language citing "investigational" status is inconsistent with the scientific consensus.