Sextant

In dental terminology, a sextant is one of six divisions of the dental arches used to organize clinical findings and treatment planning. The maxillary and mandibular arches are each divided into three sections: right posterior, anterior, and left posterior. This system provides a standardized framework for recording periodontal measurements, documenting disease severity by region, and planning phased treatment approaches. Sextant-based charting is particularly important in periodontology, where the extent and severity of disease often varies significantly across different areas of the mouth.

The sextant system has direct implications for dental billing because several CDT procedure codes are defined on a per-sextant basis. Scaling and root planing, for example, is typically coded and billed per quadrant but certain periodontal procedures and localized treatments reference sextant divisions. Billing the correct number of sextants requires that the clinical documentation, including periodontal charting with probing depths, bleeding on probing, and clinical attachment levels, clearly supports the areas treated. Submitting claims for sextants that lack documented disease indicators is a compliance risk that can result in post-payment audits, recoupment demands, or fraud allegations.

For dental practices, understanding sextant-based billing also affects treatment sequencing and patient financial planning. When a patient requires periodontal treatment across multiple sextants, the treatment may be phased across several appointments, with each visit addressing a specific number of sextants. This phased approach impacts scheduling, per-visit billing amounts, and how patient copayments are collected at each appointment. Clear communication with patients about sextant-by-sextant treatment plans helps set expectations for both the clinical timeline and the financial obligation associated with each phase of care.