The one-line difference

• D4341 – periodontal scaling and root planing, four or more teeth per quadrant
• D4342 – periodontal scaling and root planing, one to three teeth per quadrant

Count the teeth actually requiring SRP in that quadrant – teeth with attachment loss and subgingival calculus – not every tooth present. Three affected teeth in an otherwise healthy quadrant is D4342, even if you touched other teeth with an instrument.

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What SRP is (and what it isn't)

Scaling and root planing is therapeutic treatment for periodontitis: removing plaque and calculus from below the gumline and smoothing root surfaces so tissue can reattach. It's distinct from a prophylaxis (D1110), which is preventive care for a periodontally healthy mouth, and from perio maintenance (D4910), which follows completed active therapy.

That distinction is exactly why documentation matters. SRP is justified by disease – and disease must be visible in the record before the procedure happens.

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The evidence: what must exist before you scale

A complete periodontal chart. Six sites per tooth, with probing depths of 4mm+ in the treated areas, bleeding on probing, and attachment loss. A partial or outdated chart can't support a quadrant-level therapy decision. This is where most documentation gaps start – and where voice charting closes them, because a full chart in under 5 minutes removes the reason charts get skipped. Our periodontal charting guide covers the exam itself.

The stakes here aren't only clinical — they're financial. As one dentist reminded us, complete perio scores are often what stands between you and payment: "A lot of insurance companies expect you to send the perio scores before they make a determination about additional units of scaling, or even approval for crowns." If the chart isn't there, the claim stalls.

Radiographic bone loss. Current images showing the bone picture that matches the probing story.

A periodontal diagnosis. Stage and grade under the AAP classification, recorded in the chart – not just implied by the treatment.

The chart is the evidence – pocket depths and bleeding recorded in Denti.AI Voice Perio.

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The procedure note: what to record on the day

A defensible SRP note states:

• Diagnosis – stage and grade, with the supporting findings referenced
• Quadrant(s) treated and the specific teeth – this is what separates D4341 from D4342, so name the teeth
• Anesthesia – agent, concentration, carpules, technique
• Instrumentation – ultrasonic and hand instruments, to what endpoint (roots planed smooth)
• Tissue response and patient tolerance
• Home care instruction given
• Next steps – remaining quadrants scheduled, and the re-evaluation appointment 4-6 weeks after completion

Copy the ready-made SRP note template – or let Denti.AI Scribe generate the note from the visit itself, with the quadrant, teeth, and anesthesia captured as you narrate the procedure naturally.

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The re-evaluation: the step that proves it was therapy

SRP without a documented re-evaluation looks like a cleaning with a different name. The 4-6 week re-eval – a new perio chart compared against the baseline – is what demonstrates therapeutic intent and measures the result. Pocket reduction and reduced bleeding confirm response; persistent deep sites justify the next step, whether that's site-specific retreatment or referral.

This is also where voice charting quietly changes the economics: when a re-eval chart takes 5 minutes instead of 15, it actually happens on schedule, and your before/after story is complete in the record. It's the same effect practices see on case acceptance — as one hygienist, Diane McCabe, RDH, told us, a fast, clear perio workflow means "our acceptance rate has soared."

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Common documentation mistakes

Counting teeth loosely. "UR quadrant SRP" without naming teeth leaves the D4341/D4342 question unanswerable later. Charting after treating. The perio chart must predate the therapy decision – evidence gathered after the fact reads backwards. Skipping the diagnosis line. Depths alone aren't a diagnosis; write the stage and grade. No re-eval on the books. Schedule it in the same note that documents the final quadrant.

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FAQ

Can D4341 and D4342 be used in the same mouth? Yes – each quadrant is coded by its own tooth count. Two quadrants with five affected teeth each and one with two affected teeth would be two D4341s and one D4342.

How many quadrants can be treated per visit? Clinically, whatever the patient tolerates and time allows – commonly one or two. Document each quadrant's teeth separately regardless.

What probing depths support SRP? There's no single magic number, but 4mm+ pockets with bleeding and radiographic bone loss form the typical picture of the periodontitis that SRP treats. The full charted pattern matters more than one measurement.

The chart is the evidence and the note is the defense – and both can be done in the time the exam already takes.

Book a free demo of Denti.AI to see Voice Perio and Scribe document an SRP case end to end.