D4341 Dental Code: Scaling and Root Planing (4+ Teeth) Billing Guide

What D4341 covers

D4341 reports scaling and root planing in a quadrant with four or more teeth involved. The procedure removes plaque, calculus, and bacterial toxins from the root surfaces below the gumline. It is active periodontal therapy, distinct from a prophylaxis (D1110) and from periodontal maintenance (D4910).

To bill D4341, the quadrant should have at least four teeth that meet the SRP threshold. Most carriers define the threshold as pocket depths of 4mm or greater with bleeding on probing and radiographic evidence of bone loss. The clinical record should support a periodontitis diagnosis, not just gingivitis.

It does not cover:

• One to three teeth in a quadrant. Use D4342.
• A patient with full-mouth gingivitis but no bone loss. Use D4346.
• Maintenance recall after active therapy. Use D4910.
• Full-mouth debridement for a patient who can’t be evaluated until calculus is removed. Use D4355.

When to bill D4341

Bill D4341 when:

• A quadrant has four or more teeth with pocket depths of 4mm or greater.
• Those teeth show bleeding on probing.
• Radiographs show bone loss consistent with periodontitis.
• The diagnosis is periodontitis, not gingivitis.

Do not bill D4341 for:

• A quadrant with fewer than four qualifying teeth. Use D4342.
• A patient with isolated 4mm pockets and no other perio signs. Generally the case is gingivitis (D4346) or a prophy.
• Recall visits after the patient has completed active SRP therapy. Use D4910.

Top reasons D4341 gets denied

1. Perio chart gaps. The submitted chart doesn’t show pocket depths, bleeding on probing, or both. Carriers reject claims that lack basic documentation.
2. No radiographic bone loss. The films don’t support periodontitis. The case might be gingivitis (D4346) but was coded as SRP.
3. Frequency exceeded. The quadrant had SRP within the carrier’s lookback window (often 24 months). The carrier denies.
4. Quadrant designation wrong. The teeth charted as the upper-right quadrant don’t match the quadrant billed on the claim. A common bookkeeping error.
5. Pre-determination required. Some plans require predetermination on perio claims. A claim submitted without it pends or denies pending predet.
6. Diagnosis-procedure mismatch. The chart shows gingivitis, the claim shows SRP. The carrier corrects to D4346 or denies.

What goes in an audit-proof perio chart

Most D4341 denials are documentation problems, not clinical problems. The chart that survives an audit shows, for the affected quadrant:

• Probing depths at six sites per tooth (mesio-buccal, buccal, disto-buccal, mesio-lingual, lingual, disto-lingual).
• Bleeding on probing marked at each site where it occurred.
• Recession measured if present.
• Mobility charted if present.
• Furcation involvement charted if present.
• Radiographic bone loss visible on the films, with a date the films were taken.
• Periodontal diagnosis documented in the chart note (generalized chronic periodontitis, localized aggressive periodontitis, etc.).

A perio chart that records only the worst pocket per tooth is not enough. Six-point charting is the standard the carrier expects.

Frequency and the four-quadrant cycle

Carriers typically pay SRP once per quadrant every 24 months. A patient with full-mouth periodontitis can have all four quadrants done as separate visits (or two appointments of two quadrants each), and each quadrant resets its own clock.

Some plans require a re-evaluation visit between quadrants. The re-evaluation is usually D0180 (comprehensive periodontal evaluation) or another perio code, not a separate D4341 line.

After active therapy completes, the patient transitions to D4910 maintenance, usually on a three-month recall.

D4341 versus D4342

The difference is purely the count of teeth in the quadrant that meet the SRP threshold:

• D4341: four or more teeth per quadrant.
• D4342: one to three teeth per quadrant.

The count is per quadrant, so a patient can have D4341 in one quadrant and D4342 in another at the same visit. Each quadrant is its own line on the claim and its own frequency clock.

Coding all four quadrants as D4341 when one of them really qualified as D4342 is a common over-statement. Carriers cross-reference against the perio chart and correct on audit.

Example case

A 47-year-old established patient presents for a comprehensive periodontal evaluation. The perio chart records 12 sites with 5mm or 6mm pockets across the upper-right and lower-left quadrants. Bleeding on probing is present at most of those sites. Bitewings and a panoramic show generalized horizontal bone loss of 2-3mm. The diagnosis is generalized chronic periodontitis, stage II.

Billing steps:

1. Document the six-point probing chart, bleeding on probing, and bone loss in the patient record.
2. Submit D0180 for the comprehensive perio evaluation.
3. Schedule the SRP as two separate appointments (one per quadrant pair) or four (one per quadrant), depending on practice protocol.
4. Submit D4341 with the perio chart and films attached for each quadrant that qualifies.
5. Watch for pre-determination requirements on the specific plan. If required, submit a pre-det before treatment starts.
6. Transition the patient to D4910 maintenance once active therapy is complete.

Documentation that supports the claim

The claim needs:

• Six-point perio chart with pocket depths and bleeding on probing.
• Recent radiographs showing bone loss.
• Quadrant designation matching the chart.
• A periodontitis diagnosis in the chart note, not just gingivitis.

If the carrier asks for additional information, it almost always asks for these four items. Having them ready on the initial submission keeps the claim out of the pending queue.

What to get right in your PMS

1. Complete six-point probing before submitting the claim. Selective charting is the most common reason carriers ask for “additional information.”
2. Attach the perio chart and radiographs to the claim. Many systems store the chart separately. The carrier needs them linked to the SRP claim.
3. Confirm the quadrant designation matches the charted teeth. Quadrant errors cause clean denials.
4. Submit predetermination when the plan requires it. Skipping the predet pends the claim and delays treatment.
5. Schedule the post-therapy maintenance under D4910, not D1110. Reverting to prophy after SRP undoes the documentation trail and creates problems later.