D4341 is the CDT code for periodontal scaling and root planing (SRP) on four or more teeth in a single quadrant — a therapeutic, non-surgical "deep cleaning" that removes plaque, calculus, and contaminated root deposits from below the gumline in patients with periodontal disease.
Informational only — confirm the official CDT descriptor and your payers' rules independently. This is general guidance, not billing, coding, or clinical advice.
When to Use the D4341 Code
Report D4341 when a clinician performs scaling and root planing on four or more teeth within one quadrant that show clinical evidence of periodontitis — typically probing depths of 4 mm or greater, radiographic bone loss, bleeding on probing, and subgingival calculus. SRP is a definitive therapeutic procedure, not a routine prophylaxis.
The companion code is D4342 for one to three teeth in a quadrant. Do not confuse D4341 with a routine adult prophylaxis (D1110), which is preventive and not coded by quadrant. Also distinguish it from D4355 (full mouth debridement) and surgical periodontal codes such as D4240 (gingival flap) or D4260 (osseous surgery), which are different procedures entirely.
Documentation & Clinical Scenarios
Scaling and root planing is one of the most scrutinized procedures in dental billing, so the chart must support a periodontal diagnosis and quadrant-by-quadrant treatment:
- Full periodontal charting with probing depths, recession, and bleeding points.
- Recent radiographs showing bone loss consistent with periodontitis.
- The specific teeth and quadrants treated, confirming four or more teeth per quadrant for each D4341 line.
- A periodontal diagnosis (e.g., generalized moderate periodontitis) and a narrative when the payer requests one.
A re-evaluation is usually documented several weeks later. Local anesthesia is generally part of the procedure; a follow-up periodontal maintenance visit (D4910) is billed separately once active therapy is complete.
Insurance & Billing Tips
- Verify periodontal benefits first. Confirm SRP coverage, any frequency limits, and whether the plan requires perio charting and radiographs with the claim.
- Bill by quadrant. Each quadrant with four or more qualifying teeth is its own D4341 line; quadrants with one to three teeth use D4342.
- Attach the evidence. Probing depths, bone-loss radiographs, and bleeding-on-probing notes support medical necessity and reduce denials.
- Watch down-coding. Payers sometimes down-code SRP to a prophylaxis; a strong perio chart supports an appeal.
- Mind the maintenance transition. After SRP, recall typically shifts to D4910, not D1110 — code for what is actually performed.
Example Case
A 52-year-old patient presents with bleeding gums and generalized 5–6 mm pockets. Full periodontal charting and radiographs confirm generalized moderate periodontitis with bone loss. The dentist treats all four quadrants, each with more than four involved teeth, over two visits — reported as four units of D4341. Charting, radiographs, and a periodontal diagnosis accompany the claim. Six weeks later a re-evaluation confirms improvement, and the patient is enrolled in periodontal maintenance under D4910.
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Frequently Asked Questions
What's the difference between D4341 and D4342?
Both are scaling and root planing; the difference is how many teeth in a quadrant are treated. D4341 is reported when four or more teeth in a quadrant qualify, while D4342 covers one to three teeth in a quadrant. Coding the wrong one — for example billing D4341 when only two teeth are involved — is a common error that triggers denials, so confirm the qualifying tooth count per quadrant before submitting.
Is D4341 the same as a regular cleaning?
No. A routine adult prophylaxis (D1110) is a preventive cleaning for a healthy mouth. D4341 is a therapeutic procedure for patients with diagnosed periodontitis — it removes calculus and biofilm from root surfaces below the gumline and is coded per quadrant. The two are not interchangeable, and a perio diagnosis with charting and radiographs is what supports D4341.
How often will insurance cover D4341?
Most plans cover scaling and root planing on a defined frequency, often allowing a quadrant to be retreated only after a set interval (commonly two to three years). Coverage typically requires documented probing depths, bone loss, and bleeding. Verify the specific plan's frequency and documentation requirements before treatment, since plans vary widely.
Does D4341 require pre-authorization?
Many payers recommend or require a pre-treatment estimate for SRP because it is frequently reviewed. Submitting periodontal charting and recent radiographs with the request confirms the diagnosis, establishes the patient's remaining benefit, and reduces the chance of a denial or a down-code to a prophylaxis.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.