D0180 — Comprehensive Periodontal Evaluation
D0180 is a thorough exam focused on the gums and supporting bone, used for patients who show signs of periodontal disease or carry risk factors for it.
D0180 is the exam you get when the gums are the problem. It contains everything a comprehensive evaluation does, plus a genuinely detailed periodontal work-up: six probing depths per tooth, recession measurements, bleeding and suppuration points, furcation involvement on molars, tooth mobility, attachment loss calculated from the readings, and a staged periodontal diagnosis at the end of it.
It is reserved for patients with signs or risk factors — visible bleeding, pocketing, bone loss on radiographs, a family history, diabetes, or smoking. Using it as a routine new-patient exam for someone with healthy gums is the usual reason it gets denied.
What the numbers mean
The probe readings are the heart of it. A healthy sulcus measures one to three millimetres and does not bleed. Four millimetres with bleeding suggests inflammation that has started to break down attachment. Five and above is established periodontitis, and readings of seven or more usually mean the tooth has lost a substantial share of its support.
Those numbers are not just a diagnosis, they are the thing that determines which treatment code is legitimate afterwards. A patient with generalised five-millimetre pockets and radiographic bone loss needs scaling and root planing (D4341); a patient with generalised bleeding but no attachment loss needs full-mouth scaling for inflammation (D4346); a patient with neither needs a routine cleaning (D1110). Insurers check that the charting supports whichever one was reported.
Where it leads
A comprehensive periodontal evaluation ends with a plan rather than a treatment. Typical next steps are quadrant scaling and root planing, sometimes localised antibiotic delivery (D4381) in stubborn pockets, a re-evaluation (D0170) six to eight weeks later, and then a shift from six-month cleanings to three- or four-month periodontal maintenance (D4910) for life.
That last part is the piece patients most often miss. Periodontitis is managed, not cured, and the maintenance interval is the main thing standing between a stabilised mouth and further bone loss.
Questions about D0180
What is a comprehensive periodontal evaluation?
A detailed assessment of the gums and supporting bone — six probing depths per tooth, recession, bleeding, mobility and furcation findings — ending in a periodontal diagnosis.
Why did I get D0180 instead of D0150?
Because you showed signs or risk factors for gum disease, so the exam was weighted towards periodontal charting and diagnosis.
Is D0180 covered by insurance?
Usually, at the diagnostic rate and with the same roughly three-year frequency limit as a comprehensive exam. Charting that supports a periodontal diagnosis is what gets it paid.
What probing depth is considered unhealthy?
One to three millimetres without bleeding is healthy. Four with bleeding suggests active inflammation, and five or more generally indicates periodontitis.
Also known as: periodontal charting, probing depths, gum disease exam, perio evaluation, attachment loss.