ICD-10 Code K05.5 – Other periodontal diseases (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K05.5 – Other periodontal diseases
What it is
K05.5 identifies periodontal disease that does not fit a more specific gingival or periodontal diagnosis. Use it for documented periodontal conditions affecting supporting tissues of the teeth when the record is nonspecific.
Clinical signs
Clinical features vary; refer to documentation. Findings may include inflamed gums, periodontal pocketing, attachment loss, or bone changes, but only when the chart supports a nonspecific periodontal disorder.
When to use this code
Use K05.5 when the provider documents an “other” periodontal condition and no more specific periodontal code applies. It is appropriate for atypical or mixed periodontal disease descriptions that are not otherwise classified. Check documentation if the record names a specific subtype.
Do not use for
Do not use it for gingivitis, periodontitis, or other clearly named periodontal diagnoses when a specific code is available. Avoid it if the documentation is incomplete and the condition cannot be confirmed.
Coding tip
Match the code only to the provider’s exact periodontal wording; if the diagnosis is vague, query for clarification.