ICD-10-CM diagnosis code
K04.90 Unspecified diseases of pulp and periapical tissues
- Billable
- Yes, a complete code (FY2026)
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Other codes in K04
12 complete codes in this category.
- K04.01Reversible pulpitis
- K04.02Irreversible pulpitis
- K04.1Necrosis of pulp
- K04.2Pulp degeneration
- K04.3Abnormal hard tissue formation in pulp
- K04.4Acute apical periodontitis of pulpal origin
- K04.5Chronic apical periodontitis
- K04.6Periapical abscess with sinus
- K04.7Periapical abscess without sinus
- K04.8Radicular cyst
- K04.90Unspecified diseases of pulp and periapical tissues
- K04.99Other diseases of pulp and periapical tissues
Documentation tips
- Make sure the note supports every element of the title, “Unspecified diseases of pulp and periapical tissues”: each detail in it should be traceable to the history, examination or assessment.
- Code to the highest specificity the documentation supports. If a detail is missing from the note, add it to the note rather than choosing a less specific code by default.
- Check the Tabular List and official guidelines for instructional notes (“code first”, “use additional code”, Excludes1/Excludes2) that apply to K04.
The international WHO ICD-10 also has K04, with its inclusion and exclusion notes; titles and detail can differ from ICD-10-CM.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
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