ICD-10-CM diagnosis code
S02.42XK Fracture of alveolus of maxilla, subsequent encounter for fracture with nonunion
- Billable
- Yes, a complete code (FY2026)
Encounter (7th character)
This code is for a subsequent encounter: active treatment is complete and the patient is being seen during healing or recovery (for example a cast change, medication adjustment or follow-up visit).
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Other codes in S02
456 complete codes in this category.
- S02.413KLeFort III fracture, subsequent encounter for fracture with nonunion
- S02.413SLeFort III fracture, sequela
- S02.42XAFracture of alveolus of maxilla, initial encounter for closed fracture
- S02.42XBFracture of alveolus of maxilla, initial encounter for open fracture
- S02.42XDFracture of alveolus of maxilla, subsequent encounter for fracture with routine healing
- S02.42XGFracture of alveolus of maxilla, subsequent encounter for fracture with delayed healing
- S02.42XKFracture of alveolus of maxilla, subsequent encounter for fracture with nonunion
- S02.42XSFracture of alveolus of maxilla, sequela
- S02.5XXAFracture of tooth (traumatic), initial encounter for closed fracture
- S02.5XXBFracture of tooth (traumatic), initial encounter for open fracture
- S02.5XXDFracture of tooth (traumatic), subsequent encounter for fracture with routine healing
- S02.5XXGFracture of tooth (traumatic), subsequent encounter for fracture with delayed healing
Documentation tips
- Make sure the note supports every element of the title, “Fracture of alveolus of maxilla, subsequent encounter for fracture with nonunion”: 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 S02.
The international WHO ICD-10 also has S02, 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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