ICD-10-CM diagnosis code
S31.839A Unspecified open wound of anus, initial encounter
- Billable
- Yes, a complete code (FY2026)
Encounter (7th character)
This code is for the initial encounter: the patient is receiving active treatment for the condition (for example surgery, an emergency department visit or evaluation by a new clinician).
Documenting S31.839A? Write the note in seconds
Paste your rough notes and get a structured SOAP note. Free, no account needed.
Other codes in S31
558 complete codes in this category.
- S31.833APuncture wound without foreign body of anus, initial encounter
- S31.833DPuncture wound without foreign body of anus, subsequent encounter
- S31.833SPuncture wound without foreign body of anus, sequela
- S31.834APuncture wound with foreign body of anus, initial encounter
- S31.834DPuncture wound with foreign body of anus, subsequent encounter
- S31.834SPuncture wound with foreign body of anus, sequela
- S31.835AOpen bite of anus, initial encounter
- S31.835DOpen bite of anus, subsequent encounter
- S31.835SOpen bite of anus, sequela
- S31.839AUnspecified open wound of anus, initial encounter
- S31.839DUnspecified open wound of anus, subsequent encounter
- S31.839SUnspecified open wound of anus, sequela
Documentation tips
- Make sure the note supports every element of the title, “Unspecified open wound of anus, initial encounter”: 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 S31.
The international WHO ICD-10 also has S31, 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.
Look up another code
Stop looking codes up by hand
Docdemic listens to the consultation, writes the note and suggests the diagnosis and procedure codes that fit it, each one checked against your country’s official code list.
Try Docdemic free