ICD-10-CM 2027 diagnosis code

S31.83Open wound of anus

Not billable — use a more specific codeRequires 7th character

S31.83 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S31.83

S31.83 is the ICD-10-CM diagnosis code for open wound of anus. It belongs to category S31 (open wound of abdomen, lower back, pelvis and external genitals), block S30-S39 (injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within S31.8 (open wound of other parts of abdomen, lower back and pelvis), S31.83 is specifically for open wound of anus. Related codes cover unspecified buttock (S31.80), right buttock (S31.81) and left buttock (S31.82).

Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

7th character

The appropriate 7th character is to be added to each code from category S31

Ainitial encounter
Dsubsequent encounter
Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S31.83.

› From S31 Open wound of abdomen, lower back, pelvis and external genitals

Excludes1

traumatic amputation of part of abdomen, lower back and pelvis (S38.2-, S38.3)

Excludes2

open wound of hip (S71.00-S71.02)
open fracture of pelvis (S32.1--S32.9 with 7th character B)

Code also

any associated:
spinal cord injury (S24.0, S24.1-, S34.0-, S34.1-)
wound infection

Broader instructions also apply from S30-S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about S31.83

Is S31.83 billable?: No. S31.83 is a header code. Report one of its more specific subcodes instead.