MCMCB Pro
S31.659D

S31.659DOpen bite of abdominal wall, unspecified quadrant with penetration into peritoneal cavity, subsequent encounter

Billable / specific codeICD-10-CMPOA exempt

S31.659D is a billable, specific ICD-10-CM code for open bite of abdominal wall, unspecified quadrant with penetration into peritoneal cavity, subsequent encounter. It is valid for submission on a claim.

7th character "D" — subsequent encounter

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

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

S31.659D does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

S31.659D is named in 1 Medicare coverage policy 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax

Related codes at this level

Codes that share S31.659. If S31.659D is not quite right, the correct code is usually one of these.

Questions about S31.659D

Is S31.659D a billable ICD-10-CM code?
Yes. S31.659D is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S31.659D sit in the tabular list?
Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.