ICDcodes.org
FY2027

S31.603S — Unspecified open wound of abdominal wall, right lower quadrant with penetration into peritoneal cavity, sequela

BillableUnspecified

Is S31.603S billable?

Yes, but S31.603S is an unspecified code. S31.603S is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S31.603S is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting S31.603S — the more specific alternatives are listed below.

S31.603S at a glance

CodeS31.603S
DescriptionUnspecified open wound of abdominal wall, right lower quadrant with penetration into peritoneal cavity, sequela
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027
7th character "S"sequela

What does the 7th character "S" mean in S31.603S?

In S31.603S, the 7th character S means sequela. The 7th character is required for S31.603S to be a valid, complete code.

Same condition, different episode of care — switch the 7th character:

Which MS-DRGs does S31.603S group to?

S31.603S sits in MDC 09 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 604Trauma to the Skin, Subcutaneous Tissue and Breast with MCCmedical
  • 605Trauma to the Skin, Subcutaneous Tissue and Breast without MCCmedical

How is S31.603S listed in the Alphabetic Index?

The Alphabetic Index lists these routes under S31.603, the nearest indexed parent of S31.603S. Use them to find the family, then select the specific code.

  • Wound, open › right › lower quadrant › with penetration into peritoneal cavity
  • Wound, open › abdomen, abdominal › wall › right › lower quadrant › with penetration into peritoneal cavity

Excludes1 — never code together — inherited from S31

The conditions below can never be reported together with S31.603S on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

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

Use additional code — inherited from Chapter 19

Report an additional code alongside S31.603S to fully describe the condition. S31.603S is sequenced first.

  • code to identify any retained foreign body, if applicable (Z18.-)

Excludes2 — not included here — inherited from Chapter 19

The conditions below are not part of S31.603S, but a patient may have both at the same time. When documentation supports it, S31.603S and the excluded code may both be reported.

  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

Excludes2 — not included here — inherited from S30-S39

The conditions below are not part of S31.603S, but a patient may have both at the same time. When documentation supports it, S31.603S and the excluded code may both be reported.

  • burns and corrosions (T20-T32)
  • effects of foreign body in anus and rectum (T18.5)
  • effects of foreign body in genitourinary tract (T19.-)
  • effects of foreign body in stomach, small intestine and colon (T18.2-T18.4)
  • frostbite (T33-T34)
  • insect bite or sting, venomous (T63.4)

Excludes2 — not included here — inherited from S31

The conditions below are not part of S31.603S, but a patient may have both at the same time. When documentation supports it, S31.603S and the excluded code may both be reported.

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

Code also — inherited from S31

Two codes may be needed to describe the condition fully. Whether S31.603S is sequenced first depends on the reason for the encounter.

How long has S31.603S existed?

S31.603S has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.