Alphabetic Index FY2027

S31.020S

Laceration with foreign body of lower back and pelvis without penetration into retroperitoneum, sequela

FY2027Chapter 19: Injury, poisoning and certain other consequences of external causes/S30–S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals

BillableComplete code, valid to report
Care settingsHome Health Primary · Wound

S31.020S (also written S31020S) is a billable ICD-10-CM diagnosis code for laceration with foreign body of lower back and pelvis without penetration into retroperitoneum, sequela. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 558 codes in category S31 (Open wound of abdomen, lower back, pelvis and external genitals). The Alphabetic Index lists it under 2 entries. Its 7th character, S, means sequela. Its coding notes include a Use additional code instruction, a Code also instruction, 1 Excludes1 entry and 10 Excludes2 entries.

7th character

Category S31 requires a 7th character.

Assembled code S31.020S Open code

Guidelines tips

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

The 7th character depends on whether the patient is in active treatment, not on who sees the patient. An aftercare Z code is not used for injury aftercare.

Guidelines I.C.19.aInjuries: application of 7th charactersRead the official text

Each injury gets its own code unless a combination code exists, with the most serious injury first. Superficial injuries at the same site as a more severe injury are not coded. Injuries during medical care are coded as complications.

Guidelines I.C.19.bCoding of injuriesRead the official text

Use additional code

Add the listed code as a secondary code, if known.

Also from chapter/block level (1 note)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code also

Two codes may be needed to describe the condition. This note gives no sequencing order.

Inherited from S31 Open wound of abdomen, lower back, pelvis and external genitals

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from S31 Open wound of abdomen, lower back, pelvis and external genitals
  • traumatic amputation of part of abdomen, lower back and pelvis (S38.2-, S38.3)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from S31 Open wound of abdomen, lower back, pelvis and external genitals
  • open wound of hip (S71.00-S71.02)
  • open fracture of pelvis (S32.1--S32.9 with 7th character B)
Also from chapter/block level (8 notes)
Inherited from S30–S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
  • 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)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the Wound clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Includes

Further defines or gives examples of the content of the category.

Also from chapter/block level (6 notes)
Inherited from S30–S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
  • injuries to the abdominal wall
  • injuries to the anus
  • injuries to the buttock
  • injuries to the external genitalia
  • injuries to the flank
  • injuries to the groin

Inclusion terms

Conditions classified to this code.

Inherited from S31.020 Laceration with foreign body of lower back and pelvis without penetration into retroperitoneum
  • Laceration with foreign body of lower back and pelvis NOS

Notes

Also from chapter/block level (2 notes)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

Alphabetic Index terms

Terms the official Alphabetic Index lists for S31.020. This code adds the 7th character. 2 entries