2026 ICD-10-CM Diagnosis Code S31.542SPuncture wound with foreign body of unspecified external genital organs, female, sequela

ICD-10-CM Codes›S00–T88›S30-S39›S31

ICD-10-CM S31.542S
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

S31.542S is a billable ICD-10-CM diagnosis code for puncture wound with foreign body of unspecified external genital organs, female, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 742 through 743, 760 through 761. The code is exempt from POA reporting. Coders also document this condition as fishing hook in genitalia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury, sequela.

Code Identity

ICD-10-CM Code
S31.542S
Billable Status
Yes — Valid for Submission
Code Describes
Puncture wound with foreign body of unspecified external genital organs, female, sequela
Short Description
Pnctr w fb of unsp external genital organs, female, sequela
Parent Code
S31.542
Puncture wound with foreign body of unspecified external genital organs, female

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS30-S39Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
CategoryS31Open wound of abdomen, lower back, pelvis and external genitals
This CodeS31.542SPuncture wound with foreign body of unspecified external genital organs, female, sequela

Present on Admission (POA)Billing

S31.542S is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Fishing hook in genitalia
  • Fishing hook in trunk

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Open wound of abdomen, lower back, pelvis and external genitals (S31). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ073
Injury, sequela
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Foreign Bodies

If you've ever gotten a splinter or had sand in your eye, you've had experience with a foreign body. A foreign body is something that is stuck inside you but isn't supposed to be there. You may inhale or swallow a foreign body, or you may get one from an injury to almost any part of your body.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S31.542S to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
908.2 Late eff int injury NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About S31.542SOverview

Is S31.542S a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report puncture wound with foreign body of unspecified external genital organs, female, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character S in S31.542S mean?

The final character S makes this a sequela code: it reports a lingering problem that remains after the puncture wound with foreign body of unspecified external genital organs, female itself has resolved, not the original event.

What MS-DRG does S31.542S group to?

When puncture wound with foreign body of unspecified external genital organs, female, sequela is the principal diagnosis on an inpatient stay, it groups to MS-DRG 742, 743, 760, 761, with relative weights from 0.5696 to 1.8348 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S31.542S exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for puncture wound with foreign body of unspecified external genital organs, female, sequela on inpatient claims.

What is the ICD-9 equivalent of S31.542S?

Under the General Equivalence Mappings, puncture wound with foreign body of unspecified external genital organs, female, sequela converts to ICD-9-CM 908.2 (late eff int injury NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.