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ICD-10-CM 2027 diagnosis code

S31.522ALaceration with foreign body of unspecified external genital organs, female, initial encounter

✓ Billable / specificRequires 7th characterFemale only

S31.522A is a valid, billable ICD-10-CM code for laceration with foreign body of unspecified external genital organs, female, initial encounter. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Lac w fb of unsp external genital organs, female, init

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 S31.522A

S31.522A is the ICD-10-CM diagnosis code for laceration with foreign body of unspecified external genital organs, female, initial encounter. 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 billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

The 7th character "A" means initial encounter: use it while the patient is receiving active treatment for the condition.

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC, relative weight 1.8456), DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC, relative weight 1.2974), DRG 760 (Menstrual and Other Female Reproductive System Disorders with CC/MCC, relative weight 1.0129), DRG 761 (Menstrual and Other Female Reproductive System Disorders without CC/MCC, relative weight 0.7041), DRG 963 (Other Multiple Significant Trauma with MCC, relative weight 2.6363), DRG 964 (Other Multiple Significant Trauma with CC, relative weight 1.4972) and 1 more, in MDC 13 (Diseases and Disorders of the Female Reproductive System) and MDC 24 (Multiple Significant Trauma), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It is on the CMS list of diagnoses consistent only with female patients (the sex-conflict edit itself was retired in FY2025).

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

Before ICD-10, this condition was coded in ICD-9-CM as 878.9 (open wound of other and unspecified parts of genital organs (external), complicated).

7th character

Ainitial encounter

Other encounter types for S31.522:

Notes that apply from higher levels

Instructions written at a parent level also apply to S31.522A.

› From S31.5 Open wound of unspecified external genital organs
Excludes1
  • traumatic amputation of external genital organs (S38.21, S38.22)
› 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
Code also

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.

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

ICD-9-CM equivalent

Converter →
  • 878.9Open wound of other and unspecified parts of genital organs (external), complicatedapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about S31.522A

Is S31.522A billable?

Yes. S31.522A is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

What does the "A" at the end of S31.522A mean?

It is the 7th character for initial encounter. Per the official guidelines, use it while the patient is receiving active treatment for the condition.

Can S31.522A be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict S31.522A as a principal diagnosis.

Is S31.522A a CC or MCC?

No. S31.522A is neither a CC nor an MCC under MS-DRG v44.0.

What DRG does S31.522A group to?

S31.522A is used in the MS-DRG v44.0 logic for MS-DRG 742 (Uterine and Adnexa Procedures for Non-Malignancy with CC/MCC), MS-DRG 743 (Uterine and Adnexa Procedures for Non-Malignancy without CC/MCC), MS-DRG 760 (Menstrual and Other Female Reproductive System Disorders with CC/MCC), MS-DRG 761 (Menstrual and Other Female Reproductive System Disorders without CC/MCC), MS-DRG 963 (Other Multiple Significant Trauma with MCC), MS-DRG 964 (Other Multiple Significant Trauma with CC) and 1 more. Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for S31.522A?

The CMS General Equivalence Mappings map S31.522A to ICD-9-CM 878.9.