2027 ICD-10-CM Diagnosis Code K41.31Unilateral femoral hernia, with obstruction, without gangrene, recurrent

ICD-10-CM Codes›K00–K95›K40-K46›K41

ICD-10-CM K41.31
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

K41.31 is a billable ICD-10-CM diagnosis code for unilateral femoral hernia, with obstruction, without gangrene, recurrent. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 18 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abdominal hernia and Intestinal obstruction and ileus.

Code Identity

ICD-10-CM Code
K41.31
Billable Status
Yes — Valid for Submission
Code Describes
Unilateral femoral hernia, with obstruction, without gangrene, recurrent
Short Description
Unilateral femoral hernia, w obst, w/o gangrene, recurrent
Parent Code
K41.3
Unilateral femoral hernia, with obstruction, without gangrene

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK40-K46Hernia
CategoryK41Femoral hernia
This CodeK41.31Unilateral femoral hernia, with obstruction, without gangrene, recurrent

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Irreducible femoral hernia
  • Irreducible left femoral hernia
  • Irreducible right femoral hernia
  • Left recurrent femoral hernia
  • Obstructed left femoral hernia
  • Obstructed recurrent femoral hernia
  • Obstructed recurrent left femoral hernia
  • Obstructed recurrent right femoral hernia
  • Obstructed right femoral hernia
  • Recurrent femoral hernia with obstruction
  • Recurrent irreducible left femoral hernia
  • Recurrent irreducible right femoral hernia
  • Right recurrent femoral hernia

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K41.31: its own notes plus those printed at block K40-K46 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Includes

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

From Block K40-K46 Hernia applies to 45 codes
  • acquired hernia
  • congenital [except diaphragmatic or hiatus] hernia
  • recurrent hernia

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Notes

General instructions on how these codes are used.

From Block K40-K46 Hernia applies to 45 codes
  • Hernia with both gangrene and obstruction is classified to hernia with gangrene.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name K41.31, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming K41.31: its condition is not part of those codes, and both may be reported when the patient has both.

  • K56.7 Ileus, unspecified
    intestinal obstruction with hernia (K40-K46) names K40-K46, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

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

CCSR DIG010
Abdominal hernia
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DIG012
Intestinal obstruction and ileus
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Hernia, Femoral

    a groin hernia occurring inferior to the inguinal ligament and medial to the femoral vein and femoral artery. the femoral hernia sac has a small neck but may enlarge considerably when it enters the subcutaneous tissue of the thigh. it is caused by defects in the abdominal wall.

Patient EducationClinical

Hernia

A hernia happens when part of an internal organ or tissue bulges through a weak area of muscle. Most hernias are in the abdomen.

Read the full article at MedlinePlus

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

Convert K41.31 to ICD-9-CMHistory

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

ICD-9-CM
552.01 Rec unil fem hern w obst
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K41.31Overview

Is K41.31 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unilateral femoral hernia, with obstruction, without gangrene, recurrent on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does K41.31 group to?

When unilateral femoral hernia, with obstruction, without gangrene, recurrent is the principal diagnosis on an inpatient stay, it groups to MS-DRG 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.

Is K41.31 a CC or MCC?

CMS lists K41.31 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 18 closely related codes in its exclusion list.

What is the ICD-9 equivalent of K41.31?

Under the General Equivalence Mappings, unilateral femoral hernia, with obstruction, without gangrene, recurrent converts to ICD-9-CM 552.01 (rec unil fem hern w obst). The mapping is a direct match.