2027 ICD-10-CM Diagnosis Code K41.40Unilateral femoral hernia, with gangrene, not specified as recurrent
ICD-10-CM Codes›K00–K95›K40-K46›K41
- Billable — Valid for Submission
- MCC — Major Complication or Comorbidity
- Not Chronic
K41.40 is a billable ICD-10-CM diagnosis code for unilateral femoral hernia, with gangrene, not specified as 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, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 14 closely related codes. Coders also document this condition as femoral hernia with gangrene. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abdominal hernia and Gangrene.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Femoral hernia with gangrene
- Left femoral hernia with gangrene
- Obstructed femoral hernia with gangrene
- Obstructed left femoral hernia
- Obstructed left femoral hernia with gangrene
- Obstructed right femoral hernia
- Obstructed right femoral hernia with gangrene
- Right femoral hernia with gangrene
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K41.40: 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.
- acquired hernia
- congenital [except diaphragmatic or hiatus] hernia
- recurrent hernia
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Femoral hernia, with gangrene NOS
- Unilateral femoral hernia, with gangrene NOS
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.
- 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.
- 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 K41.40, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming K41.40: they are not reported together with it, unless the two conditions are unrelated.
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.
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
Gangrene
Gangrene is the death of tissues in your body. It happens when a part of your body loses its blood supply. Gangrene can happen on the surface of the body, such as on the skin, or inside the body, in muscles or organs. Causes include:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K41.40 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K41.40Overview
What is the ICD-10 code for unilateral femoral hernia, with gangrene, not specified as recurrent?
The ICD-10-CM code for unilateral femoral hernia, with gangrene, not specified as recurrent is K41.40 (sometimes written as K4140). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K41.40 (Unilateral femoral hernia, with gangrene) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unilateral femoral hernia, with gangrene, not specified as recurrent on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K41.40 group to?
When unilateral femoral hernia, with gangrene, not specified as recurrent is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 394, 395, 393, with relative weights from 0.6379 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K41.40 a CC or MCC?
CMS lists K41.40 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 14 closely related codes in its exclusion list.
What is the ICD-9 equivalent of K41.40?
Under the General Equivalence Mappings, unilateral femoral hernia, with gangrene, not specified as recurrent converts to ICD-9-CM 551.00 (unil femoral hern w gang). The mapping is a direct match.
