2027 ICD-10-CM Diagnosis Code K40.30Unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent
ICD-10-CM Codes›K00–K95›K40-K46›K40
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
K40.30 is a billable ICD-10-CM diagnosis code for unilateral inguinal hernia, with obstruction, without 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 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. Coders also document this condition as irreducible inguinal hernia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abdominal hernia and Intestinal obstruction and ileus.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Irreducible inguinal hernia
- Irreducible left inguinal hernia
- Irreducible right inguinal hernia
- Obstructed inguinal hernia
- Obstructed left inguinal hernia
- Obstructed right inguinal hernia
- Strangulated hernia of anterior abdominal wall
- Strangulated inguinal hernia
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K40.30: its own notes plus those printed at K40, 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.
- bubonocele
- direct inguinal hernia
- double inguinal hernia
- indirect inguinal hernia
- inguinal hernia NOS
- oblique inguinal hernia
- scrotal hernia
- 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.
- Inguinal hernia, with obstruction NOS
- Unilateral inguinal hernia, with obstruction, without 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 K40.30, its category, or a range that includes it.
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, Inguinal
an abdominal hernia with an external bulge in the groin region. it can be classified by the location of herniation. indirect inguinal hernias occur through the internal inguinal ring. direct inguinal hernias occur through defects in the abdominal wall (transversalis fascia) in hesselbach's triangle. the former type is commonly seen in children and young adults; the latter in adults.
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 K40.30 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K40.30Overview
Is K40.30 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K40.30 group to?
When unilateral inguinal hernia, with obstruction, without 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 K40.30 a CC or MCC?
CMS lists K40.30 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 K40.30?
Under the General Equivalence Mappings, unilateral inguinal hernia, with obstruction, without gangrene, not specified as recurrent converts to ICD-9-CM 550.10 (unilat ing hernia w obst). The mapping is a direct match.
