K42 – Umbilical hernia

ICD-10-CM 2027 diagnosis code · Hernia

Non-billable header

ICD-10-CM code K42
Code
K42 (claims format: K42)
Description
Umbilical hernia
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
11. Diseases of the digestive system (K00-K95)
Block
K40-K46 Hernia

Billable codes under K42

K42 is a header code and cannot be used on claims. Choose the most specific code:

Notes for K42

Includes:
  • paraumbilical hernia
Excludes1 (not coded here):

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block K40-K46

Includes:
  • acquired hernia
  • congenital [except diaphragmatic or hiatus] hernia
  • recurrent hernia
Notes:
  • Hernia with both gangrene and obstruction is classified to hernia with gangrene.

Frequently asked questions

What is ICD-10 code K42?

K42 is the ICD-10-CM code for umbilical hernia, in the block K40-K46 (Hernia).

Is K42 a billable code?

No. K42 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.