S36.81 – Injury of peritoneum

ICD-10-CM 2027 diagnosis code · Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals

Non-billable header

ICD-10-CM code S36.81

Code: S36.81 (claims format: S3681)
Description: Injury of peritoneum
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: S30-S39 Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
Parent codes: S36 › S36.8

Billable codes under S36.81

S36.81 is a header code and cannot be used on claims. Choose the most specific code:

S36.81XA – Injury of peritoneum, initial encounterBillable
S36.81XD – Injury of peritoneum, subsequent encounterBillable
S36.81XS – Injury of peritoneum, sequelaBillable

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

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

S36 – Injury of intra-abdominal organs

Code also:

any associated open wound (S31.-)

7th character note:

The appropriate 7th character is to be added to each code from category S36

Block S30-S39

Includes:

injuries to the abdominal wall
injuries to the anus
injuries to the buttock
injuries to the external genitalia
injuries to the flank
injuries to the groin

Excludes2 (not included here):

burns and corrosions (T20-T32)
effects of foreign body in anus and rectum (T18.5)
effects of foreign body in genitourinary tract (T19.-)
effects of foreign body in stomach, small intestine and colon (T18.2-T18.4)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)

Index terms for S36.81

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in S36.8

S36.89 – Injury of other intra-abdominal organsHeader

Frequently asked questions

What is ICD-10 code S36.81?

S36.81 is the ICD-10-CM code for injury of peritoneum, in the block S30-S39 (Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals).

Is S36.81 a billable code?

No. S36.81 is a header code with more specific child codes; report one of the billable codes listed above.

What category does S36.81 belong to?

It belongs to category S36 – Injury of intra-abdominal organs.

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.