S35.31 – Injury of portal vein

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 S35.31

Code: S35.31 (claims format: S3531)
Description: Injury of portal vein
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: S35 › S35.3

Billable codes under S35.31

S35.31 is a header code and cannot be used on claims. Choose the most specific code:

S35.311 – Laceration of portal veinHeader (more codes below)
S35.318 – Other specified injury of portal veinHeader (more codes below)
S35.319 – Unspecified injury of portal veinHeader (more codes below)

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.

S35 – Injury of blood vessels at abdomen, lower back and pelvis level

Code also:

any associated open wound (S31.-)

7th character note:

The appropriate 7th character is to be added to each code from category S35

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)

Related codes in S35.3

Frequently asked questions

What is ICD-10 code S35.31?

S35.31 is the ICD-10-CM code for injury of portal vein, in the block S30-S39 (Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals).

Is S35.31 a billable code?

No. S35.31 is a header code with more specific child codes; report one of the billable codes listed above.

What category does S35.31 belong to?

It belongs to category S35 – Injury of blood vessels at abdomen, lower back and pelvis level.

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.