S31.835

⚠ Non-billable (Header)

Open bite of anus

Injury, poisoning and certain other consequences of external causes (S00-T88)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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Also Known As

Bite of anus NOS

❌ Excludes1

direct

These codes are mutually exclusive. Never code them together.

• superficial bite of anus (S30.877)

❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

S31

• traumatic amputation of part of abdomen, lower back and pelvis (S38.2-, S38.3)

⚠️ Excludes2

inherited

Rules inherited from parent codes.

S31

• open wound of hip (S71.00-S71.02)
• open fracture of pelvis (S32.1--S32.9 with 7th character B)

Child Codes (3)

S31.835AOpen bite of anus, initial encounter✓ Billable S31.835DOpen bite of anus, subsequent encounter✓ Billable S31.835SOpen bite of anus, sequela✓ Billable

Clinical Description

ICD-10-CM code S31.835 represents open bite of anus. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 7-character code at the 6th level of specificity. There are 3 more specific child codes under S31.835. Coders should note that S31.835 has 2 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code S31.835?

ICD-10-CM code S31.835 is "Open bite of anus". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S31.835 a billable ICD-10 code?

No, S31.835 is a non-billable header code. A more specific child code must be used for billing.

What codes are excluded with S31.835?

S31.835 has 2 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can S31.835 be coded with other codes?

S31.835 has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S31.83

Other codes in the same category that may be relevant for differential coding:

S31.831Laceration without foreign body of anus S31.832Laceration with foreign body of anus S31.833Puncture wound without foreign body of anus S31.834Puncture wound with foreign body of anus S31.839Unspecified open wound of anus

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Code Information

CodeS31.835

BillableNo — Header code

ParentS31.83

CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)

Excludes12 rule(s)

Excludes22 note(s)

Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)