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S42.443A

✓ Billable

Displaced fracture (avulsion) of medial epicondyle of unspecified humerus, initial encounter for closed fracture

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

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❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

S42
  • • traumatic amputation of shoulder and upper arm (S48.-)

⚠️ Excludes2

inherited

Rules inherited from parent codes.

S42.4
  • • fracture of shaft of humerus (S42.3-)
  • • physeal fracture of lower end of humerus (S49.1-)
S42
  • • periprosthetic fracture around internal prosthetic shoulder joint (M97.3)

Clinical Description

ICD-10-CM code S42.443A represents displaced fracture (avulsion) of medial epicondyle of unspecified humerus, initial encounter for closed fracture. This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.

This is a 8-character code at the 7th level of specificity. This is the most specific code available in this subcategory. Coders should note that S42.443A has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code S42.443A?

ICD-10-CM code S42.443A is "Displaced fracture (avulsion) of medial epicondyle of unspecified humerus, initial encounter for closed fracture". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S42.443A a billable ICD-10 code?

Yes, S42.443A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with S42.443A?

S42.443A has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can S42.443A be coded with other codes?

S42.443A has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S42.443

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

S42.443BDisplaced fracture (avulsion) of medial epicondyle of unspecified humerus, initial encounter for open fractureS42.443DDisplaced fracture (avulsion) of medial epicondyle of unspecified humerus, subsequent encounter for fracture with routine healingS42.443GDisplaced fracture (avulsion) of medial epicondyle of unspecified humerus, subsequent encounter for fracture with delayed healingS42.443KDisplaced fracture (avulsion) of medial epicondyle of unspecified humerus, subsequent encounter for fracture with nonunionS42.443PDisplaced fracture (avulsion) of medial epicondyle of unspecified humerus, subsequent encounter for fracture with malunionS42.443SDisplaced fracture (avulsion) of medial epicondyle of unspecified humerus, sequela

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Code Information

CodeS42.443A
BillableYes
ParentS42.443
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes11 rule(s)
Excludes23 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)