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S42.302A

✓ Billable

Unspecified fracture of shaft of humerus, left arm, 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.

S42.3
  • • physeal fractures of upper end of humerus (S49.0-)
  • • physeal fractures of lower end of humerus (S49.1-)
S42
  • • periprosthetic fracture around internal prosthetic shoulder joint (M97.3)

Clinical Description

ICD-10-CM code S42.302A represents unspecified fracture of shaft of humerus, left arm, 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 S42.302A has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code S42.302A?

ICD-10-CM code S42.302A is "Unspecified fracture of shaft of humerus, left arm, initial encounter for closed fracture". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S42.302A a billable ICD-10 code?

Yes, S42.302A is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with S42.302A?

S42.302A has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can S42.302A be coded with other codes?

S42.302A has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S42.302

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

S42.302BUnspecified fracture of shaft of humerus, left arm, initial encounter for open fractureS42.302DUnspecified fracture of shaft of humerus, left arm, subsequent encounter for fracture with routine healingS42.302GUnspecified fracture of shaft of humerus, left arm, subsequent encounter for fracture with delayed healingS42.302KUnspecified fracture of shaft of humerus, left arm, subsequent encounter for fracture with nonunionS42.302PUnspecified fracture of shaft of humerus, left arm, subsequent encounter for fracture with malunionS42.302SUnspecified fracture of shaft of humerus, left arm, sequela

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Code Information

CodeS42.302A
BillableYes
ParentS42.302
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)