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S52.279N

✓ Billable

Monteggia's fracture of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion

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.

S52
  • • traumatic amputation of forearm (S58.-)

⚠️ Excludes2

inherited

Rules inherited from parent codes.

S52
  • • fracture at wrist and hand level (S62.-)
  • • periprosthetic fracture around internal prosthetic elbow joint (M97.4)

Clinical Description

ICD-10-CM code S52.279N represents monteggia's fracture of unspecified ulna, subsequent encounter for open fracture type iiia, iiib, or iiic with nonunion. 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 S52.279N has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code S52.279N?

ICD-10-CM code S52.279N is "Monteggia's fracture of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunion". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S52.279N a billable ICD-10 code?

Yes, S52.279N is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with S52.279N?

S52.279N has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can S52.279N be coded with other codes?

S52.279N has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S52.279

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

S52.279AMonteggia's fracture of unspecified ulna, initial encounter for closed fractureS52.279BMonteggia's fracture of unspecified ulna, initial encounter for open fracture type I or IIS52.279CMonteggia's fracture of unspecified ulna, initial encounter for open fracture type IIIA, IIIB, or IIICS52.279DMonteggia's fracture of unspecified ulna, subsequent encounter for closed fracture with routine healingS52.279EMonteggia's fracture of unspecified ulna, subsequent encounter for open fracture type I or II with routine healingS52.279FMonteggia's fracture of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healingS52.279GMonteggia's fracture of unspecified ulna, subsequent encounter for closed fracture with delayed healingS52.279HMonteggia's fracture of unspecified ulna, subsequent encounter for open fracture type I or II with delayed healingS52.279JMonteggia's fracture of unspecified ulna, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healingS52.279KMonteggia's fracture of unspecified ulna, subsequent encounter for closed fracture with nonunionS52.279MMonteggia's fracture of unspecified ulna, subsequent encounter for open fracture type I or II with nonunionS52.279PMonteggia's fracture of unspecified ulna, subsequent encounter for closed fracture with malunion

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Code Information

CodeS52.279N
BillableYes
ParentS52.279
CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)
Excludes11 rule(s)
Excludes22 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)