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S52.266M

✓ Billable

Nondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type I or II 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 S52.266M represents nondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type i or ii 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 S52.266M has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code S52.266M?

ICD-10-CM code S52.266M is "Nondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type I or II with nonunion". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is S52.266M a billable ICD-10 code?

Yes, S52.266M is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

What codes are excluded with S52.266M?

S52.266M has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can S52.266M be coded with other codes?

S52.266M has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in S52.266

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

S52.266ANondisplaced segmental fracture of shaft of ulna, unspecified arm, initial encounter for closed fractureS52.266BNondisplaced segmental fracture of shaft of ulna, unspecified arm, initial encounter for open fracture type I or IIS52.266CNondisplaced segmental fracture of shaft of ulna, unspecified arm, initial encounter for open fracture type IIIA, IIIB, or IIICS52.266DNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for closed fracture with routine healingS52.266ENondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type I or II with routine healingS52.266FNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with routine healingS52.266GNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for closed fracture with delayed healingS52.266HNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type I or II with delayed healingS52.266JNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with delayed healingS52.266KNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for closed fracture with nonunionS52.266NNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for open fracture type IIIA, IIIB, or IIIC with nonunionS52.266PNondisplaced segmental fracture of shaft of ulna, unspecified arm, subsequent encounter for closed fracture with malunion

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Code Information

CodeS52.266M
BillableYes
ParentS52.266
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)