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v1.0.0
ICD-10 Guide
ICD-10 CodesS42.21

S42.21

Billable

Unspecified fracture of surgical neck of humerus

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/24/2025

Code Description

ICD-10 S42.21 is a billable code used to indicate a diagnosis of unspecified fracture of surgical neck of humerus.

Key Diagnostic Point:

The surgical neck of the humerus is a common site for fractures, particularly in older adults and those with osteoporosis. An unspecified fracture at this location indicates a break in the bone that does not have a specific classification, which can complicate treatment and recovery. These fractures often result from falls or direct trauma to the shoulder. Symptoms typically include pain, swelling, and limited range of motion in the shoulder. Diagnosis is usually confirmed through imaging studies such as X-rays or CT scans. Treatment may involve conservative management with immobilization and physical therapy, or surgical intervention if the fracture is displaced or unstable. Surgical options may include internal fixation or shoulder arthroplasty, depending on the severity of the fracture and the patient's overall health. Rehabilitation is crucial for restoring function and strength to the shoulder joint post-injury.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in fracture types and treatment options
  • Need for precise documentation of injury mechanism
  • Potential for associated soft tissue injuries
  • Differentiation from other shoulder injuries

Audit Risk Factors

  • Inadequate documentation of fracture specifics
  • Failure to document associated injuries
  • Misclassification of fracture type
  • Inconsistent coding of follow-up care

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed operative reports, imaging studies, and post-operative notes are essential.

Common Clinical Scenarios

Fractures due to falls in elderly patients, sports injuries in younger patients, and post-surgical complications.

Billing Considerations

Ensure accurate documentation of fracture type and treatment approach to avoid coding errors.

Physical Therapy

Documentation Requirements

Progress notes detailing rehabilitation protocols and patient responses.

Common Clinical Scenarios

Rehabilitation following surgical repair of humeral fractures.

Billing Considerations

Documenting functional limitations and progress is crucial for accurate coding.

Coding Guidelines

Inclusion Criteria

Use S42.21 When
  • Follow official ICD
  • 10 coding guidelines, ensuring that the code is used only when the fracture is unspecified
  • Include additional codes for any associated injuries or conditions

Exclusion Criteria

Do NOT use S42.21 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

23470CPT Code

Arthroscopy, shoulder, surgical

Clinical Scenario

Used in cases where surgical intervention is required for fracture repair.

Documentation Requirements

Operative report detailing the procedure and findings.

Specialty Considerations

Orthopedic surgeons must document the necessity for surgery.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of fractures, improving the accuracy of patient records and treatment plans. S42.21 serves as a catch-all for unspecified fractures, which can lead to challenges in treatment planning and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of fractures, improving the accuracy of patient records and treatment plans. S42.21 serves as a catch-all for unspecified fractures, which can lead to challenges in treatment planning and reimbursement.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

When should I use S42.21?

Use S42.21 when a patient has an unspecified fracture of the surgical neck of the humerus, and no further details are available regarding the fracture type or treatment.