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ICD-10 Guide
ICD-10 CodesM84.331

M84.331

Billable

Stress fracture, right ulna

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/17/2025

Code Description

ICD-10 M84.331 is a billable code used to indicate a diagnosis of stress fracture, right ulna.

Key Diagnostic Point:

A stress fracture of the ulna is a small crack in the bone that occurs due to repetitive force or overuse, rather than a single traumatic event. The ulna, one of the two long bones in the forearm, can be susceptible to stress fractures, particularly in athletes or individuals with certain bone density disorders. Factors such as osteoporosis, which leads to decreased bone density and strength, can increase the risk of stress fractures. Symptoms typically include localized pain, swelling, and tenderness along the ulna, which may worsen with activity and improve with rest. Diagnosis is often confirmed through imaging studies such as X-rays or MRI, which can reveal the fracture and assess the surrounding bone density. Treatment usually involves rest, immobilization, and possibly physical therapy to strengthen the surrounding muscles and prevent future injuries. Understanding the underlying bone metabolism and density disorders is crucial for managing and preventing stress fractures effectively.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between stress fractures and other types of fractures
  • Understanding the impact of underlying bone density disorders like osteoporosis
  • Need for precise documentation of the location and nature of the fracture
  • Potential for co-existing conditions that may complicate coding

Audit Risk Factors

  • Inadequate documentation of the fracture type and location
  • Failure to document underlying conditions such as osteoporosis
  • Misclassification of the fracture as acute rather than stress-related
  • Inconsistent coding practices across different providers

Specialty Focus

Medical Specialties

Orthopedics

Documentation Requirements

Detailed imaging reports, treatment plans, and follow-up notes are essential.

Common Clinical Scenarios

Athletes presenting with forearm pain, patients with osteoporosis experiencing fractures.

Billing Considerations

Documentation must clearly differentiate between stress fractures and other fracture types.

Endocrinology

Documentation Requirements

Bone density test results and management plans for osteoporosis must be included.

Common Clinical Scenarios

Patients with osteoporosis presenting with fractures or bone pain.

Billing Considerations

Understanding the patient's overall bone health is critical for accurate coding.

Coding Guidelines

Inclusion Criteria

Use M84.331 When
  • According to ICD
  • 10 guidelines, M84
  • 331 should be used when a stress fracture of the right ulna is confirmed
  • It is important to document the cause of the fracture and any underlying conditions that may contribute to bone weakness

Exclusion Criteria

Do NOT use M84.331 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

20610CPT Code

Arthrocentesis, aspiration and/or injection into a major joint or bursa

Clinical Scenario

Used when a patient with a stress fracture requires joint aspiration for pain relief.

Documentation Requirements

Document the reason for the procedure and the joint involved.

Specialty Considerations

Orthopedic specialists may frequently perform this procedure in conjunction with stress fracture management.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of stress fractures, improving the ability to track and manage these injuries. The granularity of ICD-10 codes helps in understanding the prevalence of stress fractures in various populations, particularly those with bone density disorders.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of stress fractures, improving the ability to track and manage these injuries. The granularity of ICD-10 codes helps in understanding the prevalence of stress fractures in various populations, particularly those with bone density disorders.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of stress fractures, improving the ability to track and manage these injuries. The granularity of ICD-10 codes helps in understanding the prevalence of stress fractures in various populations, particularly those with bone density disorders.

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

What is the difference between a stress fracture and a regular fracture?

A stress fracture is a small crack in the bone caused by repetitive force or overuse, while a regular fracture typically results from a single traumatic event. Stress fractures often develop gradually and may not be visible on initial X-rays.