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ICD-10 Guide
DiagnosesAnkle Fracture

Ankle Fracture

ICD-10 Coding for Ankle Fracture(S82.64XA, M84.572A)

PRIMARY SPECIALTYOrthopedics
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Ankle Fracture?
Essential facts and insights about Ankle Fracture

Key Clinical Considerations:

  • Pain and swelling around the ankle joint, often with difficulty bearing weight.
  • Imaging findings such as X-rays showing a fracture line in the distal fibula or tibia.
  • Physical examination may reveal tenderness, deformity, and instability of the ankle.
  • CT or MRI may be used for complex fractures or to assess soft tissue involvement.
  • Severity can be classified based on the type of fracture (e.g., stable vs. unstable) and presence of associated injuries.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Complete medical history including mechanism of injury and prior ankle issues.
  • Specific terminology such as 'lateral malleolus fracture' or 'bimalleolar fracture' must be documented.
  • Examples include: 'Patient presents with a right ankle fracture following a fall.'
  • Documentation must support medical necessity for imaging and treatment interventions.
  • Quality measures may include documentation of pain assessment and functional status.

Coding Guidelines

Usage Guidelines & Examples

  • Use S82.64XA for initial encounter of a fracture of the lateral malleolus; M84.572A for stress fractures.
  • Do not use S82.64XA for fractures of the foot or other unrelated injuries.
  • Compare with S82.63XA for fractures of the medial malleolus; both codes indicate ankle fractures but differ in location.
  • Common errors include using the wrong laterality or encounter type; ensure accurate documentation.
  • In complex cases, consider additional codes for associated injuries or complications.

Code Exclusions

Important Exclusions

  • Excludes fractures of the foot (ICD-10 codes S92) and fractures of the leg (ICD-10 codes S82.0-S82.3).
  • Alternative codes for excluded conditions include S92.0 for fractures of the toes.
  • Conditions are excluded due to anatomical differences and treatment protocols.
  • Common mistakes include misclassifying foot fractures as ankle fractures; verify the site of injury.
  • Related but distinct conditions include ankle sprains and ligamentous injuries.

Related ICD-10 Codes

Primary Codes
S82.64XA
Fracture of the lateral malleolus, right ankle, initial encounter
M84.572A
Stress fracture of the ankle, right, initial encounter
Ancillary Codes
Z79.899
C78.00
Differential Codes
M84.572A
S82.64XA

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Orthopedics

Specialty Applications

  • Applies to acute traumatic fractures, stress fractures, and post-surgical complications.
  • Patient populations include all ages, with higher incidence in athletes and elderly individuals.
  • Clinical settings include emergency departments, outpatient orthopedic clinics, and inpatient surgical units.
  • Specialty-specific applications are relevant in orthopedics and sports medicine.
  • Treatment contexts include conservative management, surgical intervention, and rehabilitation.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with ankle fracture based on X-ray findings showing a fracture of the lateral malleolus.'

Template 2

Template: 'Clinical presentation consistent with ankle fracture including severe pain and swelling.'

Template 3

Template: 'Diagnostic criteria met as evidenced by X-ray showing a fracture line in the distal fibula.'

Template 4

Template: 'Treatment plan initiated for ankle fracture with immobilization and referral to orthopedic specialist.'

Template 5

Template: 'Follow-up care for ankle fracture including monitoring for signs of complications.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Detailed documentation should include mechanism of injury, physical exam findings, and imaging results.

How does this differ from similar diagnoses?

Ankle fractures differ from sprains in that fractures involve a break in the bone, while sprains involve ligament damage.

What are common billing considerations?

Ensure that the diagnosis code matches the procedure performed and that medical necessity is clearly documented.

What procedures are typically associated?

Common CPT codes include 27814 for open treatment of ankle fractures and 29505 for application of a cast.

Are there any quality reporting implications?

Quality measures may include tracking functional outcomes and adherence to treatment protocols.