ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
DiagnosesArthritis Right Ankle

Arthritis Right Ankle

ICD-10 Coding for Arthritis of the Right Ankle(M19.071, M19.171, M06.871)

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

Diagnosis Overview

What is Arthritis Right Ankle?
Essential facts and insights about Arthritis of the Right Ankle

Key Clinical Considerations:

  • Presence of joint pain, swelling, and stiffness in the right ankle, particularly after periods of inactivity or overuse.
  • Laboratory findings may include elevated inflammatory markers such as ESR or CRP, and specific autoantibodies if autoimmune arthritis is suspected.
  • Physical examination findings may reveal tenderness, warmth, and reduced range of motion in the right ankle joint.
  • Imaging studies such as X-rays may show joint space narrowing, osteophyte formation, or subchondral sclerosis indicative of osteoarthritis.
  • Severity criteria may include the degree of functional impairment and pain levels assessed using standardized scales.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the patient's history of joint symptoms, duration, and any previous treatments.
  • Specific terminology such as 'osteoarthritis', 'rheumatoid arthritis', or 'post-traumatic arthritis' must be used accurately.
  • Documentation examples include noting the specific joint affected, the severity of symptoms, and response to treatment.
  • Medical necessity must be established through documentation of the impact of arthritis on daily activities and quality of life.
  • Quality measures may require documentation of pain assessments and functional status evaluations.

Coding Guidelines

Usage Guidelines & Examples

  • Use M19.071 for primary osteoarthritis of the right ankle; use M19.171 for secondary osteoarthritis due to previous injury.
  • Do not use these codes for inflammatory arthritis types such as rheumatoid arthritis, which have different coding.
  • Similar codes include M06.871 for other specified arthritis, which may apply in cases of undifferentiated arthritis.
  • Common coding errors include misclassifying the type of arthritis or failing to specify laterality; ensure accurate documentation.
  • In complex cases, consider the patient's full clinical picture, including comorbidities and previous diagnoses, for appropriate code selection.

Code Exclusions

Important Exclusions

  • Excludes conditions such as gout (M10) and rheumatoid arthritis (M05-M06) that have distinct coding.
  • Alternative codes for excluded conditions include M10 for gout and M05 for rheumatoid arthritis.
  • Conditions are excluded due to differing pathophysiology and treatment approaches.
  • Common exclusion mistakes include misdiagnosing gout as osteoarthritis; ensure accurate lab results are reviewed.
  • Related but distinct conditions include psoriatic arthritis and septic arthritis, which require different codes.

Related ICD-10 Codes

Primary Codes
M19.071
Primary billable ICD-10 code for primary osteoarthritis of the right ankle
M19.171
Related code for secondary osteoarthritis of the right ankle
Ancillary Codes
M25.571
R26.89
Z79.5
Differential Codes
M19.171
M19.071

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Rheumatology

Specialty Applications

  • Applies to patients with diagnosed osteoarthritis or other forms of arthritis affecting the right ankle.
  • Patient populations include adults, particularly those over 50, and individuals with a history of joint injuries.
  • Clinical settings include outpatient rheumatology clinics, physical therapy, and inpatient rehabilitation.
  • Specialty-specific applications are relevant in rheumatology, orthopedics, and pain management.
  • Treatment contexts include conservative management, physical therapy, and potential surgical interventions.

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 osteoarthritis of the right ankle based on clinical findings of pain and swelling.'

Template 2

Template: 'Clinical presentation consistent with arthritis including joint stiffness and reduced mobility.'

Template 3

Template: 'Diagnostic criteria for osteoarthritis met as evidenced by X-ray findings of joint space narrowing.'

Template 4

Template: 'Treatment plan initiated for right ankle arthritis with physical therapy and NSAIDs.'

Template 5

Template: 'Follow-up care for right ankle arthritis including monitoring of pain levels and functional status.'

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 patient history, physical exam findings, and any imaging results.

How does this differ from similar diagnoses?

Key differentiating factors include the presence of specific symptoms, lab results, and imaging findings.

What are common billing considerations?

Reimbursement factors include demonstrating medical necessity and providing comprehensive documentation.

What procedures are typically associated?

Related CPT codes may include joint injections, physical therapy, and imaging studies.

Are there any quality reporting implications?

Quality measures may include tracking pain levels and functional status in patients with arthritis.