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v1.0.0
ICD-10 Guide
DiagnosesArthritis Left Hip

Arthritis Left Hip

ICD-10 Coding for Arthritis of the Left Hip(M16.12, M13.852)

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

Diagnosis Overview

What is Arthritis Left Hip?
Essential facts and insights about Arthritis of the Left Hip

Key Clinical Considerations:

  • Patient presents with joint pain, stiffness, and swelling in the left hip, particularly after periods of inactivity.
  • Laboratory tests may show elevated inflammatory markers such as ESR or CRP, though not always necessary for diagnosis.
  • Physical examination reveals limited range of motion, tenderness over the left hip joint, and possible crepitus during movement.
  • Imaging studies, such as X-rays or MRI, may show joint space narrowing, osteophyte formation, or other degenerative changes.
  • Severity can be assessed using the WOMAC index or similar tools to evaluate pain and functional limitations.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the patient's history of joint symptoms, including duration, severity, and impact on daily activities.
  • Use specific terminology such as 'osteoarthritis' or 'rheumatoid arthritis' as applicable to clarify the type of arthritis.
  • Examples include: 'Patient diagnosed with osteoarthritis of the left hip based on clinical and imaging findings.'
  • Medical necessity must be established, indicating why the diagnosis warrants treatment or further evaluation.
  • Quality measures may include documentation of pain assessments and functional status evaluations.

Coding Guidelines

Usage Guidelines & Examples

  • Use M16.12 for osteoarthritis of the left hip when the condition is confirmed and documented.
  • Do not use this code for arthritis affecting other joints or for unspecified arthritis types.
  • Compare with M16.11 (osteoarthritis, right hip) and M13.852 (other specified arthritis, left hip) for appropriate coding.
  • Common errors include using unspecified codes when a specific diagnosis is available; ensure specificity.
  • In complex cases, consider comorbidities and the primary reason for the visit to guide code selection.

Code Exclusions

Important Exclusions

  • Excludes conditions such as M16.11 (osteoarthritis of the right hip) and M13.9 (unspecified arthritis).
  • Alternative codes for excluded conditions include M17 for knee arthritis or M19 for unspecified arthritis.
  • Conditions are excluded to ensure accurate representation of the patient's specific diagnosis.
  • Avoid common mistakes such as coding for bilateral conditions when only one side is affected.
  • Related but distinct conditions include rheumatoid arthritis and psoriatic arthritis, which require different coding.

Related ICD-10 Codes

Primary Codes
M16.12
Osteoarthritis of the left hip
M13.852
Other specified arthritis, left hip
Ancillary Codes
M25.552
Differential Codes
M13.852
M16.12

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Orthopedics

Specialty Applications

  • Applies to patients with diagnosed osteoarthritis or inflammatory arthritis affecting the left hip.
  • Common in older adults, but can also affect younger individuals with risk factors such as obesity or previous injuries.
  • Relevant in outpatient settings for routine follow-ups or in inpatient settings for surgical interventions.
  • Orthopedic specialty applications include joint injections, physical therapy, and surgical options.
  • Used in treatment contexts involving pain management, rehabilitation, and surgical planning.

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 left hip based on clinical findings of pain and imaging results.'

Template 2

Template: 'Clinical presentation consistent with left hip arthritis including pain and limited range of motion.'

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 left hip arthritis with physical therapy and pain management strategies.'

Template 5

Template: 'Follow-up care for left hip 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 of symptoms, physical exam findings, and imaging results.

How does this differ from similar diagnoses?

Differentiation based on specific joint involvement and type of arthritis.

What are common billing considerations?

Ensure medical necessity is documented to support claims for treatment.

What procedures are typically associated?

Related CPT codes may include joint injections, physical therapy, and surgical interventions.

Are there any quality reporting implications?

Quality measures may include tracking pain levels and functional outcomes in treatment plans.