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ICD-10 Guide
DiagnosesArthritis Of Left Hip

Arthritis Of Left Hip

ICD-10 Coding for Arthritis of Left Hip(M16.12, M16.32)

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

Diagnosis Overview

What is Arthritis Of Left Hip?
Essential facts and insights about Arthritis of 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, but are not definitive 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 subchondral sclerosis.
  • Severity can be assessed using the Kellgren-Lawrence grading scale, which evaluates radiographic features of osteoarthritis.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must include a detailed history of symptoms, duration, and impact on daily activities.
  • Specific terminology such as 'osteoarthritis of left hip' or 'rheumatoid arthritis of left hip' must be used to ensure clarity.
  • Examples include documenting the patient's pain level, functional limitations, and response to previous treatments.
  • Medical necessity must be established through documentation of the patient's symptoms and the need for diagnostic tests or treatments.
  • Quality measures may require documentation of pain assessments and functional status evaluations.

Coding Guidelines

Usage Guidelines & Examples

  • Use M16.12 for unilateral primary osteoarthritis of the left hip when the condition is confirmed and documented.
  • Do not use this code for conditions such as hip fractures or other types of arthritis affecting the left hip.
  • M16.0 (bilateral primary osteoarthritis) and M16.11 (unilateral primary osteoarthritis of the right hip) are related codes.
  • Common errors include using the wrong laterality or failing to specify the type of arthritis; ensure accurate documentation.
  • In complex cases, consider the patient's overall clinical picture and any comorbid conditions that may affect coding.

Code Exclusions

Important Exclusions

  • Excludes conditions such as hip fractures (S72.0) and septic arthritis (M00) which require different coding.
  • Alternative codes for excluded conditions include S72.1 for femoral neck fractures and M00.9 for unspecified septic arthritis.
  • Conditions are excluded to ensure accurate representation of the patient's specific diagnosis and treatment needs.
  • Common mistakes include misclassifying traumatic injuries as arthritis; ensure thorough documentation of the injury mechanism.
  • Related but distinct conditions include bursitis of the hip (M70.61) and tendinitis (M76.1).

Related ICD-10 Codes

Primary Codes
M16.12
Unilateral primary osteoarthritis of the left hip
M16.32
Unilateral secondary osteoarthritis of the left hip
Ancillary Codes
M13.852
Differential Codes
M16.32
M16.12

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Orthopedics

Specialty Applications

  • This diagnosis applies to patients with osteoarthritis or other forms of arthritis affecting the left hip.
  • Patient populations include adults, particularly those over 50 years of age, and individuals with a history of joint injuries.
  • Clinical settings include outpatient orthopedic clinics, rehabilitation facilities, and inpatient settings for severe cases.
  • Specialty-specific applications are relevant in orthopedics, rheumatology, and physical therapy.
  • Treatment contexts include conservative management with physical therapy and medications, as well as 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 arthritis of the left hip based on clinical findings of pain and limited mobility.'

Template 2

Template: 'Clinical presentation consistent with osteoarthritis including joint stiffness and pain after inactivity.'

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 NSAIDs.'

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 examination findings, and imaging results is required.

How does this differ from similar diagnoses?

Key differentiating factors include the type of arthritis (primary vs. secondary) and the presence of specific symptoms.

What are common billing considerations?

Reimbursement factors include the necessity of imaging studies and the documentation of treatment plans.

What procedures are typically associated?

Related CPT codes may include joint injections (20610) and arthroscopy (29862) for treatment.

Are there any quality reporting implications?

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