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
DiagnosesAntinuclear Antibody

Antinuclear Antibody

ICD-10 Coding for Antinuclear Antibody(R76.0, R76.8)

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

Diagnosis Overview

What is Antinuclear Antibody?
Essential facts and insights about Antinuclear Antibody

Key Clinical Considerations:

  • Presence of autoimmune symptoms such as fatigue, joint pain, and skin rashes.
  • Positive antinuclear antibody (ANA) test results, typically measured in titers.
  • Physical examination may reveal signs of systemic lupus erythematosus (SLE) or other autoimmune disorders.
  • Imaging may show joint inflammation or damage in cases of associated rheumatologic conditions.
  • Severity criteria may include the extent of organ involvement in systemic diseases.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Complete medical history including symptoms, duration, and impact on daily activities.
  • Specific terminology such as 'positive ANA' or 'antinuclear antibody positivity' must be documented.
  • Examples include documenting the titer level and any associated symptoms or findings.
  • Medical necessity must be established through documentation of symptoms and clinical rationale for testing.
  • Quality measures may include tracking ANA test results and associated diagnoses in patient care.

Coding Guidelines

Usage Guidelines & Examples

  • Use R76.0 for a positive ANA test without a definitive diagnosis of an autoimmune disease.
  • Do not use this code if the positive ANA is incidental and not related to any clinical symptoms.
  • Compare with codes for specific autoimmune diseases like M32 for systemic lupus erythematosus.
  • Common errors include using R76.0 when a specific autoimmune condition is diagnosed.
  • In complex cases, ensure to document all relevant clinical findings to support code selection.

Code Exclusions

Important Exclusions

  • Conditions such as infections or malignancies that may cause a positive ANA but are not autoimmune.
  • Alternative codes for excluded conditions include those for specific infections or cancers.
  • Exclusions are based on the understanding that a positive ANA alone does not confirm an autoimmune disease.
  • Common mistakes include coding R76.0 for patients with known malignancies without autoimmune symptoms.
  • Related but distinct conditions include drug-induced lupus and other secondary causes of positive ANA.

Related ICD-10 Codes

Primary Codes
R76.0
Positive antinuclear antibody test
R76.8
Other abnormal immunological findings
Ancillary Codes
M32.9
M35.00
Differential Codes
R76.8
R76.8
when specific ANA patterns are documented.
R76.0
R76.0
for elevated titer without pattern.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Rheumatology

Specialty Applications

  • Applies to conditions such as systemic lupus erythematosus, rheumatoid arthritis, and scleroderma.
  • Patient populations include adults, particularly women aged 20-50, who are at higher risk.
  • Clinical settings include outpatient rheumatology clinics and inpatient care for severe cases.
  • Specialty-specific applications are primarily in rheumatology and immunology.
  • Treatment contexts include management of autoimmune diseases where ANA testing is relevant.

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 positive ANA based on clinical findings of fatigue and joint pain.'

Template 2

Template: 'Clinical presentation consistent with autoimmune disorder including joint swelling and rash.'

Template 3

Template: 'Diagnostic criteria for lupus met as evidenced by positive ANA and clinical symptoms.'

Template 4

Template: 'Treatment plan initiated for suspected lupus with corticosteroids and follow-up scheduled.'

Template 5

Template: 'Follow-up care for positive ANA including monitoring for symptoms of autoimmune disease.'

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?

Documentation must include clinical findings, test results, and symptom descriptions.

How does this differ from similar diagnoses?

Differentiation is based on specific symptoms and the presence of other diagnostic criteria.

What are common billing considerations?

Ensure that the medical necessity is clearly documented to support reimbursement.

What procedures are typically associated?

CPT codes for related procedures may include 86038 for ANA testing.

Are there any quality reporting implications?

Quality measures may involve tracking ANA results and their clinical implications in patient care.