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ICD-10 Guide
ICD-10 CodesJ45.4

J45.4

Moderate persistent asthma

BILLABLE STATUSNo
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/06/2025

Code Description

ICD-10 J45.4 is a used to indicate a diagnosis of moderate persistent asthma.

Key Diagnostic Point:

Moderate persistent asthma is characterized by daily symptoms that require the use of a rescue inhaler on a daily basis and may interfere with normal activities. Patients typically experience nighttime symptoms more than once a week but not nightly. The condition involves inflammation and narrowing of the airways, leading to difficulty in breathing, wheezing, chest tightness, and coughing. The anatomy involved includes the bronchi and bronchioles, which are the air passages in the lungs. Disease progression can vary; while some patients may experience stable periods, others may have exacerbations that require increased medication or hospitalization. Diagnostic considerations include a thorough patient history, physical examination, and spirometry tests to assess lung function. The presence of triggers such as allergens, irritants, and respiratory infections should also be evaluated to manage the condition effectively.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Diagnostic complexity: Requires comprehensive evaluation of symptoms and triggers.
  • Treatment complexity: Involves a combination of long-term control medications and quick-relief inhalers.
  • Documentation requirements: Detailed records of symptoms, medication use, and response to treatment are necessary.
  • Coding specificity: Requires accurate coding to differentiate from other asthma types.

Audit Risk Factors

  • Common coding errors: Misclassification of asthma severity.
  • Documentation gaps: Incomplete records of exacerbations or medication adherence.
  • Billing challenges: Potential denials due to lack of supporting documentation for the severity of the condition.

Specialty Focus

Medical Specialties

Pulmonology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Allergy and Immunology

Documentation Requirements

Standard ICD-10-CM documentation requirements apply

Common Clinical Scenarios

Various clinical presentations within this specialty area

Billing Considerations

Follow specialty-specific billing guidelines

Related CPT Codes

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

CPT Code

Clinical Scenario

Documentation Requirements

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

Moderate persistent asthma significantly impacts patient quality of life and healthcare utilization, leading to increased emergency room visits and hospitalizations. It affects a substantial portion of the population, particularly children and young adults. Quality measures focus on medication adherence and control of symptoms to reduce exacerbations. Understanding the epidemiology of asthma helps in developing targeted interventions to improve patient outcomes and reduce healthcare costs.

ICD-9 vs ICD-10

Moderate persistent asthma significantly impacts patient quality of life and healthcare utilization, leading to increased emergency room visits and hospitalizations. It affects a substantial portion of the population, particularly children and young adults. Quality measures focus on medication adherence and control of symptoms to reduce exacerbations. Understanding the epidemiology of asthma helps in developing targeted interventions to improve patient outcomes and reduce healthcare costs.

Reimbursement & Billing Impact

Reimbursement considerations include ensuring that the documentation supports the level of service billed. Common denials may arise from insufficient documentation of the patient's condition or failure to demonstrate medical necessity for the prescribed treatments. Best practices include regular updates to the patient's treatment plan and clear communication of any changes in symptoms or medication adherence.

Resources

Clinical References

  • •
    ICD-10 Official Guidelines for J00-J99
  • •
    Clinical Documentation Requirements

Coding & Billing References

  • •
    ICD-10 Official Guidelines for J00-J99
  • •
    Clinical Documentation Requirements

Frequently Asked Questions

What specific conditions are covered by J45.4?

J45.4 covers moderate persistent asthma, which includes patients experiencing daily symptoms that require medication for control and may have nighttime symptoms more than once a week. It does not include severe asthma or mild persistent asthma, which are classified under different codes.

When should J45.4 be used instead of related codes?

J45.4 should be used when a patient exhibits moderate persistent asthma symptoms, characterized by daily use of rescue inhalers and frequent nighttime symptoms. It is important to differentiate it from mild persistent asthma (J45.2) and severe asthma (J45.5) based on the frequency and severity of symptoms.

What documentation supports J45.4?

Documentation for J45.4 should include a detailed history of asthma symptoms, frequency of exacerbations, medication usage, and results from lung function tests such as spirometry. Additionally, any identified triggers and the patient's response to treatment should be documented.