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v1.0.0
ICD-10 Guide
ICD-10 CodesR46.4

R46.4

Slowness and poor responsiveness

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 R46.4 is a billable code used to indicate a diagnosis of slowness and poor responsiveness.

Key Diagnostic Point:

Slowness and poor responsiveness (ICD-10 code R46.4) refers to a clinical presentation characterized by a noticeable decrease in the speed of response to stimuli, both verbal and physical. This condition may manifest as lethargy, delayed reactions, or an overall lack of engagement with the environment. It can be indicative of various underlying medical issues, including neurological disorders, metabolic imbalances, or psychiatric conditions. Common causes include infections (such as meningitis), metabolic disturbances (like hypoglycemia), and neurological conditions (such as stroke or dementia). The assessment of slowness and poor responsiveness often involves a thorough clinical evaluation, including a detailed history, physical examination, and potentially neuroimaging or laboratory tests to identify the underlying cause. It is crucial to differentiate this symptom from other conditions that may present similarly, as the management and implications can vary significantly based on the underlying etiology.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying causes that can present with similar symptoms
  • Need for comprehensive clinical documentation to support diagnosis
  • Potential overlap with other ICD-10 codes for similar symptoms
  • Variability in clinical presentation based on patient demographics

Audit Risk Factors

  • Inadequate documentation of the clinical rationale for the diagnosis
  • Failure to specify the underlying cause if known
  • Misuse of the code in cases where a more specific diagnosis exists
  • Lack of follow-up documentation to support ongoing symptoms

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed patient history, physical examination findings, and any relevant lab results must be documented to support the diagnosis of slowness and poor responsiveness.

Common Clinical Scenarios

Patients presenting with fatigue, confusion, or altered mental status in a primary care setting.

Billing Considerations

Consideration of chronic conditions that may contribute to symptoms, such as diabetes or thyroid disorders.

Emergency Medicine

Documentation Requirements

Acute care documentation must include vital signs, neurological assessments, and any immediate interventions performed.

Common Clinical Scenarios

Patients presenting with altered mental status or lethargy following trauma or acute illness.

Billing Considerations

Rapid assessment and documentation are critical to rule out life-threatening conditions.

Coding Guidelines

Inclusion Criteria

Use R46.4 When
  • According to ICD
  • 10 coding guidelines, R46
  • 4 should be used when slowness and poor responsiveness are the primary symptoms and not attributable to a more specific diagnosis
  • Coders should ensure that the documentation supports the use of this code

Exclusion Criteria

Do NOT use R46.4 When
No specific exclusions found.

Related CPT Codes

99213CPT Code

Established patient office visit, Level 3

Clinical Scenario

Used when a patient presents with slowness and poor responsiveness for evaluation.

Documentation Requirements

Document the history, examination, and medical decision-making.

Specialty Considerations

Internal medicine may require more detailed documentation of chronic conditions.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of symptoms like slowness and poor responsiveness, enabling better tracking of patient outcomes and resource utilization. It emphasizes the need for detailed documentation to support the diagnosis.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of symptoms like slowness and poor responsiveness, enabling better tracking of patient outcomes and resource utilization. It emphasizes the need for detailed documentation to support the diagnosis.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of symptoms like slowness and poor responsiveness, enabling better tracking of patient outcomes and resource utilization. It emphasizes the need for detailed documentation to support the diagnosis.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

When should I use R46.4?

Use R46.4 when a patient presents with slowness and poor responsiveness that cannot be attributed to a more specific diagnosis. Ensure that the clinical documentation supports this coding.