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v1.0.0
ICD-10 Guide
ICD-10 CodesR29.2

R29.2

Abnormal reflex

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

Code Description

ICD-10 R29.2 is a billable code used to indicate a diagnosis of abnormal reflex.

Key Diagnostic Point:

Abnormal reflexes are clinical signs that indicate dysfunction in the nervous system, often resulting from neurological disorders. These reflexes can be exaggerated (hyperreflexia), diminished (hyporeflexia), or absent (areflexia). Abnormal reflexes may arise from various conditions affecting the central or peripheral nervous system, including spinal cord injuries, multiple sclerosis, neuropathies, or metabolic disorders. Clinically, abnormal reflexes can be assessed through physical examination techniques such as deep tendon reflex testing, which evaluates the integrity of the reflex arc. The presence of abnormal reflexes can provide critical insights into the underlying pathology, guiding further diagnostic workup and management. It is essential for healthcare providers to document the specific reflexes tested, the findings, and any associated symptoms to ensure accurate coding and appropriate treatment planning.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying conditions that can cause abnormal reflexes
  • Need for detailed documentation of reflex testing and findings
  • Differentiation between types of reflex abnormalities
  • Potential overlap with other neurological codes

Audit Risk Factors

  • Inadequate documentation of reflex testing
  • Failure to specify the type of abnormal reflex
  • Misclassification of reflex abnormalities under other codes
  • Lack of correlation between clinical findings and diagnosis

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed documentation of neurological examination findings, including specific reflexes tested and their results.

Common Clinical Scenarios

Patients presenting with unexplained weakness, sensory changes, or coordination issues.

Billing Considerations

Consider the patient's overall clinical picture and any comorbidities that may affect reflexes.

Emergency Medicine

Documentation Requirements

Acute care documentation must include a rapid neurological assessment and any immediate interventions.

Common Clinical Scenarios

Patients with acute neurological deficits, such as stroke or head trauma.

Billing Considerations

Timely documentation is crucial for acute care settings, and reflex findings should be correlated with other neurological signs.

Coding Guidelines

Inclusion Criteria

Use R29.2 When
  • Follow official ICD
  • CM coding guidelines, ensuring that the code is used only when abnormal reflexes are documented and clinically relevant
  • The code should not be used as a primary diagnosis unless it is the main reason for the encounter

Exclusion Criteria

Do NOT use R29.2 When
No specific exclusions found.

Related CPT Codes

959.01CPT Code

Nerve conduction studies

Clinical Scenario

Used to evaluate nerve function in patients with abnormal reflexes.

Documentation Requirements

Document the specific nerves tested and the findings.

Specialty Considerations

Neurology specialists often perform these studies.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of neurological symptoms, including abnormal reflexes, improving the granularity of data for clinical research and quality reporting.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of neurological symptoms, including abnormal reflexes, improving the granularity of data for clinical research and quality reporting.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of neurological symptoms, including abnormal reflexes, improving the granularity of data for clinical research and quality reporting.

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

What are the common causes of abnormal reflexes?

Common causes include neurological disorders such as multiple sclerosis, spinal cord injuries, peripheral neuropathies, and metabolic conditions like diabetes.

How should abnormal reflexes be documented?

Documentation should include the specific reflexes tested, the results, and any associated clinical findings or symptoms.