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v1.0.0
ICD-10 Guide
ICD-10 CodesR29.703

R29.703

NIHSS score 3

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

Code Description

ICD-10 R29.703 is a billable code used to indicate a diagnosis of nihss score 3.

Key Diagnostic Point:

The NIHSS (National Institutes of Health Stroke Scale) score of 3 indicates a mild stroke, characterized by specific neurological deficits. Patients with this score may exhibit symptoms such as slight weakness in one arm or leg, minor speech difficulties, or slight visual field deficits. The NIHSS is a standardized tool used to assess the severity of stroke symptoms and guide treatment decisions. A score of 3 suggests that the patient has some neurological impairment but is not severely affected. Common causes of such mild strokes include transient ischemic attacks (TIAs), small vessel disease, or embolic strokes. The clinical context for this score often involves rapid assessment in emergency settings, where timely intervention can significantly impact patient outcomes. Accurate documentation of the patient's neurological status, including specific deficits observed during the assessment, is crucial for coding and treatment planning.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in symptom presentation among patients
  • Need for precise documentation of neurological deficits
  • Differentiation from other stroke severity scores
  • Potential overlap with other neurological conditions

Audit Risk Factors

  • Inadequate documentation of neurological assessments
  • Misinterpretation of NIHSS scores
  • Failure to correlate clinical findings with imaging results
  • Inconsistent coding practices across providers

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Documentation must include a detailed neurological examination, including specific deficits and their impact on daily functioning.

Common Clinical Scenarios

Patients presenting with mild stroke symptoms in outpatient settings or follow-up visits.

Billing Considerations

Consideration of comorbidities that may affect stroke presentation and recovery.

Emergency Medicine

Documentation Requirements

Acute care documentation must capture the NIHSS score, time of onset, and any interventions performed.

Common Clinical Scenarios

Patients presenting to the emergency department with acute stroke symptoms.

Billing Considerations

Rapid assessment and documentation are critical for treatment decisions and coding accuracy.

Coding Guidelines

Inclusion Criteria

Use R29.703 When
  • Follow official coding guidelines that require documentation of the NIHSS score and clinical findings
  • Ensure that the score correlates with the patient's clinical presentation and any imaging studies

Exclusion Criteria

Do NOT use R29.703 When
No specific exclusions found.

Related CPT Codes

99285CPT Code

Emergency department visit, high severity

Clinical Scenario

Used when a patient with an NIHSS score of 3 presents to the emergency department.

Documentation Requirements

Document the NIHSS score and clinical findings to support the level of service.

Specialty Considerations

Emergency medicine providers should ensure rapid and accurate documentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of stroke severity, improving the accuracy of clinical data and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of stroke severity, improving the accuracy of clinical data and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    NIHSS Training and Resources

Coding & Billing References

  • •
    NIHSS Training and Resources

Frequently Asked Questions

What does an NIHSS score of 3 indicate?

An NIHSS score of 3 indicates mild neurological impairment, often associated with minor strokes or transient ischemic attacks.