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v1.0.0
ICD-10 Guide
ICD-10 CodesR29.720

R29.720

NIHSS score 20

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

Code Description

ICD-10 R29.720 is a billable code used to indicate a diagnosis of nihss score 20.

Key Diagnostic Point:

The NIHSS (National Institutes of Health Stroke Scale) score of 20 indicates a severe level of neurological impairment due to a stroke. This score is derived from a comprehensive assessment of various neurological functions, including consciousness, language, motor skills, sensory perception, and visual fields. A score of 20 suggests significant deficits in these areas, which may include severe aphasia, hemiparesis, or neglect. Patients with such a score often require immediate medical intervention and intensive rehabilitation services. The NIHSS is a critical tool used in both acute and post-acute settings to evaluate the severity of a stroke and to guide treatment decisions. It is essential for coders to understand the implications of this score, as it reflects not only the clinical status of the patient but also influences the coding of associated conditions and the level of care required.

Code Complexity Analysis

Complexity Rating: High

High Complexity

Complexity Factors

  • Interpretation of NIHSS scores can vary based on clinical context.
  • Documentation must clearly reflect the severity indicated by the score.
  • Potential for overlap with other neurological conditions.
  • Need for comprehensive understanding of stroke management protocols.

Audit Risk Factors

  • Inadequate documentation of the NIHSS assessment.
  • Failure to link the NIHSS score to the clinical diagnosis of stroke.
  • Misinterpretation of the score leading to incorrect coding.
  • Lack of clarity on the patient's functional status post-stroke.

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed documentation of neurological assessments, including NIHSS scores and any associated findings.

Common Clinical Scenarios

Patients presenting with acute stroke symptoms requiring hospitalization and management.

Billing Considerations

Ensure that all relevant comorbidities and complications are documented to support the severity of the condition.

Emergency Medicine

Documentation Requirements

Immediate documentation of NIHSS scores upon patient presentation and any interventions performed.

Common Clinical Scenarios

Acute stroke presentations requiring rapid assessment and treatment.

Billing Considerations

Timeliness of documentation is critical; ensure that all assessments are recorded promptly to support coding.

Coding Guidelines

Inclusion Criteria

Use R29.720 When
  • Coders should refer to the official ICD
  • CM coding guidelines, particularly those related to stroke and neurological conditions
  • Accurate coding requires a clear understanding of the NIHSS scoring system and its implications for patient care

Exclusion Criteria

Do NOT use R29.720 When
No specific exclusions found.

Related CPT Codes

99285CPT Code

Emergency department visit, high severity

Clinical Scenario

Used when a patient with a NIHSS score of 20 presents to the emergency department.

Documentation Requirements

Document the severity of symptoms, NIHSS score, and any interventions performed.

Specialty Considerations

Emergency medicine providers should ensure timely and accurate documentation to support the level of service billed.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of stroke-related conditions, including the use of NIHSS scores to reflect the severity of neurological impairment. This specificity aids in better resource allocation and treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of stroke-related conditions, including the use of NIHSS scores to reflect the severity of neurological impairment. This specificity aids in better resource allocation and treatment planning.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of stroke-related conditions, including the use of NIHSS scores to reflect the severity of neurological impairment. This specificity aids in better resource allocation and treatment planning.

Resources

Clinical References

  • •
    NIHSS Training and Resources

Coding & Billing References

  • •
    NIHSS Training and Resources

Frequently Asked Questions

What does an NIHSS score of 20 indicate?

An NIHSS score of 20 indicates severe neurological impairment, suggesting significant deficits in motor function, language, and other cognitive abilities, typically associated with a major stroke.