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ICD-10 Guide
ICD-10 CodesR83.6

R83.6

Abnormal cytological findings in cerebrospinal fluid

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

Code Description

ICD-10 R83.6 is a billable code used to indicate a diagnosis of abnormal cytological findings in cerebrospinal fluid.

Key Diagnostic Point:

Abnormal cytological findings in cerebrospinal fluid (CSF) refer to atypical cellular components identified during laboratory analysis of CSF obtained via lumbar puncture or other methods. These findings may indicate a range of underlying conditions, including infections (such as meningitis), malignancies (such as primary brain tumors or metastatic disease), inflammatory diseases (like multiple sclerosis), or other neurological disorders. Symptoms associated with abnormal CSF findings can include headache, fever, neck stiffness, altered mental status, and neurological deficits. The interpretation of these findings requires careful correlation with clinical symptoms, imaging studies, and other laboratory results to establish a definitive diagnosis. The presence of abnormal cells, such as atypical lymphocytes or malignant cells, necessitates further investigation and management, often involving oncologists or infectious disease specialists.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of underlying conditions that can cause abnormal findings
  • Need for correlation with clinical symptoms and other diagnostic tests
  • Potential for overlapping symptoms with other neurological conditions
  • Variability in laboratory reporting and interpretation

Audit Risk Factors

  • Inadequate documentation of clinical findings leading to misdiagnosis
  • Failure to specify the underlying cause of abnormal findings
  • Incorrect linkage of symptoms to the abnormal findings
  • Lack of follow-up documentation for abnormal results

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Detailed clinical history, including presenting symptoms and any relevant past medical history.

Common Clinical Scenarios

Patients presenting with neurological symptoms such as headache, fever, or altered mental status.

Billing Considerations

Ensure that the clinical context is well documented to support the diagnosis and any associated conditions.

Emergency Medicine

Documentation Requirements

Acute care documentation must include immediate clinical findings and rationale for lumbar puncture.

Common Clinical Scenarios

Acute presentations of suspected meningitis or encephalitis.

Billing Considerations

Rapid documentation is crucial; ensure that all findings are recorded promptly to support coding.

Coding Guidelines

Inclusion Criteria

Use R83.6 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the code is used in conjunction with specific clinical findings and that the underlying cause is documented when known

Exclusion Criteria

Do NOT use R83.6 When
No specific exclusions found.

Related CPT Codes

62270CPT Code

Lumbar puncture, diagnostic

Clinical Scenario

Used when performing a lumbar puncture to obtain CSF for analysis.

Documentation Requirements

Document the indication for the procedure, patient consent, and any complications.

Specialty Considerations

Ensure that the procedure is documented in the context of the patient's clinical presentation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of abnormal findings, improving the granularity of data for research and clinical management. R83.6 provides a clear designation for abnormal cytological findings, which aids in tracking and managing neurological conditions.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of abnormal findings, improving the granularity of data for research and clinical management. R83.6 provides a clear designation for abnormal cytological findings, which aids in tracking and managing neurological conditions.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of abnormal findings, improving the granularity of data for research and clinical management. R83.6 provides a clear designation for abnormal cytological findings, which aids in tracking and managing neurological conditions.

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 cytological findings in CSF?

Common causes include infections (bacterial, viral, fungal), malignancies (primary brain tumors, metastatic disease), and inflammatory conditions (multiple sclerosis, autoimmune disorders).

How should abnormal findings in CSF be documented?

Documentation should include the clinical context, specific findings from the CSF analysis, any symptoms present, and the rationale for further diagnostic testing or treatment.