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ICD-10 Coding for Hairy Cell Leukemia(C91.4, C83.39, D61.818)

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Comprehensive guide for coding and documenting hairy cell leukemia (ICD-10 C91.4), including diagnostic criteria, documentation requirements, and billing considerations.

Also known as:
HCLLeukemic Reticuloendotheliosis
Related ICD-10 Code Ranges

Complete code families applicable to Hairy Cell Leukemia

C00-D49Primary Range

Neoplasms

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Primary ICD-10-CM Codes
Hairy cell leukemia
C91.4
Differential Codes

Alternative codes to consider when ruling out similar conditions

Other lymphoid leukemiaC91

Use for HCL-variant, especially if C

-D25

Use for HCL-variant, especially if C

Splenic marginal zone lymphomaC83.39

Use when splenic involvement is primary and lacks HCL immunophenotype.

Documentation & Coding Risks

Avoid these common issues when documenting Hairy Cell Leukemia.

Failing to specify the type of leukemia.

Impact

Clinical: May lead to inappropriate treatment plans., Regulatory: Non-compliance with documentation standards., Financial: Potential for denied claims or incorrect reimbursement.

Mitigation

Always specify leukemia type in documentation., Include immunophenotyping results.

Coding HCL without confirming BRAF mutation status.

Impact

Reimbursement: Incorrect coding may lead to denied claims., Compliance: Non-compliance with coding guidelines., Data Quality: Inaccurate clinical data representation.

Mitigation

Ensure BRAF mutation testing is documented if performed.

Incomplete Documentation

Impact

Risk of audits due to missing immunophenotyping or molecular testing details.

Mitigation

Implement checklist for required documentation elements in HCL cases.

Frequently Asked Questions

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with C91.4.