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ICD-10 Guide
ICD-10 CodesD75.839

D75.839

Billable

Thrombocytosis, unspecified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 D75.839 is a billable code used to indicate a diagnosis of thrombocytosis, unspecified.

Key Diagnostic Point:

Thrombocytosis is a condition characterized by an elevated platelet count in the blood, which can be classified as primary or secondary. In the case of D75.839, the thrombocytosis is unspecified, meaning that the underlying cause has not been determined or documented. This condition can arise from various factors, including inflammation, infection, iron deficiency, or as a response to certain medications. It is essential to differentiate thrombocytosis from other hematological disorders, such as thrombocythemia, which is a primary condition. Patients may present with symptoms related to increased platelet counts, such as headaches, dizziness, or an increased risk of thrombosis. The condition can also be associated with other blood disorders, including neutropenia and white blood cell disorders, where the balance of blood components is disrupted. Understanding the underlying causes is crucial for appropriate management and treatment, as thrombocytosis can be a marker for more severe underlying conditions, including malignancies or chronic inflammatory diseases.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between primary and secondary thrombocytosis
  • Need for comprehensive patient history to identify underlying causes
  • Potential overlap with other hematological disorders
  • Variability in clinical presentation and symptoms

Audit Risk Factors

  • Insufficient documentation of the underlying cause of thrombocytosis
  • Failure to document associated symptoms or conditions
  • Inadequate laboratory result interpretation
  • Misclassification of thrombocytosis as a primary condition

Specialty Focus

Medical Specialties

Hematology

Documentation Requirements

Detailed patient history, laboratory results, and treatment plans must be documented.

Common Clinical Scenarios

Patients presenting with elevated platelet counts, unexplained bleeding or clotting issues.

Billing Considerations

Consideration of other hematological disorders and the need for further diagnostic testing.

Oncology

Documentation Requirements

Documentation of any malignancies or related conditions that may contribute to thrombocytosis.

Common Clinical Scenarios

Patients with cancer presenting with thrombocytosis as a paraneoplastic syndrome.

Billing Considerations

Need for comprehensive cancer staging and treatment documentation.

Coding Guidelines

Inclusion Criteria

Use D75.839 When
  • Follow official ICD
  • 10 coding guidelines, ensuring accurate documentation of the condition and any associated symptoms or underlying causes

Exclusion Criteria

Do NOT use D75.839 When
  • Exclude conditions that are specifically defined in other codes

Related ICD-10 Codes

Related CPT Codes

85025CPT Code

Complete blood count (CBC) with differential

Clinical Scenario

Used to evaluate platelet counts in patients suspected of having thrombocytosis.

Documentation Requirements

Document the reason for the CBC and any relevant clinical findings.

Specialty Considerations

Hematology specialists should ensure comprehensive lab interpretation.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of thrombocytosis, enabling better tracking of the condition and its underlying causes, which can improve patient management and treatment outcomes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of thrombocytosis, enabling better tracking of the condition and its underlying causes, which can improve patient management and treatment outcomes.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of thrombocytosis, enabling better tracking of the condition and its underlying causes, which can improve patient management and treatment outcomes.

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 is the difference between thrombocytosis and thrombocythemia?

Thrombocytosis refers to an elevated platelet count, which can be secondary to various conditions, while thrombocythemia is a primary condition characterized by an overproduction of platelets due to a bone marrow disorder.