ICD Code D75.839

ICD code D75.839 is used to identify a condition known as thrombocytosis, unspecified. This code is applied when a patient has an abnormally high platelet count in the blood, but the specific cause or type of thrombocytosis has not been determined. Platelets are crucial for blood clotting, and an elevated count can lead to complications such as excessive clotting or bleeding. This code helps healthcare providers document and track the condition for treatment and billing purposes.

1. Elevated Platelet Count: The primary diagnostic criterion is a significantly elevated platelet count, typically above 450,000 platelets per microliter of blood, as determined by a complete blood count (CBC) test.

2. Absence of Secondary Causes: Ensure that the thrombocytosis is not secondary to other conditions such as iron deficiency anemia, inflammation, infection, or malignancy. This involves a thorough review of the patient's medical history and additional diagnostic tests to rule out these conditions.

3. Lack of Specific Symptoms: The patient may present with non-specific symptoms or be asymptomatic. Common symptoms, if present, might include headaches, dizziness, or visual disturbances, but these are not definitive for diagnosis.

4. Exclusion of Myeloproliferative Disorders: Conduct tests to exclude myeloproliferative disorders such as essential thrombocythemia or polycythemia vera. This may involve bone marrow biopsy or genetic testing for mutations like JAK2, CALR, or MPL.

5. Persistent Thrombocytosis: Confirm that the elevated platelet count is persistent over time, typically through repeated CBC tests over a period of weeks or months, to rule out transient causes.

6. Review of Medication and Lifestyle Factors: Evaluate the patient's medication use and lifestyle factors that could contribute to elevated platelet counts, such as recent surgery, trauma, or use of certain medications like corticosteroids.

7. Consultation with Hematology: In cases where the cause of thrombocytosis remains unclear, a referral to a hematologist for further evaluation and management may be necessary.

For the ICD code D75.839 (Thrombocytosis, unspecified), the relevant CPT codes that may be applicable for treatment or management include:

1. 85055 - Reticulated platelet assay

2. 85060 - Blood smear, peripheral, interpretation by physician with written report

3. 85097 - Bone marrow, smear interpretation

4. 86077 - Blood bank physician services; difficult crossmatch and/or evaluation of irregular antibody(s), interpretation and written report

5. 86140 - C-reactive protein; quantitative

These CPT codes are examples of procedures and tests that might be used in the evaluation and management of thrombocytosis. It's important to note that the selection of CPT codes should be based on the specific services provided and the clinical context. Always consult with coding guidelines and payer policies to ensure accurate coding and billing.

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