What Is the ICD-10 Code for Leukocytosis? The ICD-10-CM code for leukocytosis is D72.829, designated as Elevated white blood cell count, unspecified. This is a billable diagnosis code valid from through per CMS and NCHS guidelines.
This guide explains ICD-10 coding for leukocytosis (D72.829), gives documentation checklists, shows how to avoid denials, and provides real case-based examples.
Leukocytosis is coded D72.829 in ICD-10 under Chapter 3: Diseases of the Blood and Blood-forming Organs (D50-D89). It is utilized when there exists an unusual increase in white blood cell count but no specific white blood cell line is identified in the diagnostic results.
In the ICD-10-CM hierarchy, D72.829 serves as the “default” code for leukocytosis when the documentation does not provide enough detail to select a more specific subcategory. It falls under Chapter 3: Diseases of the Blood and Blood-forming Organs.
Leukocytosis is a condition where there is a higher than normal number of white blood cells (WBCs) in the blood. This condition can indicate various underlying health issues, making it essential for healthcare providers to accurately document and code it using the ICD-10 system.
As of 2025, the primary ICD-10 code used for leukocytosis is: D72.829 - Elevated white blood cell count, unspecified: This is the most commonly used and billable ICD-10-CM code for leukocytosis when the exact cause or type of elevated white blood cells is not specified.
Learn how leukocytosis ICD-10 coding affects reimbursement, compliance, and denials. Covers D72.829 use, documentation rules, sequencing, and billing impact.
ICD-10 Code for Leukocytosis: A Comprehensive Guideline Leukocytosis (D72.829) is a common ICD-10 code used to reflect high white blood cell counts in clinical contexts.