Leukocytosis ICD-10-CM Codes

Explore ICD-10-CM codes for leukocytosis, including D72.829, used to document elevated white blood cells and related immune or blood disorders.

By Wynona Jugueta on Aug 8, 2025.

Fact Checked by Gale Alagos.

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What are Leukocytosis ICD-10-CM Codes?

ICD-10 codes are standardized across the medical field to accurately document diseases, conditions, and symptoms in patient records. They also play a crucial role in medical billing and insurance claims. These codes ensure consistency and ease of communication between different healthcare providers and institutions, especially when managing disorders involving blood-forming organs and immunity disorders.

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. It indicates a higher-than-normal white blood cell count, which can be due to infections, inflammation, stress, medications, or other underlying conditions.

This code refers to an unspecified elevation in the number of leukocytes, or white blood cells. It's often used when the exact cause of leukocytosis is unknown or not specified. It also helps identify other disorders linked to blood and the immune mechanism that result in a transient increase in white blood cells.

The 'D72' in the code refers to 'Other disorders of white blood cells', and the '.829' specifies it to leukocytosis that's not further specified. This parent code encompasses a range of functional disorders and unspecified diseases associated with elevated leukocytes.

Which Leukocytosis ICD-10-CM Codes are billable?

D72.829 is a billable code, categorized under certain disorders of blood and blood-forming organs.

Clinical information

Leukocytosis refers to a transient increase in the number of white blood cells, or leukocytes, in a body fluid. This increase in white blood cells may relate to specific diseases classified under disorders of white blood cells or may arise from genetic anomalies affecting immune responses.
It is typically a response to infection, inflammation, or other conditions that stimulate the production of these cells. In some cases, it may be associated with spleen-related conditions like spleen infarction or a spleen cyst. However, this is not specifically coded under D72.829 unless the underlying cause is documented separately.
Diagnosing and treating leukocytosis is crucial as it often indicates an underlying health problem. The presence of an elevated white blood cell count or an abnormal blood cell count, unspecified, often warrants further investigation into disorders, diseases, or syndromes related to the spleen and immune function.
Understanding and accurately using the appropriate ICD-10 codes for leukocytosis ensures effective communication among healthcare providers and accurate billing. An additional code may be required to better capture the full clinical picture, especially in symptomatic cases or when related disorders are present.

Synonyms include

Elevated leukocytes
Leukocytosis (increase white blood cells in blood)
Increased white blood cell count
High WBC count
Elevated WBC levels

Other related codes

D72.820 - Lymphocytosis (symptomatic): Used for cases with an elevated lymphocyte count, a specific subtype of white blood cells. Relevant for symptomatic lymphocytosis and related conditions.
D72.821 - Monocytosis (symptomatic): Indicates an abnormal increase in monocytes, another subtype of white blood cells. Used when monocytosis is symptomatic.
D72.822 - Plasmacytosis: Represents increased plasma cells, a specific white blood cell type, and is used for related medical conditions involving immunity disorders or blood.

Commonly asked questions

A leukocytosis ICD code should be used when a documented increase in white blood cell count requires clinical attention, especially when the exact cause is unspecified. It is commonly applied in infection, inflammation, or other disorders involving the immune system or blood-forming organs.

Treatment for leukocytosis depends on the underlying cause and may include antibiotics for infections, anti-inflammatory drugs, or medications to address immune or blood disorders. In some cases, managing related conditions like spleen disorders or functional immune abnormalities is also necessary.

A diagnosis code for leukocytosis indicates an abnormally high white blood cell count in the patient’s blood or body fluid. It helps healthcare providers identify potential immune or hematologic disorders and ensures accurate documentation for treatment and billing.

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