D70.3 Neutropenia due to infection

Name of the Condition

• Neutropenia due to infection

Summary

Neutropenia due to infection is a condition characterized by a reduced number of neutrophils, a type of white blood cell critical for fighting infections. This reduction occurs as a direct result of an infectious process, which can impair neutrophil production or increase their consumption. The condition increases susceptibility to further infections and typically resolves as the underlying infection is treated.

Causes

Neutropenia due to infection is caused by infectious agents that disrupt neutrophil production or function. Viral infections, such as hepatitis, Epstein-Barr virus, or cytomegalovirus, are common causes, as they can suppress bone marrow activity. Bacterial infections, particularly sepsis, may also lead to neutropenia by increasing neutrophil utilization or damaging bone marrow. Parasitic or fungal infections can similarly impact neutrophil levels.

Risk Factors

• Severe or prolonged infections (e.g., sepsis, viral hepatitis)
• Immunocompromised states (e.g., HIV, chemotherapy-induced immunosuppression)
• Advanced age
• Malnutrition or vitamin deficiencies
• Chronic diseases affecting bone marrow function

Symptoms

• Fever and chills
• Fatigue or weakness
• Increased susceptibility to infections
• Skin infections or abscesses
• Respiratory infections (e.g., pneumonia)
• Mouth ulcers or gum infections

Diagnosis

Diagnosis is confirmed through blood tests showing a reduced neutrophil count, typically below 1,500 cells per microliter. A detailed patient history, including recent infections or illnesses, is essential. Additional tests, such as viral or bacterial cultures, may be performed to identify the underlying infection. Bone marrow examination is rarely needed but may be considered if the cause is unclear.

Treatment Options

Treatment focuses on addressing the underlying infection with appropriate antimicrobial therapy. Supportive care, such as fever management and infection prevention, is also important. In severe cases, granulocyte colony-stimulating factors (G-CSFs) may be used to stimulate neutrophil production. Monitoring neutrophil levels and adjusting treatment based on the infection's response is standard.

Prognosis and Follow-Up

Prognosis depends on the severity of the infection and the patient's overall health. Most cases resolve with effective treatment of the underlying infection. Follow-up blood tests may be needed to monitor neutrophil recovery. Patients with persistent neutropenia or recurrent infections may require ongoing evaluation for underlying conditions.

Complications

• Increased risk of severe or life-threatening infections
• Delayed wound healing
• Sepsis or septic shock
• Prolonged hospitalization
• Recurrence of neutropenia with future infections

Lifestyle & Prevention

• Practice good hygiene to reduce infection risk
• Avoid close contact with individuals who have active infections
• Ensure adequate nutrition to support immune function
• Stay up-to-date with vaccinations (as appropriate)
• Seek prompt medical care for signs of infection

When to Seek Professional Help

• Persistent fever or chills
• New or worsening infections
• Unexplained fatigue or weakness
• Signs of sepsis (e.g., rapid heart rate, confusion)
• Recurrent infections despite treatment

Tips for Medical Coders

When coding for neutropenia due to infection, ensure the documentation clearly links the neutropenia to an infectious process. Verify that the underlying infection is documented and coded appropriately. Avoid coding neutropenia as a primary diagnosis if it is a secondary effect of another condition unless specified. Confirm the code D70.3 is used only when the neutropenia is directly attributed to an infection.