ICD-10 Code D70.4 – Cyclic neutropenia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D70.4 – Cyclic neutropenia
What it is
Cyclic neutropenia is a rare blood disorder with recurring drops in neutrophils, a type of white blood cell. The low counts come and go in a predictable pattern, which can increase infection risk.
Clinical signs
Patients may have repeated fevers, mouth ulcers, sore throat, or infections during neutropenic episodes. Clinical features vary; refer to documentation.
When to use this code
Use D70.4 when the provider documents cyclic neutropenia or a clearly described cyclical pattern of neutrophil deficiency. Code it for confirmed diagnosis in outpatient, inpatient, or problem-list documentation. Check documentation if the note only says neutropenia without the cyclic pattern.
Do not use for
Do not use this code for transient, drug-induced, or unspecified neutropenia. If the record does not support a cyclic pattern, choose the documented neutropenia type instead.
Coding tip
Look for repeated episodes and explicit provider wording before assigning D70.4.