ICD-10 Code D73.4 – Cyst of spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D73.4 – Cyst of spleen
What it is
D73.4 identifies a cyst located in the spleen, meaning a fluid-filled or cystic lesion documented in that organ. Use it when the record specifically states a splenic cyst.
Clinical signs
Clinical features vary; refer to documentation. Splenic cysts may be incidental imaging findings or associated with left upper quadrant discomfort, abdominal fullness, or splenomegaly if the chart reports them.
When to use this code
Use D73.4 when imaging, operative notes, or the provider’s assessment clearly documents a cyst of the spleen. It is appropriate for congenital, post-traumatic, or other specified splenic cysts if no more specific code is recorded.
If the note only says “splenic lesion” or “mass,” do not assume a cyst. Check documentation and code the confirmed diagnosis.
Do not use for
Do not use this code for cysts in other organs, nonspecific abdominal cysts, or splenic abscesses. If the spleen finding is not confirmed as a cyst, verify the documentation first.
Coding tip
Capture the exact anatomic site and wording from the provider’s final diagnosis or imaging impression.