ICD-10 Code K68.19 – Other retroperitoneal abscess (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K68.19 – Other retroperitoneal abscess
What it is
K68.19 identifies a localized abscess in the retroperitoneal space that is not otherwise specified. Use it for a documented retroperitoneal collection of pus when the record does not name a more specific retroperitoneal infection.
Clinical signs
Clinical features vary; refer to documentation. Patients may have deep abdominal or flank pain, fever, tenderness, or signs of systemic infection, but imaging is often needed to confirm the retroperitoneal location.
When to use this code
Use K68.19 when the provider documents an abscess in the retroperitoneum and no more specific code applies. It also fits cases described as retroperitoneal abscess, retroperitoneal collection, or deep space abscess if the site is clearly retroperitoneal. Check documentation for the exact anatomic source and any associated condition.
Do not use for
Do not use this code for intraperitoneal, psoas, renal, or other organ-specific abscesses unless the record clearly states retroperitoneal involvement. If documentation is nonspecific or conflicting, check documentation.
Coding tip
Code the abscess site exactly as documented and capture any underlying cause or related infection when the record supports it.