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    OpenPayerBilling CodesDiseases of peritoneum and retroperitoneumICD-10-CM k68-disorders-of-retroperitoneum
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    ICD-10-CM Code For Disorders Of Retroperitoneum: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group K68 includes disorders of the retroperitoneum such as inflammatory and fibrotic conditions affecting the retroperitoneal space and its structures. These ICD-10-CM diagnosis codes are used to document clinical scenarios involving localized retroperitoneal disease, capturing severity, extent of organ involvement, and complications relevant to the condition. Accurate coding within the ICD-10-CM K68 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM K68: Disorders Of Retroperitoneum Overview

    The ICD-10-CM K68 group includes disorders affecting the retroperitoneal space, the anatomical compartment behind the peritoneum that contains organs such as the kidneys, adrenal glands, pancreas, and major blood vessels. These diagnoses represent inflammatory, fibrotic, or other pathologic processes localized to the retroperitoneum that can impact adjacent organs and functions. Accurate coding supports correct clinical documentation and is important for appropriate claim adjudication and reimbursement.

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    When to Use

    Use a code from this group when a patient has a diagnosed retroperitoneal disorder documented by clinical evaluation, imaging, or surgical findings that localizes pathology to the retroperitoneal space. Select the specific K68 code that best reflects the documented diagnosis, laterality if applicable, and any reported complications.

    ICD-10-CM Codes

    6 rows

    ICD-10-CM CodeDescription
    K68.11Postprocedural retroperitoneal abscess
    K68.12Psoas muscle abscess
    K68.19Other retroperitoneal abscess
    K68.2Retroperitoneal fibrosis
    K68.3Retroperitoneal hematoma
    K68.9Other disorders of retroperitoneum

    DRG Codes

    10 rows

    DRG CodeDescription
    371Major Gastrointestinal Disorders and Peritoneal Infections with MCC
    372Major Gastrointestinal Disorders and Peritoneal Infections with CC
    373Major Gastrointestinal Disorders and Peritoneal Infections without CC/MCC
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems
    856Postoperative or Post-Traumatic Infections with O.R. Procedures with MCC
    857Postoperative or Post-Traumatic Infections with O.R. Procedures with CC
    858Postoperative or Post-Traumatic Infections with O.R. Procedures without CC/MCC
    862Postoperative and Post-Traumatic Infections with MCC
    863Postoperative and Post-Traumatic Infections without MCC

    Typical Clinical Scenarios

    • An adult in their 40s presents to the emergency department with sudden severe abdominal and flank pain, fever, and signs of sepsis after a recent abdominal surgery. Imaging (CT scan) demonstrates a localized retroperitoneal abscess tracking along the psoas muscle; drainage is performed and cultures obtained. A code from this group for retroperitoneal abscess is assigned to capture the acute infectious process and procedural management. Typical codes: K68.11, K68.19
    • An elderly patient with longstanding chronic pancreatitis develops progressive retroperitoneal fibrosis causing obstructive symptoms (hydronephrosis and lower extremity edema) over months; they present for outpatient evaluation of chronic abdominal discomfort and renal impairment. Imaging and symptom chronology support a chronic fibrosing process of the retroperitoneum, and a code reflecting retroperitoneal fibrosis is used to document the ongoing, noninfectious fibrotic disorder and guide monitoring. Typical codes: K68.2, K68.3
    • A postoperative inpatient with malignancy treated surgically and with radiation therapy develops nonpurulent retroperitoneal inflammation and adherent tissue noted on follow-up imaging with intermittent nausea and anorexia. This clinical scenario represents a noninfectious retroperitoneal inflammatory complication or unspecified retroperitoneal disorder occurring as a comorbidity of cancer treatment, and a nonspecific or unspecified retroperitoneal diagnosis code is assigned when the exact etiology is not defined. Typical codes: K68.9, K68.12

    Related Codes

    K65-PERITONITIS

    ICD-10-CM Code For Peritonitis: Group Overview

    K66-OTHER-DISORDERS-OF-PERITONEUM

    ICD-10-CM Code For Other Disorders Of Peritoneum: Group Overview

    K67-DISORDERS-OF-PERITONEUM

    ICD-10-CM Code For Disorders Of Peritoneum In Infectious Diseases Classified Elsewhere: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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