2027 ICD-10-CM Diagnosis Code K68.9Other disorders of retroperitoneum

ICD-10-CM Codes›K00–K95›K65-K6A›K68

ICD-10-CM K68.9
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

K68.9 is a billable ICD-10-CM diagnosis code for other disorders of retroperitoneum. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 371 through 373, 791, 793. As a secondary diagnosis, it counts as a major complication or comorbidity (MCC) and places an inpatient stay in the highest severity level of its MS-DRG family. It does not count, however, when the principal diagnosis is one of 25 closely related codes. Coders also document this condition as disorder of retroperitoneal region, excluding major organs. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders.

Code Identity

ICD-10-CM Code
K68.9
Billable Status
Yes — Valid for Submission
Code Describes
Other disorders of retroperitoneum
Short Description
Other disorders of retroperitoneum
Same as the full description in the CMS dataset.
Parent Code
K68
Disorders of retroperitoneum

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK65-K6ADiseases of peritoneum and retroperitoneum
CategoryK68Disorders of retroperitoneum
This CodeK68.9Other disorders of retroperitoneum

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Disorder of retroperitoneal region, excluding major organs
  • Disorder of retroperitoneum
  • Pneumoretroperitoneum
  • Retroperitoneal cyst
  • Retroperitoneal fat necrosis
  • Retroperitoneal infection

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to K68.9: its own notes plus those printed at Chapter 11. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Chapter 11 (K00-K95) Diseases of the digestive system applies to 863 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name K68.9, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming K68.9: they are not reported together with it, unless the two conditions are unrelated.

  • K65 Peritonitis
    retroperitoneal infections (K68.-) names K68.-, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG025
Other specified and unspecified gastrointestinal disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Abscess

An abscess is a pocket of pus. You can get an abscess almost anywhere in your body. When an area of your body becomes infected, your body's immune system tries to fight the infection. White blood cells go to the infected area, collect within the damaged tissue, and cause inflammation. During this process, pus forms.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert K68.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
567.39 Retroperiton infect NEC
Approximate The match is approximate rather than exact.
ICD-9-CM
568.89 Peritoneal disorder NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About K68.9Overview

What is the ICD-10 code for other disorders of retroperitoneum?

The ICD-10-CM code for other disorders of retroperitoneum is K68.9 (sometimes written as K689). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is K68.9 (Disorders of retroperitoneum) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other disorders of retroperitoneum on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does K68.9 group to?

When other disorders of retroperitoneum is the principal diagnosis on an inpatient stay, it groups to MS-DRG 372, 793, 791, 371, 373, with relative weights from 0.6945 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.

Is K68.9 a CC or MCC?

CMS lists K68.9 as an MCC (major complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it places the inpatient stay in the highest-weighted DRG of its severity family. It does not count when the principal diagnosis is one of the 25 closely related codes in its exclusion list.

What is the ICD-9 equivalent of K68.9?

Under the General Equivalence Mappings, other disorders of retroperitoneum converts to ICD-9-CM 567.39 (retroperiton infect NEC) and 568.89 (peritoneal disorder NEC). The mapping is approximate, so confirm the match fits the documentation.