2027 ICD-10-CM Diagnosis Code K66.0Peritoneal adhesions (postprocedural) (postinfection)
ICD-10-CM Codes›K00–K95›K65-K6A›K66
- Billable — Valid for Submission
- Not Chronic
K66.0 is a billable ICD-10-CM diagnosis code for peritoneal adhesions (postprocedural) (postinfection). It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 393 through 395. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified gastrointestinal disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Adhesion of abdominal wall
- Adhesion of diaphragm
- Adhesion of intestine
- Adhesion of mesentery
- Adhesion of omentum
- Adhesion of pelvic peritoneum
- Adhesion of pelvis
- Adhesion of stomach
- Colonic adhesions
- Duodenal adhesions
- Entrapment of intestine in abdominal adhesions
- Ileal adhesions
- Ileocecal adhesions
- Intestinal entrapment
- Jejunal adhesions
- Large bowel adhesions
- Male pelvic adhesions
- Periappendiceal adhesions
- Perirectal adhesions
- Peritoneal adhesion
- Pyloric adhesions
- Sigmoid flexure adhesions
- Small bowel adhesions
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K66.0: its own notes plus those printed at K66 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Adhesions (of) abdominal (wall)
- Adhesions (of) diaphragm
- Adhesions (of) intestine
- Adhesions (of) male pelvis
- Adhesions (of) omentum
- Adhesions (of) stomach
- Adhesive bands
- Mesenteric adhesions
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
- peritoneal adhesions with intestinal obstruction (K56.5-)
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.
- 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.
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.
Patient EducationClinical
Adhesions
Adhesions are bands of scar-like tissue. Normally, internal tissues and organs have slippery surfaces so they can shift easily as the body moves. Adhesions cause tissues and organs to stick together. They might connect the loops of the intestines to each other, to nearby organs, or to the wall of the abdomen.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K66.0 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K66.0Overview
What is the ICD-10 code for peritoneal adhesions (postprocedural) (postinfection)?
The ICD-10-CM code for peritoneal adhesions (postprocedural) (postinfection) is K66.0 (sometimes written as K660). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K66.0 (Other disorders of peritoneum) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report peritoneal adhesions (postprocedural) (postinfection) on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K66.0 group to?
When peritoneal adhesions (postprocedural) (postinfection) is the principal diagnosis on an inpatient stay, it groups to MS-DRG 394, 395, 393, with relative weights from 0.6379 to 1.5877 depending on complications. Higher weights mean higher Medicare reimbursement.
Can K66.0 be reported with a code from K56.5?
Not as a rule. The Excludes1 note on K66.0 lists "peritoneal adhesions with intestinal obstruction (K56.5-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of K66.0?
Under the General Equivalence Mappings, peritoneal adhesions (postprocedural) (postinfection) converts to ICD-9-CM 568.0 (peritoneal adhesions). The mapping is approximate, so confirm the match fits the documentation.
