2027 ICD-10-CM Diagnosis Code K56.691Other complete intestinal obstruction
ICD-10-CM Codes›K00–K95›K55-K64›K56
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Risk Adjusts — HCC 78
- Not Chronic
K56.691 is a billable ICD-10-CM diagnosis code for other complete intestinal obstruction. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 388 through 390, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 29 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Intestinal obstruction and ileus.
For Medicare Advantage risk adjustment, K56.691 maps to CMS-HCC Category 78 (Intestinal Obstruction/Perforation) under the V28 model, adding a risk factor of about 0.326 for a community, non-dual, aged beneficiary in payment year 2027.
Code Identity
Code Classification
Medicare Risk Adjustment (HCC)Billing
K56.691 maps to a payment category in the CMS-HCC model used to risk-adjust Medicare Advantage payments. Weights are the published community factors for payment year 2027.
Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to K56.691: its own notes plus those printed at K56 and Chapter 11. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
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.
- stenosis of anus or rectum (K62.4)
- 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 K56.691, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming K56.691: they are not reported together with it, unless the two conditions are unrelated.
- K56.0 Paralytic ileusobstructive ileus NOS (K56.69-) names K56.69-, which includes this code
- K56.7 Ileus, unspecifiedobstructive ileus (K56.69-) names K56.69-, which includes this code
- P76.8 Other specified intestinal obstruction of newbornintestinal obstruction classifiable to K56.- names K56.-, which includes this code
Excludes2 1
These codes carry an Excludes2 note naming K56.691: its condition is not part of those codes, and both may be reported when the patient has both.
- Block R10-R19 Symptoms and signs involving the digestive system and abdomenintestinal obstruction (K56.-) names K56.-, 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.
Patient EducationClinical
Intestinal Obstruction
An intestinal obstruction occurs when food or stool cannot move through the intestines. The obstruction can be complete or partial. There are many causes. The most common are adhesions, hernias, cancers, and certain medicines.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert K56.691 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code History & ChangesHistory
Replacement K56.691 replaces the following previously assigned code(s):
- K56.69 - Other intestinal obstruction
Questions About K56.691Overview
What is the ICD-10 code for other complete intestinal obstruction?
The ICD-10-CM code for other complete intestinal obstruction is K56.691 (sometimes written as K56691). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is K56.691 (Other intestinal obstruction) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other complete intestinal obstruction on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does K56.691 group to?
When other complete intestinal obstruction is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 389, 388, 390, with relative weights from 0.5403 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is K56.691 a CC or MCC?
CMS lists K56.691 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 29 closely related codes in its exclusion list.
Can K56.691 be reported with E84.11?
Not as a rule. The Excludes1 note at K56, which applies to K56.691, lists "cystic fibrosis with meconium ileus (E84.11)". 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 HCC is K56.691?
K56.691 (other complete intestinal obstruction) maps to CMS-HCC Category 78 (Intestinal Obstruction/Perforation), commonly written as HCC 78, in the CMS-HCC V28 model used for Medicare Advantage risk adjustment in payment year 2027. It mapped to HCC 33 under the retired V24 model. It also maps in the PACE (CMS-HCC V22), ESRD (V21), and ESRD (V24) models. It does not map to any RxHCC in the Part D prescription drug model.
Does K56.691 risk-adjust for Medicare Advantage payment?
Yes. When documented and reported on a Medicare Advantage encounter, K56.691 adds a risk adjustment factor of about 0.326 to the beneficiary's RAF score for a community, non-dual, aged enrollee (published V28 weights range from 0.326 to 0.688 depending on the payment segment). A more severe related category (HCC 77) supersedes it when both are reported. See the full factor table on the HCC 78 category page.
