Crystal's MCW Coder Hub🧬 ICD-10-CM K56.7 — Ileus, Unspecified
Billable Code Confirmed — 5 Characters Complete
ICD-10 CM K56.7 is a valid, billable 5-character ICD-10-CM code for FY2025/2026. Complete as written.
Unspecified Code — Use With Caution / Query First
ICD-10 CM K56.7 is the ileus code of last resort — use it ONLY when the type of ileus is genuinely undocumented or unknown. It is the CDI query trigger for the K56 family. Physician documents “ileus” without specifying type → K56.7 interim → CDI query → resolve to specific code when response received. A more specific code is ALWAYS preferred when documentation supports it.
Excludes1 — K56.7 and K56.0 Are Mutually Exclusive
FY2024 Coding Clinic Update Applies Here Too
🔍 Code Description
ICD-10 CM K56.7 classifies ileus, unspecified — a failure of intestinal motility or a bowel obstruction in which the specific type (paralytic vs. mechanical; and if mechanical, the specific mechanism) has not been documented or is not yet determinable from the medical record. The condition itself is real and documented — the intestine is not moving normally, contents are not passing — but the physician has written only “ileus” without specifying whether the bowel failure is functional (paralytic) or structural (mechanical), or whether it represents a complete vs. partial obstruction.
**ICD-10 CM K56.7*r the ICD-10 CM holding code — clinically acceptable for interim use when documentation is genuinely incomplete, but it should always prompt a CDI query to resolve to a more specific code.It is never the preferred endpoint. The moment the physician documents “paralytic,” “adynamic,” “functional,” or names a mechanical cause (adhesions, volvulus, impaction) — K56.7 is replaced by the appropriate specific coder-r## 🔑 K56.7 as the Queryrgger — The Decision Trer> [!important] When to rK56.7 and When to Query Away From It
rPhysician documents "ilr or "bowel obstruction" │r▼rIs a specific type docured? ┌──────────────────────r─────────┐ │ Paralytic / adynamic rnctional │ → K56.0 — DO NOT use K56.7 │ Adhesions with obstrurn │ → K56.5x │ Volvulus │ → K56.2r│ Intussusception │ → Kr │ Fecal impaction │ → Kr1 │ Gallstone ileus │ → Kr │ Postprocedural compliron │ → K91.3- └──────────────────────r─────────┘ │r▼ None of the above docrted Type genuinely unknown r6.7 INTERIM │r▼rCDI Query → "Can you plr specify whether the ileus is paralytic rctional) or mechanical (obstructiverf mechanical, what is the suspected cr (adhesions, volvulus, impaction, otr?" │r▼rResponse received → Repr K56.7 with appropriate specifrode r-r## 📊 K56.7 in the K56 CrFamilr| Code | Description | r | Use When |
|---|---|---|—r| K56.0 | Paralyticrus | Functional — no peristalsis | Paralytic / adynamic documented — Excludes1 vs. K56.7 |
| K56.1 | Intussuscron | Mechanical | Bowel telescoping documented |
| K56.2 | Volvulus rchanical | Bowel twisting documented |
| K56.3 | Gallstonerus | Mechanical | Gallstone in bowel lumen |
| K56.41 | Fecal imrion | Mechanical | Impacted stool |
| K56.5x | Adhesions wirbstruction | Mechanical | Adhesion bands — partial/complete |
| K56.69x | Other obstrron | Mechanical | Mechanical cause, other specified |
| K56.7 | Ilerunspecified ← This Code | Unknown | Type not documented — query trigger r-r## 🏥 CDI Query — When arow to Use Ir### When K56.7 Shourrigger a Querr| Documentation | QueryrWhy |
|---|---|—r| “Ileus” — no further ril | ✅ Yes | Type unknown — K56.7 interim pending query |
| “Ileus vs. obstructior ✅ Yes | Differential — query for confirmed diagnosis |
| “Possible ileus” | ✅ r| Uncertain diagnosis — acceptable outpatient only; inpatient query for confirmed type |
| “Bowel dysmotility” |res | May map to K56.0 — query for paralytic vs. other |
| “Adynamic ileus” | ❌ r This IS paralytic → K56.0 directly |
| “Paralytic ileus” | ❌r| Specific — K56.0 directly |
| “Small bowel obstructr | ❌ No | Mechanical → K56.5x (adhesions), K56.69x, or other mechanical code — query for cause, not for K56.7 r### Sample CDI Query Largr> **Query to Physician:r> “The medical record drents ‘ileus’ for this encounter. To ensure the most accurate code assignment, can you please clarify:
- Is this a paralyr(functional/adynamic) ileus — loss of bowel motility without mechanical obstruction?
- Or is this a mecrcal obstruction — and if so, what is the suspected cause (adhesions, volvulus, fecal impaction, other)?
- If postprocedural r this a complication directly attributable to the surgical procedure performed?r> Current documentationrports: K56.7 (Ileus, unspecified) — a more specific code is preferred when type is documented.r---
💊 Coding Scenarios
Scenario 1 — “Ileus” in the Progress Note — Query Required (K56.7 Interim)
Clinical Vignette: An 81-year-old male is admitted with abdominal distension and nausea. Hospitalist documents “ileus” in the assessment. CT abdomen: dilated loops of small bowel, no clear transition point identified. No prior abdominal surgery. CDI query sent — response pending.
ICD-10-CM (Interim — Pending Query):
- K56.7 — Ileus, unspecified (interim — pending CDI query for type)
ICD-10-CM (After Query Response — Example A: Paralytic):
- K56.0 — Paralytic ileus (replace K56.7 when physician confirms paralytic type)
ICD-10-CM (After Query Response — Example B: SBO from Adhesions):
- K56.51 — Intestinal adhesions with partial obstruction (replace K56.7 when mechanical cause confirmed)
Scenario 2 — Post-Op Patient, “Ileus” Documented — K91.3- vs. K56.7 Decision
Clinical Vignette: A 55-year-old female, post-op day 2 following laparoscopic cholecystectomy. Surgeon documents: “Post-op ileus” in progress note — no further specification. No CDI query submitted yet.
Correct Approach:
- First check — is this a postprocedural complication of the cholecystectomy? → K56 Excludes1: postprocedural intestinal obstruction → K91.3- [web:327]
- “Post-op ileus” explicitly attributing the ileus to the procedure → K91.30 is the correct interim code — NOT K56.7
- If attribution to the procedure is ambiguous → query: “Is this ileus a direct complication of the laparoscopic cholecystectomy, or is it due to another cause occurring in the postoperative period (opioids, metabolic, etc.)?”
"Post-Op Ileus" ≠ K56.7 Default
The instinct to reach for K56.7 when “post-op ileus” is documented is common but often wrong — the Excludes1 on K56 for postprocedural intestinal obstruction (K91.3-) means the procedural complication code takes priority when the ileus is attributed to the procedure. [web:327] K56.7 is appropriate when the ileus is postoperative in timing but NOT in causation.
Scenario 3 — “Ileus” on Discharge Summary — Confirmed Unspecified (K56.7 Final)
Clinical Vignette: An 88-year-old female with advanced dementia is admitted from a nursing home. Multiple comorbidities. Discharge summary documents “ileus — treated conservatively; resolved with bowel rest and IV fluids.” No further specification. CDI query was submitted — physician responded: “Type not further specified; resolved with supportive care.”
ICD-10-CM (Final):
- K56.7 — Ileus, unspecified (acceptable as final code — physician queried, responded with no further specificity; K56.7 accurately reflects what is known)
- Additional comorbidity codes per documentation
K56.7 Is Acceptable as a Final Code When Query Yields No Specificity
Per ICD-10-CM guidelines: “Unspecified codes are acceptable when clinical information is unknown or not available about a particular condition.” When a CDI query has been made and the physician confirms no further specification is possible or appropriate, K56.7 is the correct final code — not a coding deficiency. The deficiency would be failing to query in the first place.
🔗 Related ICD-10-CM Codes
The K56.7 Resolution Map — Where Queries Lead
| Query Response | Replace K56.7 With |
|---|---|
| Paralytic / adynamic / functional ileus | K56.0 |
| Small bowel obstruction — adhesions, partial | K56.51 |
| Small bowel obstruction — adhesions, complete | K56.52 |
| Volvulus | K56.2 |
| Intussusception | K56.1 |
| Fecal impaction | K56.41 |
| Gallstone ileus | K56.3 |
| Mechanical, cause unspecified, partial | K56.691 |
| Mechanical, cause unspecified, complete | K56.692 |
| Postprocedural complication, unspecified | K91.30 |
| Postprocedural, partial | K91.31 |
| Postprocedural, complete | K91.32 |
| No further specification available | K56.7 — acceptable final |
Context Codes Frequently Accompanying K56.7
| Code | Description | Why Paired |
|---|---|---|
| K65.x | Peritonitis | Inflammatory cause — FY2024 dual coding permitted |
| E87.6 | Hypokalemia | Metabolic cause |
| A41.x | Sepsis | Systemic cause |
| K85.x | Pancreatitis | Adjacent inflammatory cause |
| F11.x | Opioid use disorder | Drug-induced dysmotility |
⚠️ Coding Pitfalls and Tips
| Pitfall or Tip | |
|---|---|
| ❌ | Never use K56.7 when the type is documented — paralytic → K56.0; mechanical → K56.1-K56.69- |
| ❌ | Never code K56.7 AND K56.0 together — they are Excludes1; mutually exclusive |
| ❌ | Never default to K56.7 for “post-op ileus” — check K56 Excludes1 for postprocedural obstruction (K91.3-) first |
| ❌ | Never skip the CDI query — K56.7 without a query attempt is a coding deficiency; always attempt to resolve to a specific code |
| ✅ | K56.7 = interim code + query trigger — acceptable temporarily; goal is always resolution to a specific code |
| ✅ | K56.7 is acceptable as final code after a CDI query yields no additional specificity from the physician |
| ✅ | FY2024 update applies — K56.7 can be coded alongside underlying cause (peritonitis, hypokalemia, sepsis) effective October 1, 2023 |
| ✅ | See K56.0 for the master K56 reference — full etiology table, FY2024 update detail, K56.0 vs. K91.3- distinction, DRG impact, full coding scenarios |
📚 Sources
1. AAPC Codify. “K56.7 — Ileus, unspecified. K56 Excludes1: postprocedural intestinal obstruction (K91.3-).” K56 full tabular structure confirmed. [web:327]
2. Unbound Medicine ICD-10-CM. “K56.7 — Ileus, unspecified. [Billable]. FY2026 edition.” [web:328]
3. ICDList.com. “K56.7 — Billable, valid for submission FY2025. Not chronic. Unspecified diagnosis codes acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient’s condition.” [web:330]
4. Medentic. “K56.7 — Ileus, unspecified. Classified under K56 Paralytic ileus and intestinal obstruction without hernia.” [web:329]
5. MD Clarity. “K56.7 — unspecified ileus — a blockage of the intestine without a specific cause identified.” [web:333]
6. HIA Code. “FY2024 Coding Clinic update — Excludes1 note removed effective October 1, 2023; the 2017 Coding Clinic advice no longer valid; coder may now code bowel obstruction when documented alongside underlying cause.” Applies equally to K56.7. [web:325]
7. ICD-10-CM Official Guidelines for Coding and Reporting FY2025. Section I.B — Unspecified codes: “Unspecified codes are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient’s condition.”