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CurrentCurativePolicy CHP-IP-2026-107

Colectomy / Bowel Resection

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This policy governs inpatient admission, level-of-care assignment, continued stay, and discharge for open, laparoscopic, or robotic resection of the colon, rectum, or small bowel, with or without ostomy creation, for Curative commercial PPO and EPO plans. It applies to adults age 18 and older; pediatric bowel resection is reviewed by pediatric surgery.

Policy Summary

PayerCurative

PolicyColectomy / Bowel Resection

Policy CodePolicy CHP-IP-2026-107

Change TypeAdministrative version updateno material clinical or coverage changes

Effective DateN/A

Next Review DateN/A

Key ActionDocument the diagnosis, surgical indication, objective supporting findings, and why inpatient care is required.

SourceLink

POLICY UPDATE CHANGES

Version 5.4.2 supersedes Version 5.4.1, approved November 2, 2026, and is unchanged between versions.

Adults 18+Applicable population

2-4 daysTypical minimally invasive stay

4-7 daysTypical open or emergency stay

1.5 L/dayHigh-output ostomy threshold

24 hoursConcurrent review interval

2 daysPhysician review benchmark

Inpatient Coverage and Level-of-Care Criteria

Inpatient admission

Covered when ALL of the following are met.

Procedure indication
- Qualifying indications
  - Colon or rectal cancer, or an endoscopically unresectable adenoma or high-grade dysplasia for which resection is recommended by the multidisciplinary team.
  - Diverticulitis with diffuse purulent or fecal peritonitis (Hinchey III or IV), abscess failing percutaneous drainage and antibiotics, fistula, stricture, or obstruction; or elective resection after complicated diverticulitis selected by shared decision-making.
  - Large or small bowel obstruction from tumor, stricture, volvulus, or adhesions with ischemia or failure of non-operative management.

Policy Summary

PayerCurative

PolicyColectomy / Bowel Resection

Policy CodePolicy CHP-IP-2026-107

Change TypeAdministrative version updateno material clinical or coverage changes

Effective DateN/A

Next Review DateN/A

Key ActionDocument the diagnosis, surgical indication, objective supporting findings, and why inpatient care is required.

SourceLink

On This Page

Acute mesenteric ischemia, perforation, or lower gastrointestinal bleeding not controlled by endoscopic or angiographic therapy.

Ulcerative colitis refractory to medical therapy, acute severe colitis failing IV corticosteroids and rescue therapy, toxic megacolon, perforation, or dysplasia not amenable to endoscopic resection.

Crohn's disease with stricture causing obstruction, fistula, abscess, or disease refractory to medical therapy.

Inpatient setting required

Any open, laparoscopic, or robotic bowel resection with anastomosis or ostomy requiring postoperative monitoring for ileus, leak, and bleeding.
Applies to all major bowel resections.
Emergency or urgent indication, including peritonitis, obstruction, ischemia, or bleeding.
ASA physical status III or higher or elevated predicted risk on the ACS NSQIP calculator.

Observation or outpatient instead of inpatient

The following related services are outpatient or observation services and do not justify inpatient admission by themselves.

Outpatient or observation services

Diagnostic colonoscopy, endoscopic polypectomy or endoscopic submucosal dissection with an uncomplicated course, and staging imaging.
Uncomplicated diverticulitis managed with oral or no antibiotics.
Preoperative bowel preparation that can be completed at home.
Inpatient care may be appropriate when the member cannot tolerate preparation at home or has a medical reason such as obstruction risk or need for IV hydration.

Intensive care unit

ICU care is appropriate when ANY of the following is present.

ICU level of care

Septic shock from perforation, anastomotic leak, or ischemia requiring vasopressors.
Mechanical ventilation.
Planned second-look laparotomy with open abdomen.
Hemorrhage requiring massive transfusion.

Step-down or intermediate care

Step-down care is appropriate when ANY of the following is present and no ICU criterion is met.

New atrial fibrillation with rapid ventricular response requiring IV rate control.
Epidural analgesia with hypotension.
Sepsis that has responded to fluids without vasopressors.
High-output ostomy above 1.5 L per day with electrolyte derangement requiring IV correction and telemetry.

Medical-surgical unit

Medical-surgical care is appropriate when ANY of the following applies and no higher-level criterion is met.

Enhanced-recovery pathway with diet advancement, mobilization, and oral analgesia.
Ostomy teaching and wound care.

Discharge readiness

Discharge is appropriate when ALL of the following are met.

Hemodynamically stable without IV vasoactive medication for at least 24 hours.
Temperature below 38.0 C for at least 24 hours or a documented non-infectious explanation.
Pain controlled on an oral or other regimen that can be continued after discharge.
Oral intake tolerated, or a stable enteral or parenteral nutrition plan can be delivered at the next level of care.
Wounds, drains, and tubes are stable, with a documented management plan the patient, caregiver, or home-health agency can carry out.
Mobility is at the expected post-procedure level or a safe plan exists at the receiving level of care.
Laboratory values are stable or improving, with no result requiring inpatient intervention.
Venous thromboembolism prophylaxis plan, medication reconciliation, surgeon follow-up date, and return precautions are documented.
Diet is tolerated without nausea or vomiting, with return of bowel function through flatus, stool, or ostomy output.
Ostomy self-care is demonstrated by the member or caregiver, or home-health ostomy nursing is arranged; ostomy output is below 1.5 L per day or a hydration plan exists.
There are no clinical signs of anastomotic leak.
Clinical signs include fever, tachycardia above 110 beats per minute, rising C-reactive protein, or worsening abdominal pain.

Continued-stay criteria

Continued inpatient stay is medically necessary when reviewed at least every 24 hours and ANY of the following is documented.

Hemodynamic, respiratory, or neurologic instability remains unresolved, including any ICU or step-down criterion that is still present.
A postoperative complication is under active inpatient treatment, including bleeding requiring transfusion or return to the operating room, surgical-site infection requiring IV antibiotics or drainage, venous thromboembolism requiring initiation of therapeutic anticoagulation with monitoring, acute kidney injury with rising creatinine, or ileus requiring nasogastric decompression.
IV therapy cannot be given at a lower level of care, such as IV antibiotics not yet transitioned, parenteral nutrition being initiated, or IV analgesia not yet converted.
An urgent procedure or re-intervention is scheduled within 24 hours.
Postoperative ileus persists beyond postoperative day 4 with intolerance of oral intake.
Anastomotic leak, abscess, or bleeding is under active management.

Extended-stay review

Extended-stay days beyond the benchmark require documentation of the trigger, objective evidence, and targeted plan.

Extended-stay triggers

Anastomotic leak requiring imaging, drainage, or reoperation.
Postoperative ileus beyond day 5 requiring nasogastric decompression or parenteral nutrition.
Surgical-site infection or dehiscence.
High-output ostomy with dehydration.
Hemorrhage requiring transfusion or reoperation.
Clostridioides difficile infection.

Outpatient or observation services do not independently support inpatient admission. These include diagnostic colonoscopy; uncomplicated endoscopic polypectomy or endoscopic submucosal dissection; staging imaging; uncomplicated diverticulitis managed with oral or no antibiotics; and preoperative bowel preparation that can be completed at home.

Preoperative inpatient admission solely for bowel preparation is not supported when the member can complete preparation at home because it represents the wrong site of care. Inpatient preparation may be considered when the member cannot tolerate it at home or has a medical reason, such as obstruction risk or a need for IV hydration.

Preoperative admission more than one day before surgery is not supported when it is for scheduling, transportation, or routine testing that can be completed as an outpatient. Admission should generally occur on the day of surgery unless documented medical optimization requires inpatient preparation, such as IV heparin bridging, IV hydration, or bowel preparation that cannot be tolerated at home.

A continued postoperative stay solely while awaiting skilled nursing, inpatient rehabilitation, or long-term acute care placement after the member is medically ready is not an acute inpatient need. The case should be routed for physician review and case management; already-authorized days are not retroactively denied.

Elective testing or consultation that could be completed in the outpatient setting and does not change acute management does not support added inpatient days. Such days are considered convenience-based or duplicative rather than medically necessary.

Elective colectomy after a single episode of uncomplicated diverticulitis is not medically necessary as routine practice when documentation does not show shared decision-making about ongoing risk. Elective resection after complicated diverticulitis should be individualized through shared decision-making rather than applied routinely. Requests in this circumstance require physician review.

A continued postoperative stay is not supported when all discharge-readiness criteria are met and no acute need remains. Discharge readiness includes stable vital signs, controlled pain, tolerated intake or an appropriate nutrition plan, stable wounds and tubes with a management plan, safe mobility, stable or improving laboratory values, documented follow-up and return precautions, return of bowel function, and no clinical signs of anastomotic leak. Cases without a remaining acute need are referred for physician review and discharge planning.

Diagnosis, Procedure, and Utilization Coding

ICD-10-CM colorectal malignancyICD-10

C18.0	colorectal malignancy
C18.1	colorectal malignancy
C18.2	colorectal malignancy
C18.3	colorectal malignancy
C18.4	colorectal malignancy
C18.5	colorectal malignancy
C18.6	colorectal malignancy
C18.7	colorectal malignancy
C18.8	colorectal malignancy
C18.9	colorectal malignancy

1–10 of 12

1/2

ICD-10-CM diverticulitis, perforation, ischemia, obstruction, and inflammatory bowel diseaseICD-10

K57.20	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K57.21	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K63.1	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K55.011	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K55.012	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K55.019	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K55.021	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K55.022	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K55.029	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease
K55.031	diverticulitis, perforation, ischemia, obstruction, or inflammatory bowel disease

1–10 of 80

1/8

ICD-10-CM colorectal malignancyICD-10

C18.0	colorectal malignancy
C18.1	colorectal malignancy
C18.2	colorectal malignancy
C18.3	colorectal malignancy
C18.4	colorectal malignancy
C18.5	colorectal malignancy
C18.6	colorectal malignancy
C18.7	colorectal malignancy
C18.8	colorectal malignancy
C18.9	colorectal malignancy

1–10 of 12

1/2

ICD-10-CM diverticulitis, perforation, ischemia, obstruction, inflammatory bowel diseaseICD-10

K57.20	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K57.21	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K63.1	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K55.011	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K55.012	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K55.019	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K55.021	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K55.022	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K55.029	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease
K55.031	diverticulitis, perforation, ischemia, obstruction, inflammatory bowel disease

1–10 of 107

1/11

ICD-10-PCSICD-10

0DTE0ZZ	colectomy / bowel resection
0DTH0ZZ	colectomy / bowel resection
0DTN0ZZ	colectomy / bowel resection
0DBE0ZZ	colectomy / bowel resection
0D1E0Z4	colectomy / bowel resection

Open colectomy CPT codesCPT

44140	open colectomy
44141	open colectomy
44143	open colectomy
44144	open colectomy
44145	open colectomy
44146	open colectomy
44147	open colectomy
44150	open colectomy
44151	open colectomy
44155	open colectomy

1–10 of 19

1/2

Laparoscopic colectomy CPT codesCPT

44204	laparoscopic colectomy
44205	laparoscopic colectomy
44206	laparoscopic colectomy
44207	laparoscopic colectomy
44208	laparoscopic colectomy
44210	laparoscopic colectomy
44211	laparoscopic colectomy
44212	laparoscopic colectomy
44213	laparoscopic colectomy

MS-DRG (FY2027 v44)mixed

329	MS-DRG FY2027 v44
330	MS-DRG FY2027 v44
331	MS-DRG FY2027 v44

Revenue codes (facility)Revenue

0110	room and board
0111	room and board
0112	room and board
0113	room and board
0114	room and board
0115	room and board
0116	room and board
0117	room and board
0118	room and board
0119	room and board

1–10 of 35

1/4

High-output ostomy

ThresholdOstomy output above 1.5 L per day

Required findingsElectrolyte derangement requiring IV correction and telemetry

Level of careStep-down or intermediate care is appropriate when no ICU criterion is met

Ostomy output for discharge

Output thresholdOstomy output below 1.5 L per day

AlternativeA documented hydration plan may support discharge when output is not below 1.5 L per day

Additional readinessOstomy self-care must be demonstrated by the member or caregiver, or home-health ostomy nursing must be arranged

Hemodynamic stability

Stability requirementThe member must be hemodynamically stable

IV medication thresholdWithout IV vasoactive medication for at least 24 hours

ApplicationThis is a discharge-readiness criterion for acute inpatient care

Temperature for discharge

Temperature thresholdBelow 38.0 C

DurationTemperature must remain below 38.0 C for at least 24 hours

AlternativeA documented non-infectious explanation may satisfy the criterion

Tachycardia concerning for anastomotic leak

Heart-rate thresholdAbove 110 beats per minute

Clinical concernTachycardia above 110 beats per minute is a clinical sign concerning for anastomotic leak

Required responseEvaluate for anastomotic leak with CT; drainage or reoperation may be required

Postoperative ileus extended-stay trigger

Timing thresholdPostoperative ileus persisting beyond day 5

Required interventionNasogastric decompression or parenteral nutrition

Extended-stay documentationDocument the trigger, objective evidence, and targeted plan

Expected stay for minimally invasive colectomy

Typical durationAbout 2 to 4 days

Applicable procedureUncomplicated laparoscopic or robotic colectomy

Care pathwayThe expectation reflects an enhanced-recovery pathway

FY2027 v44 GMLOS for MS-DRG 331

Benchmark2.6 days

Applicable classificationCMS FY2027 MS-DRG v44, MS-DRG 331 without CC/MCC

Use of benchmarkA Medicare-population planning benchmark, not a limit on covered days

Documentation and Review Requirements

Documentation Required

Diagnosis and Objective Indication

Document the diagnosis, surgical indication, and objective findings supporting the procedure, including imaging, pathology, physiologic testing, or relevant scores.

Diagnosis and indication
Objective supporting findings

Documentation Required

Procedure and Urgency

Document the planned procedure, surgical approach, and urgency so the requested service and timing are clear.

Procedure
Approach: open, laparoscopic, robotic, or endovascular
Urgency: elective, urgent, or emergent

Documentation Required

Preoperative Risk Assessment

Include the preoperative risk assessment, including ASA physical status, relevant comorbidities, and procedure-specific risk-calculator results when used.

ASA physical status class
Relevant comorbidities
Applicable procedure-specific risk-calculator results

Documentation Required

Inpatient-Setting Rationale

Explain why inpatient care is required and identify the anticipated monitoring needs, comorbidity-related risks, procedure-related needs, or potential complications that support the setting.

Expected monitoring needs
Comorbidity risk
Procedure type
Anticipated complications

Documentation Required

Daily Concurrent Documentation

Provide daily concurrent documentation of the patient’s clinical status, treatment, and complications throughout the stay.

Vital signs
Drains and tubes, including outputs
Pain control
Diet and mobility
Laboratory values
Complications

Documentation Required

Level-of-Care Justification

Document the assigned level of care and the objective clinical reason supporting each ICU or step-down day.

Level-of-care assignment
Objective justification for every ICU day
Objective justification for every step-down day

Documentation Required

Discharge Planning

Document discharge readiness, destination, and follow-up planning. Include VTE prophylaxis, medication reconciliation, and surgeon follow-up.

Discharge-readiness assessment
Discharge destination
VTE prophylaxis plan
Medication reconciliation
Follow-up plan and surgeon follow-up

Documentation Required

Disease-Specific Records

Submit disease-specific records when applicable to establish the indication and severity of disease.

For neoplasm: pathology, colonoscopy, and staging imaging
For diverticulitis: CT findings and Hinchey stage
For other indications: relevant objective diagnostic records

Documentation Required

Inflammatory Bowel Disease Treatment History

For inflammatory bowel disease, document the medical therapies tried and the patient’s response to each therapy.

Prior medical therapies
Treatment response

Documentation Required

Enhanced Recovery and Bowel-Function Tracking

Document enhanced-recovery pathway elements used and track bowel function throughout the stay, including daily diet and ostomy status.

Enhanced-recovery pathway elements used
Daily bowel function
Daily diet
Daily ostomy output

Billing Rule

Support the Requested Extent of Service

Documentation must support the requested quantity, units, and duration. When the request exceeds the supported amount, identify the supported portion and the unsupported increment separately.

Requested quantity
Requested units
Requested duration
Approve the supported portion; review only the excess increment

Denial Risk

Scenarios Requiring Physician Review

The following scenarios do not meet the policy’s medical-necessity criteria and must be referred for physician review rather than denied by an automated system or non-physician reviewer.

Elective colectomy after a single episode of uncomplicated diverticulitis without shared-decision-making documentation of ongoing risk; not routine medical necessity under the ASCRS guideline.
Preoperative inpatient admission solely for bowel preparation when the member can complete it at home; wrong site of care.
Preoperative admission more than one day before surgery for non-medical reasons such as scheduling, transportation, or routine outpatient testing. Admit on the day of surgery unless documented medical optimization requires inpatient preparation, such as IV heparin bridging, IV hydration, or bowel preparation that cannot be tolerated at home.
Continued postoperative stay after all discharge-readiness criteria are met; no remaining acute need, requiring physician review and discharge planning.
Continued stay solely while awaiting skilled nursing, inpatient rehabilitation, or long-term acute-care placement after medical readiness is established; route to physician review and case management, and do not retroactively deny already-authorized days.
Days added only for elective testing or consultation that could be completed as an outpatient; this is convenience or duplicative care without a change in acute management.

Denial Risk

Postoperative Safety Red Flags

These postoperative findings require prompt clinical evaluation and may change the review pathway or make discharge unsafe.

Fever, tachycardia above 110 beats per minute, worsening abdominal pain, or rising C-reactive protein on postoperative days 3–5: evaluate for anastomotic leak with CT; drainage or reoperation may be required.
Bloody ostomy output or rectal bleeding with falling hemoglobin: evaluate for anastomotic bleeding; transfusion and endoscopic or surgical control may be required.
Vomiting and distension after diet begins: evaluate for ileus or obstruction; use nasogastric decompression as needed.
Dusky or retracted stoma: obtain urgent surgical evaluation for stoma ischemia.
Ostomy output above 1.5 L per day with rising creatinine: provide IV fluids and antimotility therapy; discharge is unsafe until output is controlled.

Billing Rule

Physician Review Required for Adverse Determinations

Automated systems and non-physician clinical reviewers may approve a request in full or in part but may not issue an adverse determination. A request that does not meet criteria must be referred to a licensed physician of the same or similar specialty, with an opportunity for peer-to-peer discussion before an adverse determination.

The reviewing physician must meet applicable licensure, specialty, and medical-director requirements for the plan’s situs state.
The absence of a criterion addressing a service is not, by itself, a basis for an adverse determination; a physician must apply generally accepted standards of medical practice.
Concurrent review applies to each continued-stay period. Days already authorized are not retroactively denied, and expected length of stay is a planning benchmark, not a limit on covered days.
The Medicare two-midnight benchmark is not a coverage criterion for these commercial plans. A procedure need not be on the CMS inpatient-only list; inclusion on that list supports approval of inpatient status.
Coverage remains subject to the member’s benefit plan and applicable federal and state law, including MHPAEA and 42 CFR Part 2 when applicable.

Billing Rule

Unsupported Quantity or Duration

When criteria support the service but the requested quantity, units, or duration exceed the documentation, approve the supported portion and route only the unsupported increment for review.

Do not deny the entire request solely because the requested extent exceeds the documented support.
Apply concurrent review to each continued-stay period.
Do not retroactively deny days that were already authorized.

Clinical Background

Bowel resection may be performed for colorectal cancer, complicated diverticulitis, bowel obstruction, ischemia, perforation, bleeding, or inflammatory bowel disease that is refractory to medical therapy. Inpatient need depends on both the surgical indication and the need for hospital-level monitoring, including monitoring for ileus, anastomotic leak, or bleeding after major resection. Enhanced-recovery care supports multimodal, opioid-sparing analgesia, early feeding, and early mobilization; an uncomplicated minimally invasive colectomy typically requires about 2 to 4 days of hospitalization.

Related Clinical Definitions

Enhanced recovery pathway

DefinitionA standardized perioperative protocol

Core elementsPre-operative counseling, carbohydrate loading, opioid-sparing analgesia, early diet, and mobilization

Expected benefitShown to shorten hospital stay without increasing complications

Hinchey classification

DefinitionA staging system for perforated diverticulitis

Stages I and III: pericolic abscess; II: distant abscess

Stages III and IVIII: purulent peritonitis; IV: fecal peritonitis