Summary & Overview

CPT 45397: Laparoscopic Proctocolectomy with Coloanal Anastomosis and Colonic Pouch

CPT code 45397 describes a laparoscopic proctocolectomy with coloanal anastomosis and creation of a colonic pouch, frequently performed with a temporary ileostomy to protect the anastomosis. This complex reconstructive colorectal operation is a high-acuity inpatient surgical procedure with implications for surgical quality, postoperative care, and payer authorization policies across the United States. Nationally, this code matters because it captures resource-intensive care, affects bundled payment and DRG assignment, and influences quality measurement for colorectal surgery.

Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical service and typical sites of care, common payer coverage considerations, and the set of commonly reported modifiers. The publication summarizes benchmarks used by payers for surgical utilization and length-of-stay expectations, highlights coding scenarios that commonly trigger prior authorization or review, and situates the code within colorectal surgical care pathways. Clinical context is provided to clarify why temporary diversion (ileostomy) is sometimes performed alongside the anastomosis. Data not available in the input is noted explicitly where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare45397CPTcolorectal-surgeryproctocolectomycoloanal-anastomosiscolonic-pouchlaparoscopic-surgeryinpatient-surgery

Billing Code Overview

CPT code 45397 describes a laparoscopic proctocolectomy with coloanal anastomosis and creation of a colonic pouch, often accompanied by a temporary small bowel stoma (ileostomy) to divert fecal flow while the anastomosis heals. This procedure involves removal of the entire rectum, mobilization of the colon, construction of a reservoir from the colon, and reattachment of the colon to the anal canal using minimally invasive laparoscopic techniques.

Service type: Major laparoscopic colorectal surgery with reconstructive anastomosis and possible temporary stoma formation
Typical site of service: Inpatient hospital operating room with postoperative inpatient recovery and monitoring

Clinical & Coding Specifications

Clinical Context

A typical patient is a 45–65-year-old adult with refractory ulcerative colitis, familial adenomatous polyposis, or low rectal cancer requiring proctocolectomy with restorative ileoanal-pouch formation. The patient presents after failing medical therapy or following a surgical oncology decision for oncologic resection. Preoperative workup includes colonoscopy, cross-sectional imaging, and routine labs. The operation is performed in an operating room under general anesthesia using laparoscopic techniques. The surgeon mobilizes and removes the entire rectum (proctectomy), constructs a colonic reservoir (colonic J-pouch or similar), performs a coloanal anastomosis, and may create a temporary diverting ileostomy to protect the anastomosis.

Perioperative workflow: preoperative consent and marking, anesthesia induction, prophylactic antibiotics, laparoscopic abdominal access, mesenteric vessel division and rectal mobilization, pouch construction and transanal anastomosis, leak test, possible creation of a loop ileostomy through a separate abdominal incision, closure of laparoscopic port sites, postoperative recovery in PACU and inpatient monitoring for bowel function, stoma care education if an ileostomy is created, and planned outpatient follow-up with possible staged ileostomy closure in 8–12 weeks if applicable.

Coding Specifications

Modifier	Description	When to Use
`00`	Default or unspecified modifier	Use only if payer requires a placeholder modifier; rarely reported clinically.

Taxonomy Code	Specialty	Notes
207L00000X	Colon & Rectal Surgery	Colon and rectal surgeons commonly perform restorative proctocolectomy and pouch procedures.

ICD-10 Code	Description	Clinical Relevance
`K51.9`	Ulcerative colitis, unspecified	Common indication for restorative proctocolectomy with ileoanal or colonic pouch for medically refractory disease.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`44204`	Laparoscopy, surgical; colectomy, partial, with anastomosis	May be performed when segmental colectomy is required in addition to pouch creation or for proximal disease management.

| 44140 | Colectomy, partial; with anastomosis, for benign or malignant disease, open procedure | An open alternative when laparoscopy is not feasible; may be billed instead of or in combination depending on approach.

| 44625 | Partial proctectomy with anastomosis (coloanal) | Related pelvic dissection/anastomotic technique codes when proctectomy components are reported separately.

| 44180 | Colectomy, total, abdominal, without proctectomy; with ileostomy or ileoproctostomy | May be performed in staged management where total colectomy precedes restorative pouch creation.

| 44187 | Colectomy, total, with proctectomy, with ileostomy | Codes for total proctocolectomy with stoma creation when pouch reconstruction is not performed during the same operation.

| 44227 | Laparoscopy, surgical; colectomy, total, abdominal, combined with proctectomy | Laparoscopic total proctocolectomy codes that may be used for variant approaches to rectal removal and pouch formation.

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