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. |
| 11 | Normal, additional procedure performed | Use when this code represents the primary service and no unusual circumstances are present.
| 22 | Increased procedural services | Use when work or time is substantially greater than typical for 45397 (e.g., extensive adhesiolysis, atypical anatomy).
| 23 | Unusual anesthesia | Use when general anesthesia converted to major anesthesia due to emergency or patient condition affecting anesthesia complexity.
| 50 | Bilateral procedure | Generally not applicable for 45397 but used when a payer requires bilateral indicator reporting for related bilateral services.
| 51 | Multiple procedures | Use when 45397 is billed with additional distinct procedures during the same operative session.
| 52 | Reduced services | Use when the full procedure is partially performed or aborted for documented reasons.
| 53 | Discontinued procedure | Use when the procedure is started but discontinued due to extenuating circumstances.
| 54 | Surgical care only | Use when another provider bills pre- or postoperative care separately and the surgeon bills only intraoperative surgical services.
| 56 | Preoperative management only | Use when the reporting surgeon provides only the preoperative evaluation and another surgeon performs the operation.
| 58 | Staged or related procedure by the same physician | Use when 45397 is part of a planned staged approach (e.g., initial pouch creation with later ileostomy reversal).
| 62 | Two surgeons | Use when two surgeons with different NPI collaboratively perform portions of the operation and both bill.
| 63 | Procedure performed on infants (<4 kg) | Rarely applicable; included for completeness when patient weight criteria met.
| 78 | Unplanned return to OR following initial procedure | Use when patient returns to the OR for a related procedure under the same or different anesthesia following 45397.
| Taxonomy Code | Specialty | Notes |
|---|
| 207L00000X | Colon & Rectal Surgery | Colon and rectal surgeons commonly perform restorative proctocolectomy and pouch procedures. |
| 207K00000X | General Surgery | General surgeons with colorectal focus perform laparoscopic proctectomy and pouch construction.
| 208000000X | Obstetrics & Gynecology | Gynecologic oncologists may be involved when pelvic disease necessitates multi-disciplinary resection (collaborative cases).
| 207RH0000X | Surgical Oncology | Surgical oncologists participate for oncologic indications such as rectal cancer requiring proctectomy.
Related Diagnoses
| 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. |
| K62.5 | Anal stenosis | May be an indication for rectal resection and reconstruction in select cases.
| C20 | Malignant neoplasm of rectum | Rectal cancer requiring oncologic resection with proctectomy and possible pouch reconstruction.
| K50.9 | Crohn's disease, unspecified | Selected cases with refractory rectal disease may require proctectomy, though Crohn's is a relative contraindication to pouch creation.
| Q14.2 | Congenital malformation of anus and rectum | In complex congenital conditions, definitive reconstructive procedures may include rectal resection and pouching.
| K59.1 | Functional intestinal obstruction | Severe refractory colonic dysfunction leading to proctocolectomy and creation of a pouch in selected cases.
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.