Summary & Overview

CPT 45327: Proctosigmoidoscopic Placement of Colorectal Stent

CPT code 45327 captures a therapeutic proctosigmoidoscopy with placement of a stent to treat a stricture of the anus, rectum, or sigmoid colon. This endoscopic intervention is an important minimally invasive option for palliation of obstructing lesions or benign strictures, and it has implications for procedure utilization, site-of-service planning, and device-related reimbursement nationally. The code is used across ambulatory surgical centers, hospital outpatient departments, and endoscopy suites.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for stent placement via proctosigmoidoscopy, typical sites of service, and the scope of services captured by 45327. The publication presents benchmarks and utilization context, highlights payer coverage considerations, and notes relevant policy developments affecting endoscopic therapeutic procedures. The content aims to inform billing and coding teams, revenue cycle managers, and clinical leaders about where 45327 fits in workflows and billing practice.

Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, related codes, and payer-specific reimbursement rates.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare45327CPTproctosigmoidoscopycolorectal-stentendoscopyoutpatient-surgerygastroenterologyprocedural-coding

Billing Code Overview

CPT code 45327 describes a proctosigmoidoscopic procedure in which a provider uses a short rigid proctosigmoidoscope with a camera to inspect the anus, rectum, and sigmoid colon and then introduces and places a stent through the instrument's channel to relieve a stricture (abnormal narrowing).

Service type: Endoscopic therapeutic procedure (stent placement for colorectal/anal stricture)
Typical site of service: Ambulatory surgery center or hospital outpatient department; may also be performed in an endoscopy suite

Clinical & Coding Specifications

Clinical Context

A 68-year-old patient with a history of diverticular disease and progressive obstructive symptoms presents with intermittent abdominal cramping, constipation, and rectal bleeding. Flexible evaluation with anoscopy and proctoscopy demonstrates a short-segment malignant or benign stricture of the distal sigmoid colon/rectum causing partial obstruction. The gastroenterologist or colorectal surgeon performs a rigid proctosigmoidoscopy using a proctosigmoidoscope to visualize the anus, rectum, and sigmoid colon, then introduces and deploys a self-expanding or balloon-mounted stent through the scope channel to palliate or relieve the stricture.

The clinical workflow includes pre-procedure consent and assessment, bowel preparation as indicated, procedural sedation or monitored anesthesia care in an endoscopy suite or operating room, sterile setup with proctosigmoidoscope and stent delivery system, endoscopic visualization and measurement of the stricture, stent placement under direct vision and fluoroscopic confirmation when indicated, post-deployment assessment of luminal patency and hemostasis, recovery monitoring, and discharge with follow-up instructions for symptom monitoring and possible stent surveillance or definitive surgical planning.

Coding Specifications

Modifier	Description	When to Use
`11`	Primary procedure	When this stent placement is the principal service on the claim.
`22`	Increased procedural services	For unusual procedural complexity (extensive adhesiolysis or repair) increasing work beyond typical.
`23`	Unusual anesthesia	When procedure performed under general anesthesia because local/regional not possible.
`52`	Reduced services	If the procedure is partially reduced or aborted after starting.
`53`	Discontinued procedure	If terminated due to patient instability before stent deployment.
`62`	Two surgeons	When two surgeons with distinct skills perform portions of the procedure together.
`66`	Surgical team	When multiple qualified surgeons participate as a team for complex cases.
`73`	Discontinued outpatient hospital/ASC prior to anesthesia	If cancelled after sedation plan but before anesthesia administered.
`78`	Unplanned return to OR following initial procedure	For reoperation related to complications of the stent placement during the postoperative period.
`80`	Assistant surgeon	When an assistant surgeon is required and documented.
`81`	Minimum assistant surgeon	When a minimal assistant role is documented.
`82`	Assistant surgeon (qualified resident)	When a qualified resident performs assistant duties and billing requires this modifier.
`TC`	Technical component	When billing only for the technical component of imaging or equipment rental associated with the procedure.
`QK`	Medical direction of 2–4 CRNAs	When the physician medically directs multiple CRNAs for anesthesia services.

Taxonomy Code	Specialty	Notes
272100000X	Colorectal Surgery	Common surgical specialty performing endoscopic stent placement for rectal/sigmoid strictures.
207L00000X	Gastroenterology	Frequently places stents endoscopically for malignant or benign colonic strictures.
208000000X	General Surgery	Performs stent placement in operative or endoscopy suite settings.
208800000X	Surgical Critical Care	Involved for high-risk patients requiring intensive perioperative management.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K62.5`	Hemorrhage of anus and rectum	May prompt evaluation that identifies a stricture requiring stent for palliation of obstructive bleeding-related lesions.
`K62.6`	Rectal spasm	Can be associated with obstructive symptoms and may be assessed during proctosigmoidoscopy.
`K56.69`	Other intestinal obstruction	Clinical presentation that can be caused by distal colonic strictures amenable to stent placement.
`K50.919`	Crohn's disease of unspecified site, without complications	Crohn's-related strictures in distal colon/rectum may be treated with endoscopic stenting in select cases.
`K57.30`	Diverticulosis of large intestine without perforation or abscess	Diverticular disease can lead to scarring/stricture prompting stent placement for obstruction.
`C18.9`	Malignant neoplasm of colon, unspecified	Malignant colonic tumors commonly cause strictures requiring palliation with colonic stent placement.
`C20`	Malignant neoplasm of rectum	Rectal cancers often present with obstructing lesions for which stent deployment is indicated.
`K21.9`	Gastro-esophageal reflux disease without esophagitis	Not directly related to sigmoid stent but included for differential endoscopic evaluations — clinical relevance minimal.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`45326`	Proctosigmoidoscopy, rigid; diagnostic, with or without collection of specimen by brushing or washing	Often performed immediately prior to stent placement as the diagnostic/visualization step.
`45330`	Proctosigmoidoscopy, rigid; requiring dilation of stricture	May be performed if dilation is attempted instead of or prior to stent placement.
`G0105`	Colorectal cancer screening; flexible sigmoidoscopy in individual at high risk	Screening code not directly for stent placement but represents related endoscopic evaluation workflows (listed for contextual relevance).
`43246`	Upper GI endoscopic stent placement, esophageal (self-expanding)	Different anatomic site but similar technique and coding principles for endoscopic stent deployment; useful for cross-discipline coding reference.
`76000`	Fluoroscopy, general; first image — guidance/monitoring during procedure	Fluoroscopic imaging frequently accompanies stent deployment for positioning confirmation.