Summary & Overview
CPT 44799: Unlisted Intestinal Procedure
CPT code 44799 designates unlisted procedures on the intestine and is used when an intestinal intervention lacks a specific CPT descriptor. Nationally, unlisted codes like 44799 matter because they allow billing for novel, rare, or evolving surgical techniques that fall outside standard code sets, ensuring services can be reported while documentation and coding guidance catch up. Payers commonly evaluated in relation to this code include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
This publication provides a concise national overview of CPT code 44799, covering clinical context, typical sites of service (hospital operating room, ambulatory surgical center, and other procedural settings), and the operational implications of using an unlisted intestinal procedure code. Readers will find benchmarks and practical coding considerations, a summary of payer handling practices, and recent policy developments affecting unlisted procedural reporting. The report also outlines documentation and billing elements that influence claim adjudication for unlisted intestinal procedures and highlights where readers can expect variability across payers.
Billing Code Overview
CPT code 44799 is an unlisted procedure code for the intestine used to report new or unusual intestinal procedures that do not have an assigned CPT code. This code applies when a clinician performs an intestinal procedure that is not described by existing CPT codes.
Service type: Surgical or procedural services on the intestine
Typical site of service: Hospital operating room, ambulatory surgical center, or other procedural setting where intestinal surgery is performed
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Clinical & Coding Specifications
Clinical Context
A typical patient is a 58-year-old male presenting with persistent small-bowel obstruction symptoms after previous abdominal surgery. Diagnostic imaging (CT scan) identifies an unusual stricture of the jejunum not amenable to standard resection techniques. The surgical team plans an intraoperative novel intestinal reconstruction using a tailored serosal patch and nonstandard anastomosis technique not described by an existing CPT code. The case is scheduled in an inpatient operating room under general anesthesia with preoperative consent noting potential use of an unlisted procedure code. The clinical workflow includes preoperative evaluation by the attending colorectal surgeon, anesthesia assessment, intraoperative documentation of the unique steps performed (indication, anatomy encountered, specific technique, time, and personnel), use of 44799 for billing with a detailed operative report justifying the unlisted procedure, and submission of supporting documentation (operative note, pathology if applicable, and anesthesia record) to the payer for review. Postoperative care includes routine inpatient monitoring, nutrition planning, and follow-up visits documenting outcomes and any additional procedures.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when work required is substantially greater than typical for an intestinal procedure and documented in the operative report. |