Summary & Overview
CPT 43634: Partial Gastrectomy With Intestinal Pouch Reconstruction
CPT code 43634 represents a partial gastrectomy with creation of an intestinal pouch — a major abdominal operation used to remove diseased distal stomach tissue and reconstruct gastrointestinal continuity. Nationally, this code captures significant surgical complexity, inpatient resource use, and postoperative care needs, making it relevant for hospital billing, surgical quality measurement, and payer authorization policies.
Key payers addressed in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find clinical context for when this operation is performed, typical sites of service, and how the code is used in claims. The report summarizes common modifiers and coding considerations, presents national billing benchmarks and utilization patterns where available, and outlines recent policy or coverage updates that affect preauthorization and inpatient payment rules.
Intended audiences include surgical services administrators, coding and billing professionals, and policy analysts seeking a concise reference on procedural classification, billing implications, and payer considerations for CPT code 43634.
Billing Code Overview
CPT code 43634 describes a surgical procedure in which the provider removes part of the distal (lower) stomach and creates an intestinal pouch. This procedure is a form of partial gastrectomy with reconstruction intended to restore gastrointestinal continuity and reservoir function.
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Service type: Surgical resection and reconstructive gastrointestinal surgery
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Typical site of service: Inpatient hospital or operating room with postoperative inpatient stay
Clinical & Coding Specifications
Clinical Context
A typical patient is a 58-year-old with symptomatic peptic ulcer disease and complications such as gastric outlet obstruction or a distal gastric malignancy requiring distal gastrectomy with reconstruction. The patient presents with progressive postprandial vomiting, weight loss, chronic epigastric pain and imaging/endoscopy confirming a distal gastric lesion not amenable to limited resection. Preoperative workup includes upper endoscopy with biopsy, CT abdomen/pelvis, labs, and anesthesia clearance. The operative plan is distal gastrectomy with creation of an intestinal pouch (gastrojejunostomy or jejunal pouch reconstruction) to restore continuity and improve gastric reservoir function. The procedure is performed in an operating room under general anesthesia; typical site of service is an inpatient acute care hospital. Postoperative workflow includes immediate PACU recovery, inpatient monitoring for hemodynamics, assessment of anastomotic integrity, early ambulation, pain control, and graduated diet advancing from clear liquids to regular as tolerated. Expected inpatient stay is multiple days depending on comorbidities and complications. Relevant providers include general surgeons or surgical oncologists, anesthesiologists, and perioperative nursing teams. Payors commonly involved include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, and Medicare.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Unmodified or standard service | Rarely used; indicates no modifier applies when payer requires explicit reporting. |