CPT 43644 Reimbursement Benchmarks & Policy | OpenPayer

Summary & Overview

CPT 43644: Laparoscopic Gastric Bypass with Roux-en-Y Gastroenterostomy

CPT code 43644 is a key billing code for laparoscopic gastric bypass surgery with Roux‑en‑Y gastroenterostomy, a widely performed bariatric procedure for patients with severe obesity. This code is nationally significant as it represents a standard of care for surgical weight loss interventions, with broad coverage across major payers including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The procedure is typically performed in hospital outpatient settings and is recognized for its clinical effectiveness in reducing obesity-related comorbidities.

This publication provides a comprehensive overview of CPT code 43644, including payer coverage, clinical context, and policy updates relevant to bariatric surgery. Readers will gain insights into coding benchmarks, reimbursement trends, and the regulatory landscape affecting gastric bypass procedures. The analysis also highlights common billing modifiers and associated taxonomies, offering clarity for stakeholders navigating the complexities of medical billing and payer requirements. By understanding the scope and significance of this code, healthcare professionals and administrators can better interpret national standards for bariatric surgery billing and coverage.

AetnaBlue Cross Blue ShieldCigna HealthMedicareUnitedHealthcareCPT 43644bariatric surgerygastric bypassRoux-en-Yhospital outpatientmedical billingobesitysurgical procedurepolicy updateclinical benchmarks

CPT Code Overview

CPT code 43644 describes a laparoscopic, surgical gastric restrictive procedure involving gastric bypass and Roux‑en‑Y gastroenterostomy, with a Roux limb of 150 cm or less. This procedure is a form of bariatric surgery designed to treat severe obesity by reducing the size of the stomach and rerouting the digestive tract. The typical site of service for this procedure is the hospital outpatient department, where patients undergo minimally invasive surgery to achieve significant weight loss and improve obesity-related health conditions.

Clinical & Coding Specifications

Clinical Context

A typical patient scenario involves an adult patient diagnosed with morbid obesity, class 2, or class 3 obesity, who has not achieved significant weight loss through conservative measures such as diet, exercise, and medical management. The patient is referred to a bariatric surgeon for evaluation. After multidisciplinary assessment and clearance, the patient is scheduled for a laparoscopic gastric bypass with Roux‑en‑Y gastroenterostomy (CPT code 43644) in a hospital outpatient department. The clinical workflow includes preoperative assessment, surgical intervention, postoperative monitoring, and follow-up for weight loss and comorbidity management.

Coding Specifications

Modifiers:
- Modifier 22 (Increased Procedural Services): Used when the procedure requires significantly more effort or complexity than usual, such as due to patient anatomy or intraoperative complications.
- Modifier 51 (Multiple Procedures): Applied when more than one surgical procedure is performed during the same operative session.
Provider Taxonomies:

Taxonomy Code

National Reimbursement Benchmarks

National mean rates for CPT code 43644 show a significant gap between Medicare and commercial payers. Medicare's mean rate is $1,626.86, while the BUCA (average commercial) mean rate is $2,379.40, reflecting a difference of $752.54. Commercial payers such as UnitedHealth Group and Cigna report even higher mean rates, at $3,114.66 and $2,784.06 respectively.

Rate dispersion, measured by the difference between the 75th and 25th percentiles, varies notably across payers. Blue Cross Blue Shield has the tightest range ($1,179.00), while UnitedHealth Group exhibits the widest ($1,863.67). Cigna also shows substantial dispersion ($1,597.00), indicating greater variability in contracted rates. The table and chart below present the full breakdown of national benchmarks for each payer.

State Benchmarks

State: Alaska1 / 50

Alaska Benchmarks

Alaska exhibits a substantial spread in reimbursement rates for CPT code 43644, with commercial payers showing much higher variability than Medicare. For example, Blue Cross Blue Shield's rate spread between the 75th and 25th percentiles is $1,401.33, while Cigna's is $2,260.80. In contrast, Medicare's spread is only $161, indicating more consistent rates across the state. Aetna's rates are uniform, with all percentiles at $9,159.00, suggesting a flat reimbursement structure for this code.

Compared to national averages, Alaska's commercial payers reimburse at significantly higher levels. Aetna's mean rate in Alaska is over $7,900, more than triple its national mean. The table and chart below present the full breakdown of payer-specific rates, highlighting the differences in reimbursement across the major payers in Alaska.

Key Insights for Alaska

Aetna is the highest paying payer in Alaska for CPT 43644, with a mean rate of $7,969.56, while Medicare is the lowest at $1,608.63.
All commercial payers in Alaska reimburse at significantly higher rates than their respective national averages, with Aetna's mean rate more than triple the national mean.
The rate spread (difference between 75th and 25th percentiles) is largest for Aetna ($0, as all percentiles are equal), and smallest for Medicare ($161), indicating limited variability for Medicare compared to commercial payers.

CPT 43651: Laparoscopic Truncal Vagotomy for Duodenal Ulcer

CPT-43653-GASTRIC-TUBE-PLACEMENT-FOR-ENTERAL-ACCESS

CPT 43653: Gastric Tube Placement for Enteral Access

CPT-43652-LAPAROSCOPIC-SELECTIVE-HIGHLY-SELECTIVE-VAGOTOMY

CPT 43652: Laparoscopic Selective or Highly Selective Vagotomy

43645-LAPAROSCOPY-SURGICAL-GASTRIC-RESTRICTIVE-PROCEDURE-WITH

CPT 43645: Laparoscopic Gastric Bypass with Small Intestine Reconstruction

CPT-43647-LAPAROSCOPIC-GASTRIC-STIMULATION-ELECTRODE-PLACEMENT

CPT 43647: Laparoscopic Gastric Stimulation Electrode Placement

CPT-43659-UNLISTED-LAPAROSCOPIC-STOMACH-PROCEDURE

CPT 43659: Unlisted Laparoscopic Procedure on the Stomach

CPT-43648-LAPAROSCOPIC-GASTRIC-NEUROSTIMULATOR-ELECTRODE-MANAGEMENT

CPT 43648: Laparoscopic Management of Gastric Neurostimulator Electrodes

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