Treatment of obesity (278.00) is excluded from medical coverage.  However, covered services for the medical treatment for morbid obesity (278.01) are eligible for reimbursement.  Coverage for the medical treatment of morbid obesity is determined according to individual or group customer benefits.

Surgical Treatment

There are a variety of surgeries intended for the treatment of morbid obesity.  All procedures fall into one of these two categories:

1. Gastric restrictive surgical procedures (e.g., vertical banded gastroplasty, gastric stapling, laparoscopic adjustable gastric banding, mini-gastric bypass, gastric bypass with Roux-en-Y) create a small gastric pouch, resulting in weight loss from early satiety and decreased dietary intake.  The decreased capacity of the stomach reduces the volume of food an individual consumes before feeling full.
2. Malabsorptive surgical procedures (e. g., biliopancreatic diversion, biliopancreatic diversion with duodenal switch, long-limb gastric bypass, intestinal gastric bypass) bypass a section of the small intestines.  Weight loss results from intestinal malabsorption without dietary modification.

The following procedures are covered for the surgical treatment of morbid obesity when all of the patient selection criteria are met.

• Vertical banded gastroplasty and gastric stapling (open) (43842,43843)

Vertical banded gastroplasty is a type of gastric restrictive procedure, which consists of constructing a small pouch with a restricted outlet along the lesser curvature of the stomach.  The outlet may be externally reinforced to prevent disruption or dilation.

Gastric stapling is accomplished by stapling the upper stomach to create a small pouch into which food flows after it’s swallowed.  The outlet of this pouch is restricted by a band of synthetic mesh, which slows its emptying, so that the person feels full after only a few bites of food.

• Roux-en-Y gastric bypass (RY-GBP) {open (43846) or laparoscopic (S2085)}

The open Roux-en-Y gastric bypass is considered the gold standard for bariatric surgery.  A small (30 cc) proximal gastric pouch is constructed which is then divided from the remainder of the stomach just below the cardia with a short (less than 100 cm) Roux-en-Y gastrojejunostomy performed between the proximal gastric pouch and a Roux-en-Y jejunal limb.

Patient Selection Criteria

• The patient is morbidly obese;

Morbid obesity is defined as a condition of consistent and uncontrollable weight gain that is characterized by a weight which is at least 100 lbs. or 100% over ideal weight or a BMI of at least 40 or a BMI of 35 with comorbidities (e.g., hypertension, cardiovascular heart disease, dyslipidemia, diabetes mellitus type II, sleep apnea).

• The patient is at least 18 years old; and
  
  
• The patient has received non-surgical treatment (e.g.,
  dietitian/nutritionist consultation, low calorie diet, exercise program, and behavior modification) and attempts at weight loss have failed.  The patient must attend physician supervised nutrition and exercise programs at least 6 months in duration and they must occur within two years prior to the proposed bariatric surgery.

Patient selection is a critical process requiring psychiatric evaluation and a multidisciplinary team approach.

Gastric stapling and gastric bypass surgery reported for the treatment of "morbid obesity" should be processed under the appropriate procedure code 43842, 43843, 43846, 43848, or S2085 respectively.  Claims for "vertical banded gastroplasty" should be processed under code 43842.  (See HMPB S-96 for additional information on laparoscopic surgery.)

In addition, itemized charges reported for gastroduodenostomy and/or surgery should be combined with the stapling, vertical banded gastroplasty or bypass surgery.  The gastrojejunostomy in conjunction with gastric stapling, vertical banded gastroplasty or gastric bypass claim should be processed under the appropriate code 43842, 43843, 43846, 43848, or S2085.

Repeat or Revised Bariatric Surgical Procedures (43848)

• Conversion of a gastric restrictive procedure without gastric bypass (e.g., vertical banded gastroplasty) to a gastric restrictive procedure with gastric bypass (e.g., for morbid obesity)
• Revision of a failed gastric restrictive procedure (e.g., restapling of dehisced vertical banded gastroplasty staple line, severe adhesions of the gastric pouch, stenosis of stoma, dilation of stoma)

A Roux-en-Y gastric bypass (43846, S2085) may be considered medically necessary for patients who have not had adequate weight loss (defined as loss of more than 50 percent of excess body weight) from vertical banded gastroplasty (43842).  Since, maximal weight loss is not typically achieved until 1 to 2 years of vertical banded gastroplasty, a Roux-en-Y gastric bypass is considered not medically necessary and not covered if performed within two years of a vertical banded gastroplasty.  In addition, a Roux-en-Y gastric bypass following vertical banded gastroplasty is considered not medically necessary and not covered for patients who have been substantially noncompliant with a prescribed nutrition and exercise program following the vertical banded gastroplasty.  More than one vertical banded gastroplasty or Roux-en-Y gastric bypass procedure is considered not medically necessary.

Reoperation may be required to either “take-down” or revise the original bariatric procedure.  Surgical revision or reversal (i.e., take-down) is covered for members who have complications from the primary procedure demonstrated by diagnostic study (e.g., obstruction, stricture, dilation of the gastric pouch).  A reoperation or reversal is considered not medically necessary unless the primary bariatric surgery has resulted in complications, and therefore, it is not covered.  (See HMPB Z-35 for additional information on repeat surgical procedures.)

The following procedures are considered experimental/investigational, and therefore, they are not covered.  A participating, preferred or network provider can bill the member for the denied service.

• Biliopancreatic bypass (the Scopinaro procedure) (43847)

The biliopancreatic diversion (BPD) was first reported by Scopinaro, et al, in 1976 as a procedure that combined both gastric restriction and malabsorption.  The technique includes a partial gastrectomy to create a 200-300 cc pouch followed by division and anastomosis of the terminal ileum to the stomach.  The jejunum is totally excluded from digestive continuity with the distal end anastomosed to the terminal ileum, creating a “common channel” of ileum approximately 50 cm from the ileocecal valve.  A high incidence and the severity of complications following BPD have led many surgeons to restrict its use as an operation for the treatment of super obese patients.

• Biliopancreatic bypass with duodenal switch

The biliopancreatic bypass with duodenal switch is a modification of the biliopancreatic bypass.  The most significant difference from the biliopancreatic bypass to the duodenal switch procedure is utilization of a sleeve gastrectomy of the greater curvature rather than a distal gastrectomy and anastomosis of the ileum to the duodenum instead of the stomach.

• Laparoscopic adjustable gastric banding

Laparoscopic adjustable gastric banding (e.g., the Lap-Band system) involves creating a gastric pouch by placing a gastric band around the exterior of the stomach.  The band is attached to a reservoir that is implanted subcutaneously in the abdominal fascia in the patient’s upper abdomen.  Injecting the reservoir with saline will alter the diameter of the gastric band.  This limits food consumption and creates an earlier feeling of fullness.  Subsequent adjustments can be made either to tighten or loosen the band to meet individual patient needs.

• Long-limb gastric bypass (i.e., > 100cm)

The long-limb gastric bypass differs from the conventional gastric bypass only in the length of defunctionalized jejunum.  The long-limb gastric bypass was designed to induce greater malabsorption by diverting bile and pancreatic secretions distally in the digestive tract.  This was felt to produce a greater malabsorption of fats without the protein malabsorption associated with intestinal bypass.

• Mini-gastric bypass

A mini-gastric bypass is a variation of the gastric bypass.  Using a laparoscopic approach, the stomach is segmented, similar to a traditional gastric bypass, but instead of creating a Roux-en-Y anastomosis, the jejunum is anastomosed directly to the stomach, similar to a Billroth II procedure.

• Two-Staged Procedure for Morbid Obesity

In the two-staged procedure, the greater curve of the stomach is removed in the initial procedure, and then a Roux-en-Y technique is used to anastomose the small bowel to the stomach remnant.  Bariatric procedures are usually completed in one operative procedure.  At this time, multi-staged bariatric procedures are considered experimental/investigational.

There is a lack of peer reviewed medical literature that contains comparative data that demonstrates the above mentioned procedures are equivalent to or offer any advantage over the accepted standard of vertical-banded gastroplasty or Roux-en-Y gastric bypass. 

Intestinal bypass

The intestinal (e.g., jejunoileal) bypass is created by dividing the small bowel 30 cm distal to the ligament of Treitz.  The proximal cut end of the small bowel is anastomosed to the terminal ileum 50 cm proximal to the ileocecal valve.  The rest of the small bowel remains a blind loop.

When intestinal bypass surgery is reported, the claim should be processed in accordance with Medical Policy Bulletin G-21 (procedures of questionable current usefulness). 

Description

Obesity is an increase in body weight beyond the limitation of skeletal and physical requirements, as a result of excessive accumulation of fat in the body. In general, 20% to 30% above "ideal" bodyweight, according to standard life insurance tables, constitutes obesity. Morbid obesity is further defined as a condition of consistent and uncontrollable weight gain that is characterized by a weight which is at least 100 lbs. or 100% over ideal weight or a body mass index (BMI) of at least 40 or a BMI of 35 with comorbidities (e.g., hypertension, cardiovascular heart disease, dyslipidemia, diabetes mellitus type II, sleep apnea).

Body mass index (BMI) is a method used to quantitatively evaluate body fat by reflecting the presence of excess adipose tissue. BMI is calculated by dividing measured bodyweight in kilograms by the patient's height in meters squared. The normal BMI is 20-25 kg/meters squared.

NOTE:

This policy is designed to address medical guidelines that are appropriate for the majority of individuals with a particular disease, illness, or condition. Each person's unique clinical circumstances may warrant individual consideration, based on review of applicable medical records.

Since the adjustable gastric banding and Lap-Band procedures are neither gastric bypass surgery nor gastric stapling procedures, services for these procedures would not be considered covered surgical treatment for morbid obesity. Therefore, the adjustable gastric banding and Lap-Band procedures will be denied as not covered.

Comprehensive and Wraparound

Payment should not be made for medical services performed for the evaluation and treatment of obesity alone unless such services are a necessary treatment of a disease or condition aggravated by obesity (e.g., cardiac and respiratory diseases, diabetes, and hypertension).

PRN References

02/1993, Obesity
04/2003, Obesity defined
06/2003, Highmark considers laparoscopic adjustable gastric banding investigational
10/2003, Obesity guidelines revised

National Heart, Lung, and Blood Institute, Clinical Guidelines on the Identification, Evaluation and Treatment of Overweight Obesity in Adults, National Institute of Health 1998

Laparoscopic Adjustable Silicone Gastric Banding, Surgical Clinics of North America, Volume 81, No. 5, 10/2001

National Blue Cross Blue Shield Association Medical Policy 7.01.47, Surgery for Morbid Obesity, 2/2003

Overview of Bariatric Surgery, Journal of American College of Surgeons, Volume 194, No. 3, 03/2002

Evidence-Based Medicine: Open and Laparoscopic Bariatric Surgery, Surgical Endoscopy, Volume 16, No. 5, 05/2002

Laparoscopic Adjustable Gastric Banding at a U.S. Center with up to 3-Year Follow-Up, Obesity Surgery, Volume 12, No. 3, 06/2002

Long-Term Data Indicate a Progressive Loss in Efficacy of Adjustable Silicone Gastric Banding for the Surgical Treatment of Morbid Obesity, Surgery, Volume 132, No. 4, 10/2002

Laparoscopic Surgery for Morbid Obesity, Surgical Clinics of North American, Volume 81, No. 5, 10/2001

Gastrointestinal Surgery for Severe Obesity, National Institutes of Health, Consensus Development Conference Statement, 03/1991

Malabsorptive Obesity Surgery, Surgical Clinics of North America, Volume 81, No. 5, 10/2001

Morbid Obesity: the Value of Surgical Intervention, Clinics in Family Practice, Volume 4, No. 2, 06/2002

Obesity and Its Surgical Management, American Journal of Surgery, Volume 184, No. 2, 08/2002

Medical and Surgical Options in the Treatment of Severe Obesity, American Journal of Surgery, Volume 184, No. 6B, 12/2002

Bariatric Surgery: Creating New Challenges for the Endoscopist, Gastrointestinal Endoscopy, Volume 57, No. 1, 01/2003

Management of the Bariatric Surgery Patient, Endocrinology and Metabolism Clinics, Volume 32, No. 2, 06/2003