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Roux-en-y Gastric Bypass denials: what the review data shows

Independent reviewers have decided 38 published cases where an insurer denied Roux-en-y Gastric Bypass — and they overturned the insurer 76.3% of the time. A denial for Roux-en-y Gastric Bypass is a starting position, not a final answer.

Published decisions
38
2001–2026
Overturned
76.3%
29 denials reversed

By condition

Published outcomes when Roux-en-y Gastric Bypass was denied for these conditions.
ConditionDecisionsOverturned
Obesity13
69.2%
Typical time to a decision
21 days
Most land between 17 and 22 days
What the reviewers wrote
Excerpts from the independent reviewers’ published findings — the actual reasoning, quoted, not summarised.

Where the denial was overturned

Nature of Statutory Criteria/ Case Summary: The enrollee has requested authorization and coverage for weight loss surgery involving CPT code 43644 (laparoscopy, surgical, gastric restrictive procedure with gastric bypass and Roux-en-Y gastroenterostomy (roux limb 150 cm of less), CPT code 43846 (Gastric restrictive procedure, with gastric bypass, for morbid obesity, with short limb (less than 100 cm) Roux-en-Y gastroenterostomy and two days of inpatient acute hospitalization. The health plan has denied this request as not medically necessary. A review of the records indicates this enrollee was evaluated by her surgeon for gastric bypass weight loss surgery. She previously weighed 215 pounds but had reduced her weight to 193 pounds using a professionally monitored weight loss program with exercise.
Medical Necessity · 2019 · IMR MN19-30964
The patient is a 36-year-old female with a body mass index (BMI) of 40 and comorbid conditions including urinary stress incontinence, gastroesophageal reflux disease, and depression. In addition, it has been noted that the patient has a history of migraine headaches. It does not appear the patient has obtained psychiatric clearance for weight loss surgery. The Health Plan has denied authorization and coverage for gastric bypass on the basis that it is not medically necessary.With a BMI of 40 and comorbid conditions, the patient meets accepted national medical necessity criteria for consideration of weight loss surgery. Roux-en-Y gastric bypass is medically indicated and medically necessary for treatment of this patient’s morbid obesity.
Medical Necessity · 2004 · IMR MN04-3647

Where the denial was upheld

Worth reading too — these show what an appeal has to overcome.
Nature of Statutory Criteria/ Case Summary: The enrollee requested authorization and coverage for Roux-en-Y gastric bypass procedure. The enrollee has diagnoses of systemic lupus erythematosus (SLE), morbid obesity, obstructive sleep apnea, hypertension, and asthma. Findings:She was evaluated for bariatric surgery due to her body mass index (BMI) of 43. She underwent a gastric sleeve procedure. Her weight at that time was 277 lbs. A follow-up visit demonstrated a 79-lb. weight loss. She reported attempts to adhere to dietary and exercise routines, but other physical maladies had limited her exercise abilities and her weight had increased to 230.5 lbs.
Medical Necessity · 2019 · IMR MN19-31038
The patient is a 46-year-old female who is 5’1” weighing 240 pounds with a body mass index (BMI) of 45. She has comorbid conditions of hypertension, asthma, and osteoarthritis. She is status post Nissen fundoplication. She has been approved for bariatric surgery on the condition that she loses weight preoperatively and attends support group meetings. She has not complied with these conditions. Based upon the information provided, she has not been evaluated by a bariatric surgeon since 2004. In addition, it is unclear when the patient underwent a psychological evaluation to determine whether she is an appropriate candidate for weight loss surgery.With a BMI of 45 and comorbid conditions the patient meets accepted criteria for consideration of weight loss surgery.
Medical Necessity · 2005 · IMR MN05-4585

Figures and quotations on this page come from 42,749 published decisions in the California DMHC Independent Medical Review dataset. These are California outcomes — every state runs an equivalent external review, but the rates here are California’s. Excerpts are quoted verbatim from the public record and describe this treatment generally, not any individual case.

How to use this in your appeal

These are outcomes from California’s external review program — an independent physician panel that binds the insurer. Every state has an equivalent process, and internal appeals succeed even more often. Cite the outcome record for Roux-en-y Gastric Bypasswhen you appeal: reviewers routinely find that denials like yours didn’t hold up.

SOURCE: CALIFORNIA DMHC INDEPENDENT MEDICAL REVIEW OUTCOMES (CHHS OPEN DATA) · DERIVED AGGREGATE STATISTICS ONLY · METHODOLOGY

Not legal or medical advice. Coverage Rights is a self-help tool that helps you prepare your own appeal. For advice about your specific situation, talk to a licensed attorney or your doctor.

Denied Roux-en-y Gastric Bypass? 76.3% got it reversed.

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