Bariatric Surgery Billing Services
Bariatric surgery billing starts long before the operating room. Most payers require a documented BMI, related health conditions, a period of supervised weight management, and prior authorization. Missing one item can delay a case or lead to a denial after surgery.
The operation itself brings more decisions. Sleeve gastrectomy, gastric bypass, and band procedures use different codes, and revisions or removals need their own. These cases usually carry a 90-day global period, so follow-up visits are bundled in. A bariatric surgery billing company needs to manage authorization, coverage rules, and nutrition and behavioral visits across the whole program, not just the surgery claim.
Who this is for
- Bariatric surgeons in private practice
- Hospital-based and accredited bariatric programs
- Surgeons who work with dietitians, psychologists, and medical weight management teams
- Practices that perform revision and conversion surgery
- Programs that handle both self-pay and insured patients
What gets billed
- Laparoscopic sleeve gastrectomy
- Laparoscopic and open Roux-en-Y gastric bypass
- Adjustable gastric band placement
- Band adjustment, revision, and removal
- Revision or conversion of an earlier weight loss operation
- Pre-surgical consults and clearance visits
- Upper endoscopy before or after surgery
- Post-operative nutrition and follow-up visits
- Hernia repair or gallbladder removal done with another procedure
- Medically supervised weight management visits
Commonly billed codes
| Code | Type | What it covers |
|---|---|---|
| 43775 | CPT | Laparoscopic sleeve gastrectomy |
| 43644 | CPT | Laparoscopic gastric bypass with Roux-en-Y limb |
| 43645 | CPT | Laparoscopic gastric bypass with a small bowel reconstruction to limit absorption |
| 43846 | CPT | Open gastric bypass with a short Roux-en-Y limb |
| 43770 | CPT | Laparoscopic placement of an adjustable gastric band |
| 43771 | CPT | Laparoscopic revision of an adjustable gastric band |
| 43772 | CPT | Laparoscopic removal of the band only |
| 43774 | CPT | Laparoscopic removal of the band and port |
| 49320 | CPT | Diagnostic laparoscopy |
| E66.01 | ICD-10-CM | Severe obesity due to excess calories |
| Z68.41 | ICD-10-CM | Adult BMI of 40.0 to 44.9 |
Note
Codes are examples for orientation, not a complete list, and do not guarantee coverage or payment. Always check current code sets and payer policy.
Billing challenges in bariatric surgery
Prior authorization and payer criteria. Many payers require a BMI threshold, related conditions, and records of supervised weight management. A biller experienced in bariatric surgery builds a checklist for each payer and confirms every item before scheduling.
Medicare and payer coverage limits. Coverage often depends on the procedure, the facility, and the patient's condition. Medicare has a national coverage policy for certain procedures. Billers check current policy rather than assume a procedure is covered.
Diagnosis coding and BMI. Payers expect the obesity diagnosis and the BMI code to agree with the chart. Billers confirm the BMI is documented by the provider and that the date is current.
90-day global period. Pre-operative and routine post-operative visits are normally bundled. Billers track the dates so unrelated or non-global services, such as separate nutrition visits, are billed correctly.
Revision and conversion cases. Revisions, band removals, and conversions need codes that match what was actually done. Billers read the operative note closely, since a wrong choice can mean a denial or an overpayment.
Same-session procedures. Hernia repair or gallbladder removal during the case may be bundled or may be separately payable. Billers check bundling edits and add modifiers only when documentation supports them.
Self-pay and cash packages. Some programs offer package pricing. Billers keep package terms, deposits, and refunds clear, and separate them from insured claims.
How Westmont can help
- Matches your program with vetted medical billing experts who know bariatric surgery
- Connects you with end-to-end revenue cycle support, including authorization tracking
- Helps you find denial management support for coverage and medical necessity denials
- Connects you with credentialing support for surgeons and added payers
- Lets you request a quote based on your volume and payer mix
Frequently asked questions
Why do bariatric surgery claims get denied so often?
Many denials come from missing prior authorization, a BMI or health condition that does not match payer criteria, or incomplete records of supervised weight management. A bariatric surgery billing company can review each case against the payer's policy before the date of surgery and keep copies of the records needed for any appeal.
Is there a global period for bariatric surgery?
Bariatric operations usually carry a 90-day global period under Medicare rules, and many payers follow a similar approach. Routine follow-up for the surgery is bundled into the surgical payment. Unrelated care and some separate services may still be billable, so check the payer's current policy.
How are revision and conversion surgeries billed?
Revisions and conversions use different codes from first-time operations. The code depends on what was done, such as band removal, band revision, or a change to a different procedure. The operative note must support the code. Payers may also have their own coverage criteria for revisions.
Can nutrition and psychology visits be billed separately?
Often yes, if they are provided by billable providers and not part of the surgeon's global package. Coverage depends on the payer and the plan. Billers check benefits for each visit type and confirm who is rendering the service.
What should we do if the payer denies prior authorization?
Review the denial reason, compare it with the payer's published criteria, and gather missing records. Many payers allow an appeal or peer-to-peer review with a deadline. A biller can organize the letter and records while the surgeon handles the clinical argument.
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