Bariatric Surgery Billing Services

Bariatric surgery is approved or denied long before the patient reaches the operating room. Coverage depends on a documented history of body mass index, comorbidities, supervised weight loss attempts, and psychological and nutritional evaluations, and a missing piece of that packet is the most common reason a case denies. After surgery, the 90-day global period decides which follow-up visits are billable and which are included in the surgical payment, and getting that wrong costs revenue in both directions.
MedPlus RCM provides medical billing, coding, credentialing, and denial management for bariatric surgery practices, built around the specialty’s actual code families and payer requirements.

Bariatric Surgery billing challenges

The core procedure codes define the case. Laparoscopic Roux-en-Y gastric bypass is reported with 43644, laparoscopic sleeve gastrectomy with 43775, laparoscopic adjustable gastric band placement with 43770, and revision of a gastric bypass with 43848. Each of these carries a 90-day global period, meaning routine follow-up care related to the surgery within that window is included in the surgical payment and cannot be separately reported. Endoscopic sleeve gastroplasty gained its own Category I code, 43889, effective January 1, 2026, also with a 90-day global period; payer adoption of newer codes can vary, so coverage should be confirmed per payer.
Modifiers do the heavy lifting during the global period. Modifier 24 is used for an unrelated evaluation and management service during the global period, modifier 78 for an unplanned return to the operating room for a related procedure such as repair of a complication, and modifier 79 for an unrelated procedure during the global period. When surgical care is split between providers, modifier 54 identifies the surgeon and modifier 55 identifies the provider handling postoperative management. Each modifier must be justified in the documentation, especially during postoperative windows.
Prior authorization is where most bariatric cases are won or lost. Payers commonly require a documented BMI history, evidence of comorbidities such as type 2 diabetes, hypertension, sleep apnea, or reflux, a record of medically supervised weight loss attempts, psychological and nutritional evaluation reports, and a formal surgical recommendation. Diagnosis coding must support medical necessity: the obesity diagnosis is typically paired with BMI codes and comorbidity codes, and those conditions must be discussed in the assessment and plan, not merely listed, for the claim to hold up on review.

What MedPlus RCM handles for Bariatric Surgery practices

• End-to-end medical billing. Charge entry, claim scrubbing, submission, payment posting, and patient billing, the full cycle.
• Medical coding. Certified coders assign current ICD-10, CPT, and HCPCS codes matched to your documentation and specialty.
• Provider credentialing and enrollment. End-to-end enrollment with commercial payers and Medicare, plus re-credentialing maintenance.
• Denial management and recovery. Every denial investigated to root cause, corrected, and appealed with documentation.
• A/R recovery. Aged and outstanding balances audited and pursued, including balances already written off where the appeal window is still open.
• Financial reporting. Clean claim rates, collections, denial patterns, and A/R aging visible by payer and provider.
  We serve bariatric surgery practices nationwide, including hospital-based programs, ambulatory surgery centers, and practices offering both surgical and endoscopic weight loss procedures.

Results Bariatric Surgery practices can check

MedPlus RCM maintains a 99% clean claim rate and keeps client accounts receivable under 30 days. Pricing is a performance-based percentage of successfully collected revenue: if you don’t get paid, we don’t get paid. We are 100% HIPAA compliant, and onboarding takes 2 to 4 weeks depending on practice size, with no disruption to your daily cash flow.

Frequently asked questions

What does a bariatric prior authorization packet need?
Typically a BMI history, documented comorbidities, a record of supervised weight loss attempts, psychological and nutritional evaluation reports, and a formal surgical recommendation. Exact requirements vary by payer.
What is the global period for bariatric surgery?
Most bariatric procedure codes carry a 90-day global period. Routine surgical follow-up within that window is included in the surgical payment and is not separately billable.
How are complications during the global period billed?
An unplanned return to the operating room for a related complication is reported with modifier 78, which signals a related procedure during the global period. Documentation must link the complication to the original surgery.
How are revisions billed?
Revisions use their own procedure codes, such as 43848 for revision of a gastric bypass, and the claim must document the reason for revision and the prior procedure.
What does MedPlus RCM charge?
A performance-based percentage of successfully collected revenue. If you don’t get paid, we don’t get paid.

Get a free financial audit

Find out where your bariatric surgery practice is losing revenue. Request a free financial audit and our specialists will review your claims, denials, and A/R.
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