Specialty billing
General Surgery Medical Billing Services
General surgery billing turns almost entirely on global periods and modifier discipline. Major procedures carry a 90-day global period bundling pre-operative, intra-operative and routine post-operative care, and nearly every general surgery billing error is a failure to apply the correct modifier around that window.
General Surgery benchmarks
- Typical denial rate
- 12–19%
- Days in AR
- 40–54
- Achievable clean claim rate
- 96%+
Typical ranges for general surgery practices. Your actual numbers are measured during the audit.
The complexity
Why general surgery is uniquely difficult to bill
Major procedures carry 90-day global periods; minor procedures carry 10 days
The decision-for-surgery visit requires modifier 57 to be separately payable
Staged, related and unrelated returns to the OR each require different modifiers
Multiple procedure reduction sequences payment across procedures in one session
Assistant surgeon and co-surgeon roles require specific modifiers and documentation
Laparoscopic conversion to open changes the code billed entirely
Coding
General Surgery procedure codes we work with daily
A representative sample, not an exhaustive list. Coders are assigned by specialty rather than pooled.
| Code | Description |
|---|---|
| 47562 | Laparoscopic cholecystectomy |
| 44970 | Laparoscopic appendectomy |
| 49505 | Repair of initial inguinal hernia, age 5 years or older |
| 19120 | Excision of breast lesion, open |
| 44140 | Colectomy, partial, with anastomosis |
| 49650 | Laparoscopic repair of initial inguinal hernia |
Revenue leakage
Where general surgery practices lose money
These are the denial patterns specific to this specialty — the ones a general-purpose billing service will not be looking for.
Global period bundling
Post-operative visits billed within the global period without modifier 24 establishing an unrelated service.
Missing modifier 57
The visit at which surgery was decided billed without modifier 57, causing it to bundle into the procedure.
Return-to-OR modifier errors
Modifiers 58, 78 and 79 confused, misclassifying staged, related and unrelated returns to the operating room.
Assistant surgeon documentation
Assistant surgeon claims denied for lack of documented medical necessity for the assistant in the operative note.
Conversion coding
Laparoscopic code billed where the procedure was converted to open, or the open code billed without documenting the conversion.
Payer landscape
What general surgery practices need to know about payers
Payer policy drives more general surgery denials than coding does. Knowing the policy before the service is what prevents them.
- Payer policies on assistant surgeon eligibility vary by procedure — many publish lists of procedures where an assistant is not reimbursable.
- Multiple procedure reduction typically pays 100% on the highest-valued procedure and 50% on subsequent ones.
- Conversion from laparoscopic to open is billed with the open code only, with the conversion documented in the operative note.
Questions
General Surgery billing FAQ
Last updated August 20, 2026
Reviewed by a certified coding leadAll three apply to procedures during a global period, and confusing them is the most common general surgery billing error. Modifier 58 is a staged or planned related procedure. Modifier 78 is an unplanned related return to the operating room, typically a complication. Modifier 79 is an entirely unrelated procedure. Each carries different payment implications.
When it is the visit at which the decision for surgery was made, billed with modifier 57 for major procedures. Without that modifier, the visit bundles into the global surgical package and pays nothing. Routine pre-operative visits after the decision has been made are always included in the global package.
The assistant bills the same procedure code with modifier 80, 81 or 82 depending on the role. Payment is a percentage of the surgeon's fee. Many payers publish procedure lists where an assistant is not reimbursable, and the operative note must document why the assistant was medically necessary.
Only the open procedure code is billed — not both, and not the laparoscopic code with a modifier. The operative note should document the conversion and the clinical reason for it, which also supports the higher relative value of the open procedure.
Primary sources
Coverage, rates and local policy for general surgery, at the source.
- Global Surgery booklet (opens in a new tab)
Centers for Medicare & Medicaid Services — What the 10 and 90-day global periods include, and which modifiers break out of them. The authority behind most postoperative bundling disputes.
- NCCI Policy Manual for Medicare Services (opens in a new tab)
Centers for Medicare & Medicaid Services — The reasoning behind the edits, chapter by chapter. Where the edit files tell you two codes conflict, this explains why — which is what an appeal has to address.
- Medicare Physician Fee Schedule lookup (opens in a new tab)
Centers for Medicare & Medicaid Services — Official allowed amounts by CPT/HCPCS code and locality. The reference point most commercial contracts are written against as a percentage.
Get a free general surgery billing audit
We'll review your general surgery denial patterns, coding accuracy and AR aging against the benchmarks above. Takes about two minutes to request.
No setup fees · You pay when we collect · Pricing from 3% of net collections