Global Surgery Calculator
Calculate the global surgery period (0, 10, or 90 days) for CPT codes. Find post-operative dates and billing start parameters.
Interactive Calculator
1. Provide Details
2. Output Results
How to Calculate: Formula & Steps
Adds CPT designated global postoperative period days (000, 010, or 090) to the date of operation to find the final global care window.
End Date = Surgery Date + Global Days; Billing Resumes = End Date + 1 DayStep-by-Step Calculation Example
A surgery on July 1 with a 90-day global period has its global period end on September 29. Separate billing resumes September 30 (Day 91 post-op).
Common Mistakes to Avoid
- Failing to count the surgery date as Day 0 when counting 10 or 90 days for post-op calculations.
- Forgetting that commercial insurance companies can differ from Medicare rules.
Practical Use Cases
- Medical billing post-op checks
- Surgical practice scheduling coordination
Expert Tips
- Use CPT code 99024 to document post-op visits within global periods for quality reporting even though they yield zero cash reimbursement.
Frequently Asked Questions About Global Surgery Calculator
What is a global surgery period?
A global period is the timeframe during which routine post-operative care is bundled into the surgical procedure payment and cannot be billed separately.
What modifiers bypass global periods?
Modifiers like -24 (unrelated E/M), -58 (staged procedure), -78 (return to OR for complications), and -79 (unrelated procedure by same physician) are used to report services during global periods.
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