Global Surgery Period & Required Modifier
Global Surgery Period & Required Modifier - a deterministic tool in Sophie Well's Billing & Reimbursement group.
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What this is
Global Surgery Period & Required Modifier is one of 230 deterministic tools in Sophie Well's Billing & Reimbursement group. Global Surgery Period & Required Modifier - a deterministic tool in Sophie Well's Billing & Reimbursement group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
CMS Pub. 100-04 Ch. 12 40 (global surgery package); MLN Global Surgery Booklet. GLOB DAYS 000/010/090 = 0/10/90 postoperative days (090 adds 1 preoperative day); XXX/YYY/ZZZ/MMM do not carry a fixed day count. Post-op modifiers 24/58/78/79; pre-op 57/25. Read the source ↗
Worked example: Inside the 90-day global (window 2025-12-31 through 2026-04-01); an unrelated E/M is separately billable with modifier 24.
Sophie Well is a reference and educational tool. Not medical, legal, or financial advice. Does not replace clinician judgment, professional billing review, or legal counsel.