Neurosurgery Billing Services

Neurosurgery Billing Complexity

Neurosurgery combines every hard problem in surgical billing in one specialty. Cases are long, often multi-level, frequently involve a second surgeon or an assistant, carry 90-day global periods, and generate a separate stream of intraoperative monitoring claims. The dollar value per claim is high enough that a single modifier error is a five-figure problem. This is why our coders for the specialty work neurosurgery only, inside our specialty medical billing program, and why the operative note, not the schedule, drives every code.

Global Surgical Package

• Every procedure carries a global period of 0, 10 or 90 days. Major neurosurgical procedures are almost all 90-day codes.
• The 90-day period is counted as the day before surgery, the day of surgery, and the 90 days that follow, and routine postoperative visits inside it are not separately payable.
• A staged or planned second procedure inside the period carries modifier 58, and a new global period begins from it.
• An unplanned return to the operating room for a related complication carries modifier 78. It does not reset the global period and is typically paid at the intraoperative portion only.
• An unrelated procedure in the period carries modifier 79 and starts its own global period. Choosing between 58, 78 and 79 is decided from the operative note, never from habit.

Modifiers 62, 80 and 22

• Modifier 62, two surgeons: each surgeon performs a distinct part of the same procedure as a primary surgeon and each reports the code with modifier 62. Medicare pays each co-surgeon 62.5 percent of the global fee schedule amount, so the documentation from both surgeons has to describe distinct work.
• Modifier 80, assistant surgeon: a second surgeon who assists rather than performs a distinct portion reports modifier 80. Medicare pays 16 percent of the surgical fee schedule amount for a physician assistant-at-surgery.
• Modifier 22, increased procedural services: reserved for cases where the surgeon spent significantly more time, effort or resources than the procedure normally requires. The operative note has to state what made the case unusual and how; a bare modifier without that narrative is denied or paid at the base rate.
• Co-surgeon versus assistant is the most expensive mix-up in the specialty, because 62.5 percent and 16 percent of a spine fee schedule amount are very different numbers. The full modifier set is in the billing modifiers library.

Spine Coding Pitfalls

• Multi-level procedures are coded by the primary code plus the correct add-on code per additional level or interspace, and the counts in the note have to match the counts on the claim exactly.
• Instrumentation, bone graft and arthrodesis are separately reportable in defined combinations and bundled in others. NCCI edits decide which, and they change every quarter.
• Approach matters: anterior, posterior and lateral procedures at the same level are not interchangeable codes, and a combined approach is coded from what the note describes was done.
• Decompression performed at the same level as fusion is bundled in many combinations. Billing both without checking the edit is a routine denial.
• Every spine case is coded from the operative note by a neurosurgery coder and checked against current edits under CPT coding before release.

IONM Billing

Intraoperative neurophysiology monitoring is billed as its own stream, separately from the surgeon and from the anesthesia team. Continuous monitoring with one-on-one personal attendance in the operating room is reported per 15 minutes with CPT 95940, and the baseline studies performed, such as somatosensory evoked potentials at 95938, are reported in addition. The monitoring time has to be documented in minutes with start and stop times, the monitoring professional cannot be the surgeon or the anesthesiologist, and payer policy on remote versus in-room monitoring differs. We reconcile the monitoring log to the anesthesia record so the minutes billed are the minutes documented.