What is OHIP billing code E400C?

E400C is "After hours premium - Evenings, weekends and holidays", an OHIP Surgical Assists code from the Ontario Schedule of Benefits (Physician Services).

How much does E400C pay?

E400C is a percentage premium: it adds 50% to the fee of the eligible service it is billed with, per the Ontario Schedule of Benefits.

How do I bill E400C to OHIP?

E400C is submitted through OHIP's MCEDT claims system, either directly or via billing software. SnapBill validates E400C claims against the Schedule of Benefits rules before submission.

What codes are related to E400C?

Codes related to E400C in the Schedule of Benefits include E401C, C998C, C985C, C999C, E005C.

All codes

E400C

E400C – After hours premium - Evenings, weekends and holidays

OHIP Surgical Assists Code — ANAESTHESIOLOGISTS’ SERVICES · Schedule of Benefits

Ask AI Bill This Code — Sign Up Free

This premium provides a 50% increase to the total anaesthetic fee when the anaesthesia service for a case commences in the evenings (17:00h – 24:00h) Monday to Friday, or during daytime and evenings on Saturdays, Sundays or Holidays. The total anaesthetic fee is calculated by adding the number of basic and time units for the surgical procedure and multiplying that total by the anaesthesiologist unit fee, as detailed in the General Preamble (, ).

When to Use

Apply E400C when the anaesthesia start time for a procedure falls between 17:00 and 24:00 on any weekday.
Apply E400C for any procedure starting between 07:00 and 24:00 on Saturdays, Sundays, or statutory holidays.
Use E400C in conjunction with C998C or C985C when the criteria for both the percentage-based after-hours premium and the flat-fee special visit premium are met.

Common Pitfalls

Do not confuse E400C with E401C; E400C is strictly for evenings and weekends, while E401C applies to the 00:00 to 07:00 night period.
Avoid claiming E400C if the procedure start time is outside the defined 17:00-24:00 window on weekdays, as this will trigger an automatic rejection.
Ensure the anaesthesia start time is accurately recorded in the chart, as discrepancies between the billed start time and the hospital record are a primary cause of audit recovery.

Billing Tips

Always calculate the 50% increase based on the total units (basic units plus time units) before applying the anaesthesiologist unit fee.
Remember that E400C is a percentage-based premium, making it additive to the flat-rate special visit premiums (C998C or C985C) when the travel requirement is satisfied.

Have a specific question? Ask our billing assistant

Percentage Premium: 0.5%

This code applies a percentage increase to the base procedure fee

Effective: January 23, 2026

Ready to bill this code?

SnapBill makes OHIP billing simple — auto-filled codes, validation, and batch submission.

Get Started Free Already have an account? Sign in