After-hours billing in Alberta — premiums most physicians miss

Alberta SOMB provides after-hours premiums for encounters outside regular clinic hours. Most physicians know they exist — but routinely miss applying them.

The most common reason is simple: billing is often done the next morning, when the time context is lost. This page covers the time bands, eligibility rules, and common mistakes so you can capture what you've earned.

Alberta after-hours time bands

SOMB defines distinct time bands with different premium levels. The encounter start time determines which band applies:

Which codes qualify for after-hours premiums?

Not all SOMB codes are eligible for after-hours premiums. Eligibility depends on the code category and the specific modifier rules. Generally:

• Office visits and consultations — most are eligible for after-hours premiums
• Emergency department encounters — eligible, and this is where the largest volume of missed premiums occurs
• Hospital visits — eligible in most cases
• Procedures — eligibility varies; some surgical codes have their own after-hours provisions
• Diagnostic and lab codes — generally not eligible for after-hours premiums

Common after-hours billing mistakes

1. Not billing the premium at all

This is the most frequent error. The physician works an evening or weekend shift, bills the base encounter codes, and doesn't apply the after-hours modifier. Over a year of on-call coverage, this adds up to a meaningful amount of uncaptured revenue.

2. Applying the wrong time band

A shift that starts at 16:30 and runs to 23:30 spans two time bands — regular hours and evening for early encounters, evening and night for later ones. Each encounter should be billed using the time band that applies to when that specific encounter started.

3. Applying night premiums to secondary procedures

When multiple procedures are performed during a single after-hours encounter, the after-hours premium typically applies to the primary procedure or visit code. Applying it to every code in the encounter may create audit exposure.

4. Missing statutory holiday premiums

Statutory holidays qualify for the weekend/holiday premium rate, but physicians sometimes forget to check whether a given date is a statutory holiday — especially for less obvious holidays like Heritage Day or Family Day.

How to capture after-hours premiums reliably

• Record the encounter start time in your chart notes — not just the date
• Review on-call and evening clinic encounters specifically for time-band eligibility
• Use a structured review tool that flags after-hours modifier opportunities based on encounter timing
• Check statutory holiday calendars when billing for holiday encounters