05/15/2026
Most billers have never used POS 99.
Here's when you should.
When a service is rendered somewhere that doesn't fit any existing place of service code, you don't guess.
You don't force it into the closest option.
You use POS 99 - Other Place of Service.
That's exactly what it was created for.
Real examples where POS 99 is the right call:
- Medical adult day care centers
- Employer-sponsored wellness sites
- Community health fair settings
- Correctional facilities without a designated POS
What it is NOT:
❌ A substitute for POS 12 just because the patient is homebound
❌ A workaround when you're simply unsure
❌ Interchangeable with other codes that actually fit
One more thing, POS 99 is typically treated as a non-facility setting. That means the higher non-facility payment rate. Know that before you bill.
And before making it routine,
➡️ Call your MAC.
➡️ Document the call.
➡️ Rep name, date, reference number.
➡️ Every time.
The right POS code is the one that accurately describes reality.