Prior authorization in medical billing: stopping the revenue loss

Why prior authorization denials cost so much

Most denials can be corrected. A wrong modifier gets fixed, a missing diagnosis gets added, a registration error gets updated and the claim goes back out. A service performed without a required authorization is different. The care has already been delivered, and the payer’s position is that it never agreed to pay for it.

For in-network providers, payer contracts usually make this the practice’s loss. The denial typically comes back as a contractual adjustment, which means you generally can’t bill the patient for it. So the revenue from the visit, procedure or scan is gone unless the payer can be persuaded to reverse itself.

Why missing authorization denials are hard to appeal

An appeal argues that the payer got something wrong. With a missing authorization, the payer usually got it right: the plan required approval, and no approval was obtained. The clinical merit of the service doesn’t change that.

Appeals in this category succeed mainly in narrower situations:

• An authorization existed but wasn’t attached to the claim, or was recorded under the wrong provider, location or date range. These are fixable, and they’re worth checking before anyone writes the claim off.
• The payer’s own records were wrong, such as a reference number given over the phone that never made it into their system. Call notes with the date, the representative’s name and a reference number are what win these.
• The service was urgent or emergent, where plans often have different rules.
• Authorization wasn’t actually required for that code or plan, and the denial itself was the error.

Outside those cases, recovery is unlikely. That’s why the effort belongs at the front end. Our claims and denial management work includes sorting the recoverable authorization denials from the ones that aren’t.

Building a front-end prior authorization workflow

A working prior authorization process starts at scheduling, well before billing sees anything. The steps:

1. Verify eligibility and benefits when the service is scheduled, and again shortly before the date. Plans change, especially at the start of the year.
2. Check whether authorization is required for that exact service, code and plan. Requirements differ by payer, by product within the same payer, and sometimes by place of service. Some plans route certain services, such as advanced imaging or therapy, to a separate benefit manager with its own portal.
3. Submit with complete clinical documentation. Most delays come from requests sent without the notes, imaging or treatment history the reviewer needs.
4. Record the approval in full: reference number, approved codes, number of visits or units, rendering provider, facility, and start and end dates.
5. Hold or reschedule services that don’t have an approval by the appointment date, under a clear policy your front desk can apply without guessing.
6. Check before the claim goes out that the billed codes, dates and provider match the approval.

The last step catches more than people expect. A procedure that changed during the visit, a patient moved to another location, or a different provider stepping in can each put a claim outside its authorization. Many payers allow an update within a short window after the service, but only if someone notices in time.

Tracking authorization expirations, visit limits and units

Getting the first approval is half of it. Ongoing care, such as therapy, behavioral health, infusions and some imaging series, runs on approvals that expire or run out.

• Track visits or units used against the number approved, updated at every visit.
• Alert ahead of the limit. Allow enough lead time for a renewal request and a payer decision, and set the threshold by payer based on how long their reviews actually take.
• Watch the end date as well as the count. An approval for twelve visits that expires after eight still expires.
• Re-check when the plan of care changes. A new body part, a new diagnosis or a change in frequency may need a new request.

This tracking has to be visible to the people scheduling. A spreadsheet in billing that the front desk never sees won’t stop the visit that goes past the limit.

Retro authorization: what to realistically expect

Retroactive authorization exists, but it’s narrower than many staff assume. Some payers accept a retro request within a short window for urgent or emergent services, or when the patient’s coverage wasn’t known at the time of service, such as when eligibility was added retroactively. Many payers don’t accept retro requests for scheduled, elective care at all.

Treat retro authorization as an exception process. If your practice relies on it regularly, the front-end workflow has a gap, and that gap is where the fix belongs.

What to automate in prior authorization, and what stays human

Parts of prior authorization are repetitive and rules-based, and those are good candidates for automation:

• Eligibility checks run automatically for every scheduled patient, days ahead.
• Authorization requirement lookups by payer, plan and code, using rules your team maintains.
• Status checks on pending requests, so nobody has to log into portals to see whether anything changed.
• Expiration and limit alerts generated from the tracking data.
• Pre-submission matching of claim lines against the approval on file.

Other parts need people: assembling the clinical case for a complex request, setting up peer-to-peer reviews between your provider and the payer’s reviewer, deciding whether to proceed when approval is pending, and explaining the situation to patients. Automation should clear the routine work so staff have time for those. Our billing automation page describes what we automate and what we leave to people.

Measuring your prior authorization process

Track authorization denials as their own category, split by payer, service and location. Look at how long requests take from submission to decision, and how many services were rescheduled for lack of approval. Those numbers show whether the workflow is holding and where it breaks.

If you want to know how much authorization-related revenue is sitting in your A/R, ask for a free A/R audit. We’ll break down your recent denials by root cause, and the findings are yours whether or not you work with us.