What Is Prior Authorization — and Why Does It Matter So Much?
Prior authorization (PA) is one of the most frustrating — and most financially consequential — requirements in modern healthcare billing. It’s the process by which a healthcare provider must get approval from the patient’s insurance company before performing a specific procedure, prescribing a medication, or ordering a diagnostic test.
Miss an authorization, and you don’t get paid. Submit one incorrectly, and you face delays averaging 16 days per claim. According to the American Medical Association, physicians and their staff spend an average of 14.6 hours per week just managing prior authorization requests — time that could be spent on patient care.
For practices billing high volumes of complex services, prior authorization management isn’t just a billing task — it’s a revenue protection strategy. This guide explains how the process works, where it breaks down, and how TBC Solutions helps practices take control of it.
Which Services Typically Require Prior Authorization?
Prior authorization requirements vary by payer and plan, but certain service categories almost universally require it:
- Surgical procedures — Most elective surgeries, especially orthopedic, cardiac, and spine procedures
- Imaging — MRI, CT scans, and PET scans frequently require prior auth from commercial payers
- Specialty medications — Biologics, oncology drugs, and high-cost brand medications
- Durable medical equipment (DME) — Wheelchairs, CPAP machines, home infusion equipment
- Mental health and substance use — Inpatient psychiatric admissions, intensive outpatient programs, residential treatment
- Physical and occupational therapy — Visit limits enforced through authorization cycles
- Home health services — Skilled nursing, home health aide, and therapy services at home
- Interventional cardiology — Catheterizations, stent placements, ablations
Why Prior Authorization Denials Happen
Denials related to authorization fall into several categories, most of which are preventable:
No Authorization Obtained
The most straightforward — and costly — failure. The procedure was performed, the claim was submitted, and the payer denied it because no authorization was ever requested. This happens most often when scheduling staff assume authorization is not required, or when a service is added during a procedure without checking payer requirements.
Authorization Does Not Match the Procedure Performed
An authorization is obtained for procedure code 27447 (total knee arthroplasty), but the surgeon also performs a 27570 (manipulation under anesthesia) that wasn’t authorized. Even though one procedure was covered, the entire claim or the unauthorized portion is denied.
Authorization Expired
Most authorizations are valid for 90 days, though some payers issue 30-day windows. If a procedure is rescheduled and pushed past the auth expiration date, the claim will be denied without a new authorization — even if the original one was valid.
Medical Necessity Not Established
Payers use their own clinical criteria (often Milliman or InterQual guidelines) to determine medical necessity. If the clinical documentation doesn’t clearly support those criteria — for example, not documenting failure of conservative treatment before requesting an MRI — the authorization will be denied on medical necessity grounds.
Wrong Level of Care
Inpatient vs. observation status, skilled nursing vs. home health — payers frequently approve a lower level of care than the physician ordered. Accepting the lower-level approval without appealing often means the facility or practice bills at the wrong level and faces significant underpayment.
The Prior Authorization Appeal Process
When a prior authorization request is denied, practices have the right to appeal. Most appeals go through three levels:
- Level 1 (Internal Appeal) — Submit additional clinical documentation directly to the payer’s medical review team. This resolves most authorization denials when the initial submission was incomplete.
- Level 2 (External Review) — An independent review organization (IRO) evaluates the clinical necessity. Payers are typically bound by the IRO’s decision.
- Peer-to-Peer Review — The treating physician speaks directly with the payer’s medical director. This is often the fastest and most effective path to overturn a medical necessity denial.
The key to successful appeals is speed — most payers have strict timelines (10–30 days) for submitting appeals, and missing the window forfeits your right to appeal entirely.
How a Billing Partner Reduces Prior Authorization Burden
Managing prior authorizations in-house requires dedicated staff, up-to-date payer policy knowledge, and rigorous tracking systems. For most practices, this is a full-time function. Outsourcing to TBC Solutions provides:
- Proactive auth submission — We submit authorization requests as soon as procedures are scheduled, not the day before
- Payer-specific criteria matching — We know what each payer’s reviewers look for and structure clinical summaries accordingly
- Auth tracking dashboard — Every pending, approved, and expiring authorization is tracked so nothing falls through the cracks
- Denial appeal management — We initiate appeals immediately, with clinical documentation packages tailored to each payer’s review criteria
- Peer-to-peer scheduling — When needed, we coordinate physician-to-medical-director calls to overturn complex denials
The Cost of Getting Prior Authorization Wrong
The financial impact of poor prior authorization management compounds quickly. Consider a practice that performs 50 procedures per month requiring authorization, with an average reimbursement of $3,000 per procedure:
- A 10% auth failure rate = 5 denied claims per month
- At $3,000 each = $15,000 in monthly lost revenue
- Over 12 months = $180,000 written off — often without practices realizing the root cause
Effective prior authorization management isn’t a nice-to-have. It’s a core revenue protection function.
Take Control of Your Prior Authorization Process
If your practice is losing revenue to authorization denials, TBC Solutions can help. Our dedicated authorization management team handles the entire lifecycle — from initial submission through appeal resolution — so your clinical team can focus on patient care.
Schedule a free consultation today. You can also learn more about our comprehensive Revenue Cycle Management services and how we reduce denials through expert medical coding.