Prior authorization
Prior authorization (PA) is a payer requirement that a clinician obtain approval before a specific drug, test, or procedure will be covered — a cost-control gate between the prescription and the pharmacy counter.
- Required before coverage applies, not before care can happen
- Concentrated in expensive drugs — GLP-1s are the current epicenter
- Denials are appealable and frequently overturned
- Electronic PA (ePA) is replacing fax-based workflows
How prior authorization works
The prescriber (or their staff) submits clinical documentation justifying the treatment against the payer’s coverage criteria; the payer or its PBM reviews and approves, denies, or requests more information. Denials can be appealed — and a large share of appealed denials are overturned, which tells you how much of the process is friction by design.
Electronic prior authorization (ePA) is steadily replacing fax-and-phone workflows, letting the request travel inside the e-prescribing flow — but turnaround still ranges from minutes to weeks depending on payer and drug.
Why PA dominates GLP-1 and specialty programs
Expensive drugs attract utilization management, and GLP-1s are the current epicenter: payers commonly require documented BMI thresholds, comorbidities, prior lifestyle interventions, or step therapy through older drugs before approving coverage. For a weight-care program, PA capability effectively decides whether “covered by insurance” is a real patient promise or a support-ticket generator.
Designing programs around PA
Cash-pay sidesteps PA entirely — one reason compounded and direct-priced offerings grew so fast. Hybrid programs should run benefit checks up front, set expectations before the visit, and build the documentation for likely PA criteria into the intake itself, so the clinical note supports the authorization on the first submission rather than the appeal.
Compliance handled, so you can build
Lithos runs the clinicians, pharmacies, and 50-state rules behind your care program — one API.
Frequently asked questions
Who submits a prior authorization?
The prescriber or their team, with clinical documentation. Well-built programs generate that documentation from the intake automatically.
How long does prior authorization take?
Anywhere from real-time ePA approval to a couple of weeks for manual review — and longer if a denial goes to appeal.
Does cash-pay require prior authorization?
No. PA is an insurance-coverage mechanism; a patient paying directly needs only a valid prescription.