Prior authorization confirms, before a service is performed, that a payer will actually cover it.
When it’s missed, delayed, or filed incorrectly, the result is often a hard denial that’s difficult or
impossible to recover once treatment has already happened. Premium Medical Billing Solutions
manages the full prior authorization process for your practice, from determining what needs
approval through submission, follow-up, and peer-to-peer coordination.
Reviewed by our certified medical billing and coding team.
Prior authorization is a payer’s advance approval that a specific service, procedure, medication, or piece of equipment is medically necessary and covered under a patient’s plan. It’s required before the service is rendered, not after. Requirements vary by payer and by the specific plan a patient is enrolled in, which is why authorization needs are identified during eligibility verification, not assumed based on the procedure alone.
Once a payer approves the request, it issues an authorization number. That number has to be included on the claim submitted after treatment. Without it, or with an expired or mismatched one, the claim is at high risk of denial under a missing-authorization code (commonly CO-197), and there’s often little room to appeal after the fact.
We manage prior authorization requests with government and commercial payers, including Medicare Advantage plans, Medicaid, Cigna, Humana, and other commercial insurers, following each payer’s specific submission protocols. Authorization needs commonly arise around higher-cost or specialty services such as advanced imaging, durable medical equipment (DME), certain procedures, and specialty medications, though exact requirements always depend on the patient’s specific plan.
Prior authorization decision timelines aren’t purely a matter of individual payer discretion anymore. Under CMS’s Interoperability and Prior Authorization Final Rule (CMS-0057-F), effective January 1, 2026, impacted payers must decide within 72 hours for urgent requests and 7 calendar days for standard requests. The rule also requires these payers to state a specific reason when a request is denied, instead of a vague rejection.
It’s worth being precise about who this rule actually covers, since it’s a common point of confusion. CMS-0057-F applies to Medicare Advantage plans, Medicaid and CHIP fee-for-service and managed care programs, and Qualified Health Plans sold on the Federally Facilitated Marketplace. It does not apply to original/traditional Medicare fee-for-service, Medicare drug benefits, employer-sponsored commercial health plans, or plans sold on state-run exchanges. Timelines for those plans continue to be set by the individual payer or plan terms.
For services falling under CMS-0057-F, knowing the exact deadline matters practically: if a payer is running past its required decision window, that’s a legitimate point of escalation, not something to simply wait out. For services outside the rule’s scope, we track each payer’s stated turnaround and follow up accordingly.
(Learn more directly from CMS: CMS Interoperability and Prior Authorization Final Rule)
Managing prior authorization internally, without dedicated resources, tends to create problems that compound over time:
Prior authorization doesn’t operate in isolation. A missing or denied authorization is one of the more consequential denial types in medical billing, often a hard denial with limited recovery once the service has already been rendered. Our Denial Code Glossary covers this in more detail under CO-197, the code most commonly tied to a missing or invalid authorization.
Prior authorization also connects directly to other parts of the revenue cycle. Accurate medical coding ensures the authorization request matches what’s ultimately billed. Denial management resolves the cases where an authorization issue does result in a denial. Credentialing status affects which payers a provider can even request authorization from in the first place. And once approvals are in hand, our A/R management and reporting services help confirm that authorized services are actually being reimbursed on schedule.
If you want a clearer picture of how authorization gaps may be affecting your current denial rate, our free medical billing audit is a practical place to start.
Timelines depend on the payer. Under CMS's Interoperability and Prior Authorization Final Rule, Medicare Advantage plans, Medicaid/CHIP programs, and Marketplace Qualified Health Plans must decide within 72 hours for urgent requests and 7 calendar days for standard requests. This rule does not apply to traditional Medicare or most employer-sponsored commercial plans, which can range from a few days to a few weeks depending on the plan and service.
Common examples include certain medications, specific procedures, specialized tests, durable medical equipment, and treatments a payer considers non-standard or elective. Exact requirements depend on the patient's specific plan.
We manage the full administrative process, documentation, submission, follow-up, and peer-to-peer coordination when needed, while giving your staff daily visibility into where every request stands.
It confirms, before a service is performed, that a payer will actually cover it. Without it, a practice risks a large, often unrecoverable denial after the service has already been rendered.
Yes. Our processes are built to protect patients' protected health information throughout the authorization process.
No. CMS-0057-F applies specifically to Medicare Advantage, Medicaid and CHIP programs, and Marketplace Qualified Health Plans. It does not cover traditional Medicare, Medicare drug benefits, or most employer-sponsored commercial plans, so authorization timelines for those patients still depend on the individual payer.
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