Referrals, Preauthorization, and Predetermination
Key Takeaways
- A referral is usually a plan-required direction from a primary care provider to another provider or specialist.
- Preauthorization or precertification is payer review before service to confirm that plan criteria appear to be met.
- Predetermination is a prospective coverage review or estimate, often used when coverage is uncertain or a service may be considered elective or not medically necessary.
- Authorization approval does not guarantee payment because eligibility, coding, medical necessity, documentation, and claim edits still apply.
- The CBCS should track request dates, reference numbers, approved codes, units, service dates, provider, facility, and expiration dates.
For CBCS questions, referrals, preauthorization, notification, and predetermination are front-end revenue cycle controls. They happen before or around the service date so the office can prevent avoidable denials, warn the patient about possible responsibility, and document that payer rules were followed.
The most important exam habit is simple: do not treat these terms as synonyms. Payers use different words, but the CBCS should read the plan rule, confirm the exact requirement, document the result, and route unresolved issues before the patient is seen whenever possible.
The Terms Are Related, But Not Interchangeable
| Term | Typical Use | CBCS Focus | What It Does Not Prove |
|---|---|---|---|
| Referral | A managed-care plan requires the primary care provider to direct the patient to a specialist or service. | Confirm the referral exists, matches the specialist or facility, covers the diagnosis or service, and is valid for the visit date. | It does not automatically authorize every procedure the specialist might perform. |
| Preauthorization / prior authorization | The payer must approve a planned service before it is performed. | Submit or verify the request, track the status, record the approval number, dates, units, provider, facility, and approved code range. | It is not a guarantee of payment. Claim adjudication still depends on eligibility, coding, documentation, timely filing, and benefit rules. |
| Precertification | Often used for planned inpatient admissions, facility services, surgeries, or high-cost procedures. | Confirm the payer's specific precertification workflow and whether concurrent review is required after admission. | The word may mean different things by payer, so the office cannot rely on a generic definition. |
| Notification | The payer must be informed that a service or admission occurred or is planned. | Meet the required timing window, document the reference number, and escalate late or missing notice immediately. | Notification may not mean the payer reviewed medical necessity. |
| Predetermination | A prospective coverage review used when coverage is uncertain, often for elective or medical-necessity-sensitive services. | Request a written response when useful for counseling, documentation, or financial planning. | It is usually not binding and is not the same as a required prior authorization. |
A Practical Before-Service Workflow
- Verify active eligibility for the exact service date or expected service window.
- Identify the payer, plan type, network rules, coordination of benefits status, and payer order.
- Check whether the planned service requires a referral, authorization, precertification, notification, predetermination, or some combination of these.
- Match the requirement to the planned provider, facility, diagnosis, CPT or HCPCS code, place of service, units, date range, and medical record support.
- Submit the request through the required channel, such as a payer portal, clearinghouse tool, phone queue, fax form, or delegated utilization management vendor.
- Track pending requests until they are approved, denied, withdrawn, or returned for more information.
- Document the result in the account before the claim is submitted.
This workflow matters because authorization denials are often prevention problems, not easy appeal problems. If a plan required approval before service and the office skipped that step, the payer may deny even when the service was medically necessary.
What To Document
A strong authorization note should let a biller, coder, scheduler, collector, or appeal specialist understand exactly what happened without guessing.
Document the authorization or referral number, payer name, plan name, representative or portal reference, requested and approved codes, approved units, rendering provider, facility, date range, expiration date, and any limits or exclusions stated by the payer.
Also document what clinical records were sent, whether the request is still pending, whether additional information was requested, whether a peer-to-peer deadline exists, and who was notified when the payer denied or limited the request.
Common Exam Traps
- A referral from the primary care provider does not replace a payer authorization when the plan requires both.
- An authorization from the old insurance plan usually does not protect a service after the patient changes coverage.
- An approval for one facility may not apply if the procedure moves to a different facility.
- An approval for one date range may not apply after the service is rescheduled outside the approved window.
- An approval for one unit may not cover additional units performed during the encounter.
- A predetermination letter may help with counseling, but it should not be treated as guaranteed payment.
- Emergency care may have post-service notification requirements, so the office still needs to check the payer rule.
- Eligibility verification is necessary, but eligibility alone does not prove that a specific service is covered or authorized.
Scenario Walk-Through
A patient with an HMO plan is scheduled for an orthopedic specialist visit and possible MRI. The front desk confirms the patient is active on the plan, but that is only the first step.
The CBCS or authorization staff should confirm whether the HMO requires a primary care referral for the specialist visit. If it does, the referral must match the specialist, visit date, diagnosis or service type, and number of visits allowed.
The MRI may have a separate prior authorization requirement. The referral to orthopedics does not automatically authorize advanced imaging. Staff should confirm the MRI CPT code, diagnosis, ordering provider, imaging facility, and clinical documentation needed by the payer.
If the MRI is approved for one facility and the patient goes elsewhere, the claim may deny. If the MRI is approved for April but the patient reschedules into June after the authorization expires, the office may need an extension or a new request.
How To Answer CBCS Questions
When a question asks what the CBCS should do before service, choose the answer that verifies the payer requirement, obtains or confirms the required approval from the correct payer, and documents specific approval details.
When a question asks what to do after a denial for no authorization, do not jump straight to rebilling. Review the payer rule, the account documentation, the service date, the approved scope, and whether an appeal, retroauthorization, corrected claim, or patient communication is appropriate under policy.
The best answer usually protects the patient, follows payer rules, and keeps a clean audit trail. The weakest answer usually assumes that eligibility, a verbal patient statement, or medical necessity alone is enough.
A referral most commonly means which of the following?
Which detail is most important to document after obtaining prior authorization?
What is predetermination best described as?