Have you ever had a claim denied simply because approval was not obtained before the patient walked in? It happens across US practices every single day. Authorization in medical billing is the process insurers use to approve services before or, in some cases, after they are delivered. When managed well, it protects reimbursement. When mismanaged, it creates denials that are difficult to overturn and revenue that is rarely recovered.
The AMA reports that physicians now complete nearly 40 prior authorizations per week. In fact, nine in 10 physicians (93%) say authorization delays have negatively impacted their patient care. So what is authorization in medical billing, and how does the process help in the revenue cycle of your practice? Let’s understand.
What is authorization in Medical Billing, and why does it directly impact Claim Approval
Authorization in medical billing is an important process that involves taking an authorization or approval from the healthcare or medical insurance service provider regarding the medical service or session that needs to be taken. The main goal is to inform and get confirmed approval that the insurance claim for the necessary medical service will be provided.
In most cases, if the authorization for medical billing is not performed, the insurance company has the right to deny or reject the claim, which can result in the patient paying the full cost of the medical treatment or service.
This authorization process also directly impacts the claim approval process:
- 90% of the doctors agree that prior approval slows down patient care.
- Incorrect prior authorizations can result in a 20% delay in reimbursements.
- Moreover, errors in eligibility and authorization can result in 35% of the claim denials.
Thus, ensuring an accurate and optimized authorization in medical billing is necessary to boost the claim acceptance rate.
Types of Authorizations in Medical Billing Used by Insurance Providers
In medical billing, the authorization for claims can be of different types, depending on the urgency of the treatment, the type of medical care required, the healthcare service provider, etc.
Prior authorization (pre-authorization) in Medical Billing
A healthcare RCM specialist, ‘Gett Johnson,’ said that, “Prior authorization increases collection and reduces denials. “It also helps healthcare providers to enhance their focus on patients.”
Prior authorization—also called pre-authorization or pre-cert—is the most common and most operationally demanding type. It requires the provider to obtain approval from the insurer before the service is delivered. The insurer reviews clinical documentation, applies its medical necessity criteria, and either approves, modifies, or denies the request.
But how does prior authorization work in practice? Here’s the workflow:
- The provider submits a request — including CPT codes, diagnosis codes, clinical notes, and supporting documentation — typically by phone, fax, or through the payer’s online portal.
- Turnaround times vary by payer and urgency, ranging from 24 hours for urgent cases to 10–14 business days for non-urgent elective procedures.
Concurrent authorization During Ongoing Treatment
Concurrent authorization applies to ongoing or inpatient care—situations where treatment is already underway, and continued coverage must be approved in real time. This type is most common in hospital inpatient settings, intensive outpatient programs, and skilled nursing facilities. The insurer’s utilization review team evaluates whether continued treatment remains medically necessary, typically on a daily or per-episode basis. Missing a concurrent review window can result in the denial of coverage for days of care already delivered.
Retrospective authorization for Emergency Cases
Retrospective authorization, also called post-service authorization, is requested after a service has already been delivered, typically because the clinical situation was urgent and there was no time for prior approval. Most payers allow a defined window, commonly 24 to 72 hours after the emergency encounter, for retrospective authorization requests. Outside that window, the claim is typically denied. Practices that handle emergency care must have a clear protocol for initiating retrospective authorization requests promptly after every unplanned admission or emergency procedure.
Referral-Based authorization for Specialist Care
Referral authorization is a specific subtype used primarily by health maintenance organizations (HMOs) and some preferred provider organizations (PPOs) plans, where a patient must obtain a referral from their primary care physician before seeing a specialist. The referral generates an authorization number that must appear on the specialist’s claim. Billing without a valid referral authorization—or with an expired one—results in denial.
How Does Prior Authorization Work in Medical Billing Step-by-Step
Here’s a step-by-step process of how prior authorization works in medical billing:
Identification of the Medical Services Required:
At first, a detailed analysis of the patient’s insurance plan and the CPT details mentioned are verified and confirmed. The eligibility of the patient for the claim is also validated.
Collection of the Documents:
All the necessary and supporting documents, including the test results, doctor’s note, and treatment history, are collected.
Authorization Request Submission:
Finally, the request for medical billing authorization is submitted, whether online, telephonically, or through email or fax.
Request Follow-up:
The authorization request is followed up on regularly before the scheduled medical service.
Authorization Number Tracking:
After the approval is received, the details of the approval, including the CPT codes, authorization number, etc., are recorded and updated in the billing system.
Verification of the Authorization at the Time of Medical Procedure:
The validity of the authorization is again verified when the medical service is about to be availed.
Adding Authorization Details in the Claim:
The complete authorization details, along with the number, are added to the claim form
Services That Commonly Require Authorization in Medical Billing
It is not necessary that for every medical treatment or service you will be required to follow the authorization medical billing process. Here are some of the most common services that require authorization:
High-Cost Procedures and Surgeries
Major surgeries like transplants, orthopedic surgeries, and cardiac procedures, which often require high-cost medical services, require authorization.
Diagnostic Imaging and Lab Tests
Advanced imaging services like MRI, CT, and PET scans require authorization because of their high use and cost.
Specialty medications and behavioral health services
Behavioral health treatments, like therapies, psychiatric treatment, and counseling sessions, mostly require authorization. Similarly, to ensure cost management for several medications, authorization is mandatory.
Why authorization in Medical Billing Has High Denial Rates
Although most patients perform medical billing authorization with utmost precision, many of them still experience denial in claim approvals. Here are some of the common reasons:
Missing Pre-authorization Before Service Delivery
Most healthcare insurance service providers demand prior authorization before the medical procedure takes place. Thus, a failure in receiving prior authorization can result in claim denial.
Medical Necessity Not Properly Documented
The necessity of the medical service or treatment should be clearly documented and communicated along with the supporting doctor’s prescription, recommendations, and urgency. If the necessity is not properly documented, the claim might get rejected.
authorization Validity Expired Before Treatment
Once you receive the authorization for a medical service, it should be utilized within the defined time frame or its validity. Availing the treatment after the authorization validity has expired can result in the claim denial.
Incorrect CPT Codes or Mismatched Service Details
Any discrepancy or errors in the CPT codes or a wrong service detail can impact the claim approval process, resulting in rejection or a delay in the approval.
Common Authorization Workflow Challenges in Medical Billing Teams
Although the authorization process follows a structured approach, it does come with certain workflow challenges:
Manual Processes and Administrative Delays
Most healthcare insurance payers have adopted automated workflows, but still many of them are dependent on manual workflows for approvals, error checks, etc. This can cause administrative delays.
Complex and Changing Payer Guidelines
The authorization policies can change frequently, and many times without any prior notification. If the workflows are not optimized according to the changing requirements, the medical billing can become difficult.
Lack of Real-Time Authorization Tracking
Without a centralized monitoring system, patients and healthcare providers might struggle to track approvals, denials, and pending authorization requests.
Best Practices to Reduce Authorization Denials in Medical Billing
To achieve optimized authorized medical billing, such that there are reduced claim denials and improved revenue cycles, here are some best practices that should be followed:
Early Insurance Verification and Benefit Checks
Verify the patient’s eligibility and the benefits according to the insurance claim taken and the medical service required.
Accurate Documentation and Coding Submission
Keep a check that all the necessary documents are available and have accurate details regarding the medical service required, CPT codes, doctors’ notes, urgent needs, lab results, etc.
Proactive Follow-Ups with Insurance Companies
To ensure the authorization process completes quickly, perform consistent follow-ups with the medical insurance provider.
Monitoring Authorization Limits and Renewals
After the authorization is received successfully, check its eligibility and ensure that your medical procedure is performed within the authorization limits. Also, check the conditions of the renewal process, if the procedure is performed beyond the authorization limits.
How Authorization in Medical Billing Affects Revenue Cycle Performance
Even a small error or misalignment can result in a lapse in authorization in medical billing and ultimately have an impact on your revenue cycle. Here’s how authorization failures affect revenue cycle performance:
| Authorization Failure | Revenue Cycle Impact |
| Missing prior authorization | Immediate denial; retroactive recovery is rarely possible |
| Expired authorization at the service | Denied claim; reauthorization required before resubmission |
| Wrong CPT code on authorization | Mismatch denial; corrected auth needed before billing |
| Session limit exceeded | Post-limit services denied; payer will not reconsider |
| Late retrospective request | Emergency services denied; patient billing may be the only option |
Thus, utilizing authorization practices that have a structured workflow and allow requests submission, tracking, monitoring, and follow-ups in real time can improve the revenue cycles. Such as, you can observe a shorter AR cycle, decreased denial rates, and increased net collection ratios.
How CEC Optimizes Authorization in Medical Billing for Faster Approvals
Authorization in medical billing demands a proactive approach to monitor workflow, documentation, follow-ups, and claim approvals. At CEC, we deliver efficient authorization management services that ensure successful approvals:
- We perform eligibility checks, verification of compliance requirements, document validation, and industry-specific rules for each payer.
- Our centralized real-time tracking can help in tracking the authorization status, validity limits, and CPT codes.
- We provide expert documentation support to make sure all the necessary documents are attached to the authorization requests.
- Our team of experts performs consistent follow-ups with the medical insurance payers to meet the medical service timelines.
- In case of any denials, our experts’ work will provide consistent support in analyzing the root cause of the rejection or denial and report it with corrections.
If authorization denials are a consistent problem in your practice, CEC can help you build the workflow to fix it.
Conclusion
Managing authorization in medical billing correctly is one of the highest-leverage actions a practice can take to protect its revenue. From understanding what authorization is in medical billing and the different types of authorization in medical billing to knowing how prior authorization works step-by-step. These practices, when performed accurately, can lower denial rates, shorten AR cycles, and strengthen cash flow.
Connect with CEC today to schedule a complimentary review of your authorization in medical billing processes and find out where your revenue is being lost.
FAQs
What do you mean by authorization in medical billing?
Authorization in medical billing can be defined as the process through which a patient seeks approval from the health or medical insurance provider regarding the approval for a medical procedure that needs to be taken by the patient.
What are the different types of authorization in medical billing?
Prior authorization (pre-service), concurrent authorization (ongoing inpatient care), retrospective authorization (emergency post-service), and referral-based authorization are the main types of authorization in medical billing.
What is the importance of prior authorization in medical billing?
Through prior authorization, the insurance company can verify the eligibility, claim details, and understand the medical necessity of the patient. This can help in knowing the required medical services are covered with the patient’s insurance plan and accelerate the approval process.