Think your prior approval follows you when you switch insurance? Think again.
A preauthorization is tied to the plan that issued it, so it usually dies the day your old policy stops.
This is where people get burned.
That means scheduled tests, surgeries, and high-cost drugs can be delayed or billed to you unless the new insurer issues a fresh OK.
This post explains what typically happens to preauthorizations after a coverage change, the rare exceptions that can buy you time, and the exact steps to take now to protect your care and your wallet.
Understanding What Happens to Preauthorizations When Coverage Changes
A preauthorization is your insurer’s approval for a specific treatment, test, or procedure before it happens. When your insurance changes, that approval is tied to the plan you had at the time. It becomes void the moment your old policy ends.
The new insurer starts fresh. Even if your previous plan approved surgery, physical therapy, or imaging, the new insurer reviews the request under its own rules, network restrictions, and medical necessity criteria. That approved MRI from last month? It doesn’t follow you to the new plan. The approval letter itself includes effective dates that align with the issuing plan’s coverage period. Once that window closes, so does the authorization.
If you switch jobs, drop an individual plan, or move from Medicaid to private insurance, any pending or scheduled services need fresh authorization from the new insurer. Treatment continuity isn’t guaranteed by old paperwork. Your provider must submit a new request (complete with codes, clinical justification, and member information) to the new insurer. The review starts from scratch.
What immediately happens on the coverage switch date:
- Old preauthorization reference numbers and approval letters no longer bind the new insurer.
- Scheduled procedures or tests risk denial if the new insurer hasn’t reviewed and approved them.
- Provider billing and scheduling hold until the new insurer issues written confirmation.
- You may be financially responsible if services proceed without the new insurer’s approval.
Exceptions and Rare Cases When an Authorization Might Carry Over
A small number of insurers and state laws offer temporary transition of care or continuity of care provisions for patients already receiving ongoing treatment. These aren’t automatic, and they’re not universal. You have to ask for them, prove ongoing care is medically necessary, and meet narrow eligibility windows (often between 30 and 90 days depending on the insurer and the type of treatment). Common examples include chemotherapy cycles, pregnancy and prenatal care, post surgical follow up visits, and chronic condition infusions.
Even when a new insurer agrees to honor prior approvals temporarily, it’s usually limited to a specific provider and a defined number of visits or doses. You’ll still need to submit a full reauthorization request during that window. The temporary carryover only bridges the gap. It doesn’t replace the new insurer’s full review process.
Some employer sponsored plans and a few state insurance laws require short transitional periods for active treatment. But these protections are conditional and almost always require written documentation of the existing treatment plan, diagnosis codes, and a request submitted within days of the coverage start date.
Conditions typically needed for a temporary carryover:
- Treatment was approved and actively underway before the coverage change (not just planned).
- A written request for continuation is submitted to the new insurer within the first 5 to 10 business days of the new plan’s effective date.
- The provider or facility were in network under the old plan, and the new insurer agrees to treat them as in network temporarily.
Timelines and Deadlines After Switching Insurance Plans
Insurers vary, but most standard prior authorization reviews take between 7 and 14 calendar days once the request is submitted. If the new insurer classifies your request as urgent or expedited, expect a decision within 24 to 72 hours. Complex cases (especially those requiring peer to peer reviews, outside medical consultations, or additional documentation) can stretch to 30 days or more.
Missing a reauthorization deadline can force you to delay care or pay out of pocket and file a retrospective appeal. Appeals themselves follow their own timelines. Internal appeals for standard denials commonly allow 30 to 180 days for you to file, and the insurer typically has 30 to 60 days to decide. Urgent appeal decisions are usually required within 72 hours.
The clock starts the moment the new insurer receives a complete request (provider signature, CPT and ICD 10 codes, medical records, and member ID). Incomplete submissions reset the timeline. If your procedure is scheduled two weeks out and the insurer hasn’t responded in 10 days, you’re running into the window where treatment may need to be postponed or financial responsibility shifts to you.
| Timeline Stage | Typical Duration | Notes |
|---|---|---|
| Urgent/expedited review | 24–72 hours | Requires clinical documentation showing imminent risk or worsening condition. |
| Standard review | 7–14 calendar days | Most common timeline for elective procedures, imaging, and outpatient therapies. |
| Complex or peer review | Up to 30 days | Applies to high‑cost drugs, experimental treatments, or cases needing specialist input. |
| Internal appeals (standard) | 30–60 days for decision | Filing window for appeals often 30–180 days after denial; varies by plan and state. |
Steps Patients Should Take to Avoid Treatment Gaps
Contact your new insurer within one business day of the coverage effective date. Don’t wait for a welcome packet or ID card in the mail. Call the member services number, explain that you have a procedure or treatment requiring prior authorization, and ask for the submission process, required forms, and expected decision timeline.
Next, call your provider’s office. Give them your new insurance information, the date coverage started, and any authorization reference numbers or approval letters from the old plan. Ask them to submit a new prior authorization request immediately, including CPT codes, ICD 10 diagnosis codes, clinical notes, and any letters of medical necessity they sent to the old insurer. Providers often handle submissions, but you’re the one who will bear the financial risk if it’s delayed or incomplete.
- Confirm the exact date your old insurance ended and your new coverage began.
- Request written confirmation of the old preauthorization, including the authorization number, service dates, and expiration.
- Provide the new insurer with copies of the prior approval letter, diagnosis codes, and planned procedure codes.
- Ask the new insurer if they offer any transition of care protections and what documentation is required.
- Coordinate with your provider to delay elective procedures until the new authorization is confirmed in writing.
- Keep a log of every call: date, time, representative name, reference number, and what was promised.
If the service date is less than two weeks away, request an expedited review. Most insurers have formal expedited tracks, but you or your provider must explicitly ask and provide clinical justification. “Patient will experience significant pain or functional decline without timely treatment” works better than “It’s already scheduled.”
Special Situations: Emergencies, Ongoing Treatment, and High Cost Drugs
Emergency services bypass prior authorization entirely. If you’re having a heart attack, stroke, severe allergic reaction, or any life threatening condition, the hospital will treat you first and the insurer reviews coverage after stabilization. Prior authorization can’t be required before emergency care, and insurers can’t deny emergency claims solely because you didn’t get advance approval.
But “emergency” has a specific definition. A same day urgent care visit for flu symptoms or a scheduled scan for chronic back pain won’t qualify. Once you’re stabilized and admitted for ongoing inpatient care, the hospital or your provider must notify the new insurer and secure authorization for continued treatment. If that doesn’t happen, you may face denials for the non emergency portion of the stay.
High cost specialty drugs and biologic medications almost always require strict prior authorization and step therapy protocols, even if your old plan approved them for months or years. The new insurer may require you to try cheaper alternatives first, submit updated lab results, or demonstrate that prior therapies failed. Expect reauthorization timelines of 7 to 14 days for these drugs. If you’re mid cycle on a medication, ask your prescribing provider to request a one time emergency fill while the new authorization is processed.
Cases needing urgent reauthorization:
- Scheduled surgeries within 10 to 14 days of the coverage change date.
- Ongoing chemotherapy, radiation, or biologic infusions with sessions planned in the first month of the new plan.
- Prescription specialty medications with no generic alternative and a retail cost exceeding $1,000 per month.
Final Words
When you change insurers, approved authorizations almost always end on the old policy’s last day. You’ll usually need a new prior authorization, and processing can take anywhere from a day to a few weeks.
There are narrow exceptions for things like chemotherapy or pregnancy care, but they’re temporary and need fast paperwork. Call both insurers and your provider, submit medical records early, and ask for expedited review if treatment is urgent.
To answer what happens to preauthorizations when insurance changes: most don’t transfer, so plan ahead and you’ll cut the risk of treatment delays.
FAQ
Q: Do prior authorizations transfer to new insurance?
A: Prior authorizations generally do not transfer when you switch insurers; most approvals end on your old policy’s termination date, and the new insurer usually requires a fresh review and authorization.
Q: Does omeprazole require prior authorization?
A: Whether omeprazole needs prior authorization depends on your plan; generic prescription forms often don’t, but some insurers require authorization for brand names, high-dose, or long-term use, so check your drug formulary or ask the insurer.
Q: Does Mounjaro require prior authorization?
A: Mounjaro usually requires prior authorization because it is high cost and often subject to step therapy or clinical criteria; expect requests for diagnosis, prior treatments, and relevant measures like BMI or A1C.
Q: Does sildenafil require a prior auth?
A: Sildenafil may or may not need prior authorization; generic erectile dysfunction prescriptions often don’t, but brand products, higher doses, or uses like pulmonary hypertension can trigger prior authorization, so check your plan.
