An official website of the United States government
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

News | April 19, 2022

Pre-Authorization and Medical Necessity for Prescription Drugs: What You Need to Know

By TRICARE Communications

Prescription drugs are tools meant to support your overall health. TRICARE has procedures to make sure you get the right prescription drug to treat your condition. You must sometimes work with your doctor to get approval for coverage of certain drugs. Two examples of this are pre-authorization (also known as prior authorization) and medical necessity.
 
“TRICARE uses pre-authorization and medical necessity to make sure your prescription drug is safe, effective, medically necessary, and cost effective,” said U.S. Public Health Service Cmdr. Teisha Robertson, a pharmacist with the Defense Health Agency’s Pharmacy Operations Division. “If you don’t get pre-authorization approval when it’s required, TRICARE may not cover your prescription. Without a medical necessity form, you’ll pay a higher cost for your prescription drug.”
 
Here are some facts about pre-authorization and medical necessity to help you through the process.
 
Pre-authorization
As outlined in the TRICARE Pharmacy Program Handbook, you may need pre-authorization for your prescription if it:  
Express Scripts, the TRICARE pharmacy contractor, sometimes needs more information from your doctor about your prescription before it can be covered by your plan. Express Scripts uses this information to help control costs. They also must make sure the medication is an effective treatment. Express Scripts works with your doctor on these reviews.
 
To find out if your prescription needs pre-authorization, you can go to the TRICARE Formulary Search Tool. Enter the name of your prescription drug in the search tool. If the drug requires pre-authorization, a form will be available for you to download by clicking “Coverage rules apply.” Otherwise, the form won’t appear.
 
Keep in mind, only your doctor can submit the form. They can do this online by following the instructions on the form. Express Scripts will update you on the status of your form. You can also log in to your Express Scripts account or Express Scripts mobile app at any time to check the status. Your approval will apply to network pharmacies, TRICARE Pharmacy Home Delivery, and military pharmacies.
 
Medical necessity
Some drugs require proof from your doctor of medical necessity. Your TRICARE plan has a list of generic and brand-name drugs that TRICARE covers. It’s called the formulary list. TRICARE also covers non-formulary drugs, but at a higher copayment. If evidence of medical necessity is approved for these drugs, you can get your non-formulary drug at the formulary cost, which will be a lower copayment. Medical necessity is also required for active duty service members to get the non-formulary drug at no cost.
 
How can you find out if your prescription drug needs medical necessity? You can find this by looking it up on the TRICARE Formulary Search Tool. As with pre-authorization, only your doctor can submit the form. Your medical necessity approval will apply to network pharmacies, TRICARE Pharmacy Home Delivery, and military pharmacies.
 
Keep in mind, coverage for some non-formulary drugs requires you to use home delivery. You can check the online search tool to confirm.
 
Find more information about pre-authorization and medical necessity on the TRICARE website. If you can’t find a form you need or have questions, reach out to Express Scripts.
 
Remember, you can always check the TRICARE Formulary Search Tool to see how much you’ll pay out of pocket for your prescriptions. You can also check out the TRICARE Pharmacy Program Handbook for everything you need to know about your pharmacy benefit.
 
Would you like the latest TRICARE news sent to you by email? Visit the TRICARE Subscriptions page today, and create your personalized profile to get benefit updates, news, and more.
 
Service member reaches into medicine cabinet at a military pharmacy
How to get prescriptions overseas with TRICARE
News
Jul. 15, 2026

If you live or travel overseas, you can still get your TRICARE-covered prescriptions. But the process works...
Read More
Service member reaches toward shelves in a military pharmacy
Make the most of your TRICARE Pharmacy Program b...
News
Jul. 15, 2026

Have you recently filled a prescription at a military pharmacy? If so, you may know that military pharmacies...
Read More
Dentist adjusts the light over a patient sitting in the dentist's chair.
TRICARE medical vs. dental coverage: understandi...
News
Jul. 07, 2026

It isn’t always clear whether a condition involving your mouth is covered under a TRICARE medical or dental...
Read More
"Patients needed on July 17 for a focus group discussion about substance use disorder. Sign-up deadline is July 6. Learn if you qualify;" TRICARE logo; a group sits in a semicircle while talking to one another.
Provide feedback on clinical practice guidelines...
News
Jul. 01, 2026

Living with a substance use disorder can present serious challenges. If you’ve been diagnosed with a substance...
Read More
Four service members stand in a military pharmacy.
Q&A: Understanding TRICARE coverage of weight lo...
News
Jun. 30, 2026

Do you live overseas? Your weight loss medication (including GLP-1 drugs) may now be covered by TRICARE. You...
Read More
Man and woman sitting next to each other while smiling at a laptop
How TRICARE For Life works with employer health ...
News
Jun. 25, 2026

Turning 65 means it’s time for Medicare. If you’re eligible for Medicare and TRICARE For Life, and also have...
Read More
Surgeons in scrubs and masks operating on patient.
6 military hospitals and clinics recognized as C...
News
Jun. 25, 2026

Defense Health Agency Director Vice Adm. Darin K. Via has formally established regional centers of excellence...
Read More
Service member examines the eye of another service member.
Keep an eye on your vision health with TRICARE
News
Jun. 23, 2026

About 11 million Americans over age 12 need vision correction, according to the CDC. Do you know if you’re one...
Read More

July 15, 2026

How to get prescriptions overseas with TRICARE

If you live or travel overseas, you can still get your TRICARE-covered prescriptions. But the process works differently overseas than it does in the U.S. It also depends on whether you’re traveling or if you live overseas permanently. Knowing your options ahead of time can save you stress, time, and money.

July 15, 2026

Make the most of your TRICARE Pharmacy Program benefit: How to use Q-Anywhere at military pharmacies

Have you recently filled a prescription at a military pharmacy? If so, you may know that military pharmacies have different procedures than civilian pharmacies. When a provider issues a new prescription to a military pharmacy, you need to activate the prescription before a pharmacist fills it. Recently, the Defense Health Agency updated its Q-Anywhere feature to make this prescription pickup process easier and more convenient.

July 7, 2026

TRICARE medical vs. dental coverage: understanding key differences

It isn’t always clear whether a condition involving your mouth is covered under a TRICARE medical or dental plan. Knowing which plan to use can help avoid unnecessary costs or delays in care.

July 1, 2026

Provide feedback on clinical practice guidelines in joint patient focus groups: substance use disorder on July 17

Living with a substance use disorder can present serious challenges. If you’ve been diagnosed with a substance use disorder, the Defense Health Agency and Veterans Health Administration would like to hear your perspective on your treatment journey. Together, they’re hosting a virtual focus group on Friday, July 17 at 1 p.m. ET. This focus group offers patients the opportunity to share their experiences with diagnosis and treatment.

June 30, 2026

Q&A: Understanding TRICARE coverage of weight loss medications overseas

Do you live overseas? Your weight loss medication (including GLP-1 drugs) may now be covered by TRICARE. You must meet certain eligibility requirements. This article describes these requirements and helps you navigate the basics of getting GLP-1 drugs overseas.

June 25, 2026

How TRICARE For Life works with employer health coverage and Medicare

Turning 65 means it’s time for Medicare. If you’re eligible for Medicare and TRICARE For Life, and also have employer-sponsored coverage, there are some important decisions to make.

June 25, 2026

6 military hospitals and clinics recognized as Centers of Excellence

Defense Health Agency Director Vice Adm. Darin K. Via has formally established regional centers of excellence to deliver premier specialty care supporting critical warfighting capabilities. Emerging in response to the National Defense Authorization Act for Fiscal Year 2023, the new Specialty Care Centers of Excellence are designed to enhance warfighter medical readiness and improve healthcare quality for all Military Health System beneficiaries, aligning with Via’s Lines of Effort to reinforce DHA as a combat support agency.

June 23, 2026

Keep an eye on your vision health with TRICARE

About 11 million Americans over age 12 need vision correction, according to the CDC. Do you know if you’re one of them? Getting routine eye exams to monitor your eyesight can help detect and prevent eye diseases early.

June 18, 2026

Find a TRICARE provider near you

The first step in getting healthcare is to know where to go. TRICARE has many resources to help you find the right healthcare provider for you and your family. Depending on your plan, you’ll get care from a military hospital or clinic or a civilian provider.

June 16, 2026

Moving with TRICARE: A game plan for success

When you move, keeping organized is key. Between the boxes and bubble wrap, take time to make sure your TRICARE benefits are ready to come along. Here are a few steps you can follow on your journey from getting ready to arriving at your new location.