How to fax your health or car insurance company

Use the fax number printed on the claim or appeal form (insurers use different numbers for claims, appeals and prior authorizations), add your policy or member ID to every page, and keep the delivery receipt as proof of the date you filed.

How to send it

Find the right fax number on the form, your denial letter or the member portal.
Write your member or policy ID and claim number on every page.
Add a cover page saying what the fax is (claim, appeal, medical records) and how many pages.
Send it and save the receipt. Appeal deadlines are strict, and the receipt shows exactly when it arrived.

Tips so it isn’t rejected

Prior authorizations are usually faxed by your doctor’s office, not by you.
Use the fax number printed on your form, notice or letter. Agencies use different numbers for different forms and regions.

Faxing somewhere else?

How to fax a form to the IRSWhich IRS forms you can fax, where to find the right number, and how to send it online for $2.99.
How to fax the Social Security officeWhat SSA accepts by fax, how to find your local office’s fax number, and how to send it with proof of delivery.
How to fax medical records or a records requestSend medical records, referrals or a records request to a clinic, hospital or specialist without a fax machine.
How to fax documents to the unemployment officeSend ID verification, wage records or appeal documents to your state unemployment office by fax.
How to fax documents to the SNAP (food stamps) officeSend verification documents for SNAP, Medicaid or other benefits to your county or state office by fax.
How to fax a form to an employer or HRSend signed HR forms, applications or doctor’s notes to an employer’s fax number.