LetterAgent

Mail physical letters by just asking your AI assistant.


Status: LetterAgent is currently in private testing ahead of public launch. Everything on this page describes the service as it works today.

Home > Guides > Refills by fax

Can I request a prescription refill by fax?

Yes. A patient can send a refill request by fax to the pharmacy or the prescribing clinic, usually on a short form with your name, date of birth, and the medication details. This is different from faxing your own original prescription, which pharmacies generally will not accept from a patient. Requests still pass through a human at every step.

What is the difference between a refill and a renewal?

People use the two words interchangeably, but the pharmacy treats them as different jobs. The table below shows why the distinction decides who handles your request and how long it takes.

RefillRenewal
MeaningRefills remain on your existing prescriptionAll refills are used up or the prescription expired
Who authorizes itThe pharmacy, using the prescriber's original authorizationThe prescriber must issue a new prescription
Typical pathYou ask the pharmacy; they fill itThe pharmacy faxes a renewal request to the prescriber's office; staff queue it for the doctor
Where faxing fitsYou can fax the pharmacy a refill request formYour fax goes to the clinic, and it joins the queue with phone and portal requests
TimingSame day or next day in most casesDepends on the clinic; plan for a few days

What should the fax include?

Keep it short and machine-readable, because a person will read it once and key it in. Your full name and date of birth, the medication name, dose, and strength exactly as printed on your last bottle, the prescriber's name, and a phone number where the pharmacy can reach you. If you have one, include the prescription (Rx) number from the label: that is the fastest way for staff to find your record. Some pharmacies and mail-order services (Humana is one example) publish their own refill request fax forms on their websites; using their form instead of a free-text letter means your request lands in the right workflow instead of the general fax pile. A cover line that says "Refill request" helps too, since refill requests arrive in the same queue as prior-authorization forms and routine correspondence, and staff triage them by reading each one.

What slows these requests down?

Three things, mostly. First, missing details: a medication name without a dose forces someone to call you or the pharmacy back. Second, your request arriving while the prescriber needs more information: a doctor may want a recent visit or new bloodwork before renewing, and a fax cannot answer that, so the renewal stalls until you see them. Third, the queue itself: renewal requests are handled first-come, first-served alongside voicemails and portal messages, so faxing the day your bottle runs out is asking for a gap in therapy. The practical move is to request refills when you have about a week of medication left. One more distinction worth knowing: a patient requesting a refill by fax is fine; a patient faxing their own original prescription is not. Regulators in several provinces and states require the fax to come directly from the practitioner, because a patient-sent prescription copy cannot be authenticated and could theoretically be used at multiple pharmacies.

Related guides

Ready to fax it? Fax with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and it is sent.


LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.

Need help? Ask your assistant: it can check a job's status any time. If it ever can't handle something: hello@getletteragent.com

Privacy policy | Terms of service | Data processing