503A or 503B? Choosing the Right Pharmacy Type for a Telehealth Program

Two kinds of compounder, built for different jobs

If you are setting up a telehealth or clinic program, two terms come up early: 503A and 503B. Both come from sections of the federal Food, Drug, and Cosmetic Act, and both describe places that compound medications. They are built for different jobs, and knowing which one your program needs makes the pharmacy conversation much easier. The two are not ranked against each other; they serve different needs.

What a 503A pharmacy does

A 503A compounding pharmacy prepares medications for individual patients, based on a prescription from a licensed prescriber. Each preparation is made for the person named on the prescription, at the strength the prescriber writes.

503A pharmacies are licensed and overseen primarily by state boards of pharmacy, and they compound to USP standards, including USP <795> for non-sterile preparations and USP <800> for hazardous drugs.

That patient-specific model is what makes direct-to-patient fulfillment work. The prescription names the patient, the pharmacy prepares it for that patient, and it ships to their door. Our explainer on what a 503A pharmacy is goes further into the rules.

What a 503B outsourcing facility does

A 503B outsourcing facility registers with federal regulators and follows current good manufacturing practice, the framework that governs drug manufacturers. Outsourcing facilities can prepare larger batches without a patient-specific prescription, which is why hospitals and practices use them for medications kept on hand and given in the office.

Which one fits a telehealth program?

Most telehealth and direct-to-patient programs prescribe for individual patients, one prescription at a time. That is the work a 503A pharmacy is designed for:

• Each prescription is made for a named patient, at the strength the prescriber writes.
• Strengths and bases can be adjusted patient by patient, including hypoallergenic bases and dye-free or filler-free options.
• Preparations ship directly to the patient, so your clinic does not hold medication inventory.
• Your prescribers stay in control of what is prepared for each patient.

A 503B outsourcing facility fits when a program needs stock on hand to administer in an office, rather than prescriptions shipped to patients. Some organizations use both, each for the work it is built for.

Questions to settle before you choose

• Will prescriptions be written for individual patients, or does the program need office stock?
• Which dosage forms do your protocols call for?
• Which states do your patients live in?
• How will prescriptions reach the pharmacy: a direct API connection, e-prescribing or a provider portal?

Our earlier post, eight questions to ask a compounding pharmacy partner, goes deeper on the last three.

Where ProCompounding fits

ProCompounding is a PCAB-accredited 503A compounding pharmacy in Johnson City, Tennessee, licensed in all 50 states and the District of Columbia. We compound non-sterile preparations for individual patients, with a 48-hour compounding time on most preparations; shipping time is additional.

See how direct-to-patient fulfillment works with us, or read our page on compounding fulfillment for telehealth clinics. When your team is ready, start clinic onboarding and tell us about your program.

Compounded preparations are not reviewed or approved by the FDA for safety or efficacy. This article is general information for clinics and is not legal or medical advice.