What Is a 503B Compounding Pharmacy?
A 503B compounding pharmacy — formally an outsourcing facility — is a compounding operation registered with the FDA and held to federal manufacturing rules. The category was created by the Drug Quality and Security Act of 2013.
The short answer
"503B" refers to section 503B of the Food, Drug, and Cosmetic Act (21 U.S.C. §353b). A facility that registers under it may compound drugs without patient-specific prescriptions, subject to the section's conditions, and in exchange must follow current Good Manufacturing Practice (CGMP) and submit to FDA inspection. Registration is not an approval of any drug the facility compounds.
What a 503B registration requires
- Registration with FDA as an outsourcing facility.
- Compliance with CGMP — the federal manufacturing quality standard.
- FDA inspection on a risk-based schedule.
- Adverse event reporting and other reporting duties set by §503B.
- Restrictions on bulk drug substances, tied to FDA's 503B bulks list and the statute's other conditions.
The statute lists further conditions and exceptions; the linked sources are authoritative.
Why "503B" appears on vendor and clinic pages
- Some compounders market 503B status as a quality signal. It describes a regulatory pathway and its oversight — not a grade of any specific product.
- Healthcare practices may obtain office-use stock from registered outsourcing facilities where law permits.
- A compound made at a 503B is still a compounded drug, not an FDA-approved drug.
How to check whether a facility is really a registered 503B
- Open FDA's registered outsourcing facilities list — it is the authoritative, FDA-maintained list.
- Match the legal entity name, not just the brand or DBA. Marketing names can differ from the registered entity.
- For state license standing, check the state board of pharmacy where the facility is located.
We do not publish our own facility list yet — our registry holds no facility records. When it does, each entry will carry its sources. Until then the FDA list is the primary source, and our facility lookup routes names straight to it.
Sources
Information only. Not medical or legal advice. Statutory summaries do not restate every condition; read the linked primary sources before relying on a pathway determination.