A US buyer looking at a pre-owned unit usually asks whether it is \”FDA approved\” and receives an answer that is either evasive or simply wrong. The question is badly framed. What matters is which configuration was cleared, what has been done to this unit since it left the original manufacturer, and whether the seller can document both. Those are three separate checks, and no listing badge settles any of them.

Three Different Questions Behind FDA Requirements

FDA requirements for used medical devices split into three questions: whether the model configuration has a clearance or approval, whether the work done on the unit changed its regulatory status, and whether the seller\’s description matches the device. A single \”FDA compliant\” statement answers none of them.

The first question is about the product. A clearance belongs to a manufacturer\’s device configuration, with a defined intended use, labeling and technology. The second is about activity. Servicing, refurbishment and remanufacturing are treated differently because they change different things. The third is about the transaction. A seller can describe a unit accurately, approximately, or not at all, and the buyer carries the consequences of accepting that description.

Procurement teams tend to collapse all three into a document check. That is where deals go wrong: a seller supplies a 510(k) number for the model, the buyer treats it as clearance for the unit, and nobody examines the service history or the installed software version. The table below separates what each question actually needs.

Clearance Belongs to the Configuration, Not the Unit

A 510(k) clearance attaches to a specific device configuration and intended use, held by a named manufacturer. A used unit does not carry its own clearance; it inherits the model\’s regulatory history only while its configuration, labeling and software remain within what was cleared.

That distinction matters because \”same model\” is a weaker statement than it sounds. Configurations can differ by model number, hardware revision, software version, accessories, and the labeling supplied with the device. A unit rebuilt with a different subsystem, or updated beyond the software version covered by the clearance, may no longer sit inside the configuration the manufacturer cleared. FDA does not issue per-unit certificates for used equipment, and no database record confirms the condition of a specific serial number.

For a buyer, the practical test is to compare three identifiers: the nameplate model and serial number, the software or firmware version reported by the device, and the model numbers listed in the clearance. If any of the three does not line up, the question moves from \”what does the database say\” to \”what changed, and who approved the change\”. That is a document question, not a search question.

What a 510(k) Does and Does Not Cover

A 510(k) records that a manufacturer demonstrated substantial equivalence to a legally marketed predicate device for a stated intended use. It is not a certificate of condition, calibration status or resale readiness, and it does not authorize changes to the cleared configuration.

The clearance is a premarket review outcome. It says the manufacturer provided the information FDA required to find the device substantially equivalent; it does not say the device performs correctly today, that consumables are included, or that a service agent followed the manufacturer\’s procedures. Devices that go through premarket approval carry a different record again, and some device types are exempt from premarket notification altogether. \”Cleared\”, \”approved\” and \”exempt\” are not interchangeable, and none of them means \”certified\”.

The database record is still useful. It identifies the applicant, the device name, the product code, the clearance date, and often the model numbers and a supporting summary. What it cannot tell you is whether the unit in front of you is the configuration described, whether its software was updated, or whether the seller\’s service history is complete. Those gaps are filled by the document pack, not by the database.

Servicing, Refurbishing and Remanufacturing: Where the Line Sits

Servicing keeps a device within its cleared configuration; remanufacturing changes it enough that FDA may treat the entity doing the work as the manufacturer. Refurbishing sits between them, and the label on the invoice does not decide which applies. The changes made to the device do.

FDA has written about these activities specifically because the vocabulary in the secondary market is loose. In broad terms, servicing maintains or repairs a device without significantly changing its performance, safety or intended use. Remanufacturing involves changes that do significantly affect those characteristics, which can bring premarket requirements back into play. Refurbishment is a commercial term, not a regulatory category; a refurbishment that replaces wear parts and verifies performance is a different act from one that installs a new subsystem or alters specifications.

The line is not academic. If a third party crosses into remanufacturing, the regulatory obligations may attach to that party rather than the original manufacturer, including design controls, labeling and complaint handling. For a buyer, the useful question is not \”was it refurbished\” but \”what was replaced, what was tested, and who concluded the device still matches its cleared configuration\”.

Documents to Request From a US Seller

The document pack is the only part of the transaction a buyer can examine before payment, and it should be requested as a set rather than negotiated item by item. Each document answers a different question, and the absence of one is information in itself. A seller who cannot produce a service history is not necessarily selling a bad unit, but the buyer is now underwriting an unknown.

Ask for the records below. Where a document is unavailable, record that fact in the deal file rather than accepting a verbal assurance; the gap becomes part of the acceptance decision and, where appropriate, part of the commercial terms or the decision not to proceed.

Records and checks: what to request, what each proves

For single-use devices, add the original labeling, the reprocessing status and a written statement that the buyer is responsible for confirming legality in their jurisdiction. HHG does not encourage the reuse or resale of single-use devices without that confirmation, and a recall or safety notice does not change the underlying labelling rules.

Using FDA Databases to Check a Model

The FDA medical device portal publishes the databases that are the right starting point for the model, not the endpoint for the unit. The 510(k) database, the PMA database and the recall database each answer a different question, and reading them well takes less time than reading them literally.

Start with the 510(k) database and search by applicant, device name or product code. Open the record and check the model numbers against the nameplate, not against the seller\’s title. Then check the PMA database for devices that go through the higher review path. Finally, search the recall database for the manufacturer and model; a recall history does not condemn a model, but it tells you which failure modes to ask about and whether the seller\’s unit falls within an affected lot or serial range.

Two limits matter. First, registration and listing records show that an establishment and a device listing exist; they do not certify a unit\’s condition. Second, a database entry is only as good as the identifiers you search with. If the listing title is garbled or the model number is missing, resolve the identity before drawing any conclusion from the search.

What Cannot Be Assumed From a Listing

A listing is a commercial description, not a regulatory record. Several claims that appear routinely in secondary-market listings cannot be assumed to be true for a specific unit, and some of them should not appear at all.

The following should never be inferred without documents: that the unit is FDA approved or cleared as an individual device; that it carries a CE mark or UKCA mark for the configuration being sold; that it is calibrated or performance-verified; that accessories, consumables or software licenses are included; that a single-use component can be reprocessed or resold; that the seller is an authorized distributor; and that any warranty exists. Each is a separate statement that needs its own evidence.

The practical response is to ask the seller to remove ambiguous wording and replace it with specific statements: model, serial number, software version, included accessories, the test performed, the date, and the entity that performed it. A seller who can do that is usually also able to supply the underlying records. A seller who cannot should be treated as an unknown quantity, however confident the listing sounds.

Recording the Verification

Verification is only useful if it is written down in a form someone else can audit. A one-page record attached to the purchase order, listing what was checked, what was received and what remained open, protects the buyer at acceptance and later at resale.

Record the make, model, serial number and UDI where available; the software or firmware version; the clearance or approval number checked and the date of the database search; the documents received and the documents missing; the decontamination status; and the name of the person who reviewed the pack. Add photographs of the nameplate, labels and included accessories. Where a gap was accepted, state why and who approved the acceptance.

This record is also the baseline for the first maintenance cycle. A biomedical team that inherits a unit with no verification file spends the first service visit reconstructing it, often at the buyer\’s cost. The same file supports resale later, because the next buyer will ask for exactly the documents listed above.

If you are assessing a US-market unit and want the document pack reviewed before payment, send the model, serial number and what you already hold to the HHG team. More guides on records, verification and refurbishment are in the Knowledge section.