USP 797 Compliance Checklist: Fingertip & Media Fill Testing

Revisions to the USP General Chapter 797 went into effect on November 1, 2023. More than two years later, many compounding pharmacies are still catching up.

With updated compounded sterile preparations (CSP) category definitions, new personnel competency structures and tighter monitoring schedules, a facility's internal checklist can easily fall short of regulatory requirements.

If you're building or auditing your own USP 797 compliance protocol, this checklist walks through what it should include, with a close look at two areas that facilities often neglect: gloved fingertip testing and media fill testing.

What Does a USP 797 Compliance Checklist Cover?

The revised United States Pharmacopeia (USP) Chapter 797, “Pharmaceutical Compounding—Sterile Preparations,” was published for comment on November 1, 2022, and it became official on November 1, 2023.

A complete USP 797 compliance checklist should include five core categories:

1. Facility and engineering controls: ISO Class 5 primary engineering controls (PECs), buffer rooms, anterooms and the secondary engineering controls that support them — each held to the ISO classification appropriate for the CSP categories being compounded
2. Personnel training and garbing: Documented, role-based training before anyone touches a compounding area, with garbing technique evaluated as its own competency
3. Environmental monitoring: Viable air sampling and surface sampling across classified areas, pass-throughs and equipment, at a frequency tied to each CSP category
4. Cleaning and disinfection: Defined agents, frequencies and documentation for each surface type
5. Documentation: Records that tie every test back to a specific person, date and result, because undocumented testing is functionally the same as no testing during an audit

The next two sections dig into the personnel-competency pieces that generate the most audit findings.

Personnel Competency: Gloved Fingertip and Surface Sampling

USP 797 fingertip lab testing verifies that a compounding technician's garbing and hand hygiene process leaves clean gloves. During the test, the technician presses the fingers and thumb of each hand onto an agar plate immediately after garbing, without applying alcohol to the gloves first. The plate is incubated and read for any bacterial or fungal growth, which are recorded as colony-forming units (CFUs).

Surface sampling works alongside fingertip testing but answers a different question: not whether a person's technique is clean, but whether the compounding environment itself stays under control. Contact plates or swabs are taken from defined sites (the interior of each ISO Class 5 primary engineering control, pass-through chambers and other high-touch surfaces in classified areas) and read against action levels that get stricter as the ISO classification gets cleaner (more than 3 CFU in ISO Class 5, more than 5 CFU in ISO Class 7 and more than 50 CFU in ISO Class 8). For facilities compounding Category 1 and 2 CSPs, surface sampling of all classified areas and connected pass-through chambers is required at least monthly.

Common Failure Points for Gloved Fingertip and Surface Sampling

Before anyone compounds independently, they must pass gloved fingertip sampling three times, with zero CFUs, as part of initial qualification. Improper garbing technique is one of the most common failure points. Surface sampling failures tend to trace back to cleaning and disinfection gaps rather than personnel technique, a missed high-touch site, a disinfectant rotation that isn't being followed or equipment that's overdue for recertification.

Gloved Fingertip and Surface Sampling Testing Frequency

Frequency for both tests depends on CSP category:

• Gloved fingertip sampling (Category 1 and 2): Initial competency, then reevaluation every 6 months
• Gloved fingertip sampling (Category 3): Reevaluation every 3 months
• Surface sampling (Category 1 and 2): At least monthly reevaluation for all classified areas and pass-through chambers

Facilities that check these boxes once or twice a year, instead of tracking trends across staff and surfaces together, tend to miss small signs of non-compliance until an inspector catches them first.

Media Fill Testing Requirements

USP 797 media fill testing requirements validate something fingertip sampling can't: whether a technician's full aseptic process can produce a sterile preparation. 

Instead of an actual drug, the technician compounds using microbiological growth media, simulating the most demanding manipulations in their normal workflow (multiple additions, transfers and container types). The filled units are then incubated and checked for microbial growth.

Media Fill Testing Frequency

Once again, required frequency is broken down by category:

• Category 1 and 2: Every 6 months, plus before independently compounding those categories
• Category 3: Every 3 months

This checklist step is especially important because a failed media fill typically requires the technician to pass three consecutive additional tests before resuming compounding, in addition to a look at what in their technique needs retraining.

A Note on Common Compliance Gaps

In our audits, the recurring issue isn't usually the individual tests; it's the lack of cross-checking between them. A handful of scattered positive results across different staff often gets treated as routine variance, but when compared side by side, they can point to a systemic garbing or clean room issue developing over time. 

Frequently Asked Questions

What's included in a USP 797 compliance checklist? 
A complete checklist covers:

• Facility and engineering controls (i.e., ISO-classified PECs, buffer rooms, anterooms)
• Personnel training and garbing
• Environmental monitoring (i.e., viable air and surface sampling)
• Cleaning and disinfection protocols
• Documentation tying each test to a specific person, date and outcome

   

How often is gloved fingertip testing required under USP 797?
Personnel compounding Category 1 or 2 CSPs are reevaluated every 6 months. Those compounding Category 3 CSPs are reevaluated every 3 months. All personnel must pass three times with zero CFUs before compounding independently.

What is media fill testing, and how often is it required?
Media fill testing substitutes growth media for drug products to verify a technician's aseptic technique can produce a sterile preparation. In terms of frequency, it is required:

• Every 6 months for Category 1 and 2 compounding
• Every 3 months for Category 3

• Annually at minimum for those who have direct oversight of compounding personnel

A failed test requires three consecutive passes before the technician can resume compounding.

Ready for Your Next USP 797 Assessment?

Self-audits surface obvious issues, but they don’t always catch what internal teams miss: technique inconsistencies across shifts, environmental trends that haven't been caught yet or documentation gaps that only become apparent under inspection pressure.

Regular third-party testing addresses this gap before a regulator finds it first. Talk to a Lab Testing Expert about scheduling your next round of fingertip and media fill testing, or read more about how Lab 797's testing program is expanding into water testing under USP 1231 and ANSI/AAMI ST108.

If you're reviewing your clean room's engineering controls, our Clean Room and Hood services page covers what ISO Class 5 compliance looks like at the facility level.

For the full regulatory text, see USP General Chapter 797 on usp.org or ASHP's compounding resource center.

Interested in learning more about our lab compliance services? Schedule a Service.