Drug diversion monitoring programs are typically designed around a workforce they know: consistent schedules, established peer groups, and longitudinal dispensing data. Float pool and agency staff disrupt all three from the first shift.
The scale of the underlying problem makes that disruption consequential:
- An estimated 10-15% of healthcare professionals have substance use disorder
- 65% of surveyed facilities believe most diversion goes undetected
- A workforce that rotates across units, has no established peer relationships, and exits before a retrospective audit can run narrows the detection window further
A traveling radiologic technician diverted drugs across eight states before detection, infecting nearly 50 patients with hepatitis C. Each facility he worked at had no mechanism to surface the pattern because it didn’t exist within a single location’s data. That case is an extreme example, but it illustrates what happens when temporary staff access controlled substances without facility-specific oversight.
Who’s Actually Responsible, and Why That Question Creates Risk
Staffing agencies credential and place workers. They do not monitor controlled substance activity once the worker is on-site. Hospitals assume clinical oversight but often haven’t developed onboarding processes that address controlled-substance handling before ADC access begins.
In practice, that means an agency nurse may start pulling medications before any facility-specific diversion training has occurred.
CMS Conditions of Participation (42 CFR §482.23) hold hospitals responsible for controlled substance handling by all nursing staff, agency staff included. ASHP recommends multidisciplinary diversion monitoring across all high-risk areas, and temporary staff frequently move through several of those areas within a single assignment. Neither the regulatory obligation nor the monitoring responsibility transfers with the staffing contract.
That accountability gap has real consequences. In one survey, 50% of hospital respondents said they either didn’t have a procedure or didn’t know what to do if they identified a possible drug diverter. When temporary staff are involved, that uncertainty carries more weight: the staff member may complete their assignment and move on before anyone identifies that a review was ever warranted.
Behavioral Red Flags in Temporary Staff
The behavioral signals of diversion in temporary staff mirror those in permanent employees, with one critical difference. Without a baseline, the signals are harder to read. That said, several patterns are specific enough to flag without one.
- Volunteering to administer controlled substances to patients not assigned to them. Staying close to the source is a documented cover tactic. Offering to help a colleague medicate their patients accomplishes that without drawing obvious attention.
- Requesting witness sign-offs on waste without the witness being present. Retroactive signatures on waste documentation are among the cleaner diversion methods and among the hardest to catch without real-time review.
- Reviewing medication orders for patients they’re not covering. No legitimate clinical reason exists for a float pool clinician to review the controlled substance orders of a patient assigned to a different provider.
- Returning on days off or staying well past the end of a shift. Extended proximity to ADCs outside normal hours warrants attention regardless of employment type.
- Patient complains of unresolved pain following documented administration. When a patient reports inadequate pain relief despite records showing medication was given, that administration deserves closer scrutiny.
The Peer Dynamic Problem
On a unit with stable staffing, informal accountability functions as a first line of detection. Permanent employees know each other’s habits well enough to notice when something is off. They’re also more likely to report it, because they can distinguish a deviation from a norm.
Float pool and agency staff never build that familiarity. Permanent colleagues don’t know whether an unusual behavior reflects a problem or simply a different facility’s standard practice. That ambiguity suppresses reporting and leaves the behavioral flags above without the informal peer check that typically surfaces them first.
Dispensing and Documentation Patterns That Signal Risk
Behavioral observation isn’t the only detection tool available. The dispensing record captures a different category of signals, ones that don’t require anyone to witness a behavior in real time.
| Pattern | What It May Indicate |
| ADC access frequency higher than patient load justifies | Pulling medications beyond what patient care requires |
| Waste documented but not corroborated by a witness | Waste that didn’t occur, or wasn’t witnessed when it did |
| Dispense with no corresponding EHR administration record | Medication pulled but not administered, or not charted |
| Variance spikes tied to a specific staff member’s shifts | A pattern that follows the worker across units |
| Incomplete controlled substance documentation | A compliance gap that may also reflect deliberate obfuscation |
Fentanyl accounts for 24% of controlled substance variances, and 67% of confirmed diversion cases occur in nursing settings, where float pool and agency staff are most concentrated.
What Makes Temporary Staff Patterns Harder to Interpret
A permanent employee’s dispensing data accumulates over time, making anomalies visible against their history. A float pool nurse working a single shift produces a data point, not a pattern. When that nurse covers four units in a week, transactions are fragmented across four separate records.
Manual review processes can’t reconcile that data. A dispense on Unit A and a waste discrepancy on Unit B may never be connected because no one is reviewing both at once. Automated reconciliation closes that gap. ControlCheck automatically reconciles 95% of controlled substance transactions, tracing each dispense through the corresponding administration, waste, or return. What remains is the portion that warrants human review, prioritized by risk.
Where Drug Diversion Prevention Programs Fall Short with Temporary Staff
Most drug diversion prevention programs are built around continuity. Risk scoring depends on individual history. Diversion committees depend on flagged concerns from people who know the staff member. Audit cycles may run well beyond the end of a temporary assignment.
Diversion committees are used by 67% of hospitals as a detection method, but those committees depend on someone raising a flag. Temporary staff rarely build the peer relationships that produce those flags. And when the assignment ends, so does the most actionable window for intervention.
A 13-week travel nurse contract can begin and end before a quarterly audit ever runs. A float pool shift that crosses four units leaves records that may never be reviewed together under a manual process. Drug diversion monitoring that relies on known individuals and stable relationships will always have a structural blind spot for this population.
Controlled Substance Monitoring That Covers All Staff
Controlled substance monitoring that closes the float pool and agency gap has to work at the transaction level, not the employee level. Monitoring tied to employment history will always have blind spots for temporary staff. Monitoring tied to the dispense record will not.
ControlCheck’s Individual Risk Identification Score (IRIS) evaluates behavior against hospital, care area, and department peers, not against the individual’s own prior history. That makes it functional from day one of an assignment, with no baseline-building period required. A float pool nurse pulled into the ICU for the first time is immediately compared against the established behavior of clinicians in that same unit.
The impact on investigation volume is measurable. Hospitals using diversion monitoring software have seen a 61% increase in investigations from 2023 to 2024, driven by automated detection surfacing cases that manual reviews missed. For temporary staff, that detection speed matters most: the review can happen while the staff member is still on-site, not after the contract has ended.
Float pool and agency staff are not inherently higher-risk than permanent employees. But the conditions surrounding their work create a monitoring environment where diversion is easier to execute and harder to catch:
- Fragmented transaction records across multiple units
- No peer baseline for behavioral comparison
- Unclear ownership of oversight between hospital and agency
- Compressed assignment windows that outpace manual audit cycles
The facilities best positioned to close that gap are the ones running drug diversion monitoring that follows the transaction, not the tenure. See ControlCheck in action and learn how Bluesight closes the diversion surveillance gap that temporary staffing creates.