What do you do when a controlled-substance count will not close in an ambulatory surgery center?

Recount first, write down what you find, then decide. A count that will not close is not yet a loss. The first move is a physical recount by two people against the record, then a check of the ordinary explanations: an entry made against the wrong room, a waste that was witnessed but never written down, a checkout for a case that was cancelled. Nothing is erased and nothing is corrected quietly, because the original entries are the evidence of what happened. The person your center has designated as responsible for pharmaceutical services (42 CFR 416.48) is told the same day, as your own policy should require, and if the recount does not resolve it, the question becomes whether this is a theft or a significant loss.

There is no federal clock on working a discrepancy itself. A theft or significant loss is different. Once one is discovered, two federal clocks run: written notice to the DEA Field Division Office for your area within one business day of discovery, and a complete and accurate DEA Form 106 within 45 days after discovery (21 CFR 1301.76(b)).

Which drugs and which part of your center does this article cover?

The controlled substances your center stocks and administers on site: what sits in the locked safe or cabinet for sedation, anesthesia and recovery, from delivery into inventory through witnessed waste and the count at the end of the day. It is not about prescribing. The discrepancy here is a stock discrepancy, and it belongs to the center.

Who is standing there, and what happens in the first ten minutes?

Usually it is the end-of-day count, with the last room turned over and most of the staff gone. The count does not match the record, a quick recount does not match either, and nobody can yet say why.

What happens next is worth deciding in advance. Ten minutes of sequence decides how defensible everything written about tonight will be.

1. Stop that stock from moving. No further checkouts against the supply in question until the count is settled. If a case is still running, the patient still gets what the case needs: sign it out as its own documented entry, from a separate supply if you have one, so the count stays as it was found. And if anything about the containers themselves looks wrong, a seal broken, a fluid level off, a label lifted, two things are true at once. The next case may be about to receive whatever is actually in that vial, so quarantine those containers first. And tampering is itself evidence of diversion, so preserve the containers rather than discarding them, write down exactly what you saw, and carry it into the theft and significant-loss determination.
2. Recount with a second person, the physical count read out loud against the record, both names on the result.
3. Do not adjust the paper to make it balance. A count forced into agreement destroys the only trail anybody will have tomorrow.
4. Read back through the day's entries for the ordinary explanations first, and look where a container can end up: the anesthesia carts, the rooms, recovery. Most discrepancies are documentation, not drugs.
5. Tell the designated person and the administrator the same day, not the next morning and not after you have solved it.
6. Write it down while it is fresh, before anyone goes home.

Step 4 finds the answer more often than any other. A vial checked out for a cancelled case and put back in the safe without the return being recorded leaves an extra container on the shelf and a checkout in the record with nothing closing it. A partial wasted and witnessed during the last case, with the paper filled in after the room was cleaned, leaves the same open checkout until the entry is written. Neither has to mean diversion, but on paper both leave the trail diversion leaves: a checkout with nothing in the record closing it. The extra vial on the shelf settles the question only once someone connects it to the open checkout in writing; until then, the record alone reads as a drug that left and was never accounted for.

What gets written down when a count will not close?

Six things, captured in the record itself rather than on a sticky note that becomes an email days later:

• The drug, the strength, the form, and the number counted against the number expected.
• The date and time of the count and of the recount.
• Who counted, who recounted, and who was told.
• The window it could have arisen in, usually the span since the last count that closed.
• Every entry against that drug inside that window, in order, with the room and the case.
• What was checked and ruled out, and what was not.

The last one is the line most easily left out, and the one an outside reader wants most. "Recounted twice, checked all of today's entries, no cancelled case found, waste co-signature for OR 2 present" tells a surveyor what you did. "Count off by one, investigating" tells them nothing.

CMS surveyors look for the same thing from the other side. The survey guidance for 42 CFR 416.48(a), tag Q-0181, says the licensed health care professional designated responsible for the ASC's pharmaceutical services is responsible for determining that all drug records are in order and that an account of all scheduled drugs is maintained and reconciled, and that "any discrepancies in count are reconciled promptly" (State Operations Manual, Appendix L).

Is this a theft or a significant loss, and who decides?

The registrant decides, and the rule gives factors rather than a threshold. No quantity makes a loss significant by itself. 21 CFR 1301.76(b) says that when determining whether a loss is significant, a registrant should consider, among others, these factors:

1. The actual quantity of controlled substances lost in relation to the type of business.
2. The specific controlled substances lost.
3. Whether the loss can be associated with access to those controlled substances by specific individuals, or whether it can be attributed to unique activities that may take place involving the controlled substances.
4. A pattern of losses over a specific time period, whether the losses appear to be random, and the results of efforts taken to resolve them.
5. If known, whether the specific controlled substances are likely candidates for diversion.
6. If known, local trends and other indicators of the diversion potential of the missing controlled substance.

Read factors 3 and 4 together and you have the practical reason one unexplained vial is handled differently in two centers. One can say what happened in the window and who had access. The other cannot, because its record does not go that deep. The determination itself is a judgment your center makes with its own counsel. And when the call stays genuinely close after the factors are weighed, DEA's own guidance points one way: file the report.

If the recount or the read-back explains the difference, you have a documentation event rather than a loss, and it still gets recorded. Write down the near miss too. Three unrecorded returns from cancelled cases in one month is a workflow problem, and it is cheaper to fix early than to explain later.

What are the two federal clocks, and when do they start?

There are two, they are different lengths, and they are often described as one. 21 CFR 1301.76(b), as amended at 88 FR 40712 on June 22, 2023, sets both:

• The written notice. The registrant notifies the DEA Field Division Office in its area, in writing, of the theft or significant loss of any controlled substances within one business day of discovery.
• The Form 106. The registrant also files a complete and accurate DEA Form 106 within 45 days after discovery, through DEA's Diversion Control Division secure network application.

One business day is the clock on the notice, not on the form. The 45 days exist because a complete and accurate Form 106 asks for detail a center cannot honestly have on day one.

Both clocks run from discovery of the theft or loss. Recounting, reading back through the entries, calling counsel and interviewing staff are all worth doing, and none of them pauses either clock once a theft or significant loss has been discovered. That is worth writing into your own policy, because the instinct in the room is to wait until you know more.

What should your policy already say before this happens?

The centers that handle the first hour well wrote it down on a quiet day. Name four things in your own policy: who is told and how fast, who may declare a discrepancy resolved, who makes the significant-loss call and with which counsel, and where the two clocks are written in plain numbers so nobody looks them up under pressure. If what you are reporting is a theft, the Form 106 will also ask whether local law enforcement was notified, so name who makes that call as well. Federal law is the floor. Your state board of pharmacy and your accreditor may add their own requirements.

This article describes federal requirements in general terms. It is general information, not legal advice. Countra and Autonomous Healthcare, Inc. are not affiliated with, endorsed by, or acting on behalf of the Drug Enforcement Administration, the Centers for Medicare and Medicaid Services, any state board of pharmacy, or any accrediting organization. Confirm every requirement with your own counsel and your state board of pharmacy before you rely on it. Reviewed and current as of October 26, 2026.

Countra does not make a facility DEA compliant, does not file DEA forms, and does not prevent or guarantee the detection of diversion. Compliance and reporting remain the registrant’s responsibility.