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Practice2026-05-22 · 12 min read

Controlled-Substance Receiving Workflow for Veterinary Clinics

Veterinary clinic workflow for receiving controlled substances: purchase records, invoice verification, DEA 222 and CSOS documentation, schedule separation, same-day logging, and inspection readiness.

Ran Chen
Ran Chen
Founder, VetMedGuide. Life-sciences operator and 10× global market-access lead.
Published

The moment a controlled-substance shipment arrives at your veterinary clinic, the clock starts. The DEA requires that receipt be documented, verified, signed, dated, and filed — not eventually, but the same day. Miss a step, and you have a gap in your record chain that a Diversion Investigator will flag during an inspection.

This article covers the controlled-substance receiving workflow from order placement through same-day log entry. It separates the requirements for Schedule II (DEA Form 222 or CSOS) from Schedule III–V (invoice-based), identifies the most common receiving errors in veterinary practices, and provides a workflow you can hand to your inventory lead.

Why the receiving step matters

The receiving record is the entry point for every controlled substance that enters your practice. It connects three documents that must agree:

  1. The purchase order — what you ordered.
  2. The packing slip or invoice — what the wholesaler says they shipped.
  3. The receiving log entry — what you actually received and verified.

If any two of these disagree, you have a discrepancy — and the DEA expects your practice to investigate and resolve it. The receiving workflow is also the point where diversion risk is highest at the supply-chain level: drugs that are signed for but never logged, or shipments that are opened by unauthorized staff before the receiving record is made.

A DEA-compliant veterinary controlled-substance receiving log captures, for every Schedule II–V order received: the date received, the name and address of the supplier, the kind, finished form, and strength of the drug, the quantity, the NDC, and the signature of the person who took receipt.

Ordering: what happens before receiving

The receiving workflow starts with how the order was placed, because the ordering method determines what documentation arrives with the shipment.

Schedule II: DEA Form 222 or CSOS

Schedule II controlled substances (e.g., morphine, hydromorphone, methadone, fentanyl patches) must be ordered using one of two methods:

  • DEA Form 222 — a physical, serialized, single-page triplicate form. The purchaser fills it out, sends the original and second copy to the supplier, and retains the third copy. When the shipment arrives, the purchaser records on Copy 3 the number of containers received and the date received. Completed 222 forms must be stored separately from all other records and retained for at least two years (21 CFR 1305.17).

  • CSOS (Controlled Substance Ordering System) — the electronic equivalent of Form 222. CSOS orders are placed through a DEA-approved system using a digital certificate issued by the DEA Certification Authority. Each CSOS user must have their own certificate and account. Sharing login credentials violates DEA regulations.

Key ordering rules for Schedule II:

  • Each Form 222 can list only one supplier.
  • Each line item is one substance in one form and quantity.
  • The form must be signed by the DEA registrant or a person granted Power of Attorney to sign.
  • Lost or stolen 222 forms must be reported to DEA.
  • Pre-signing blank 222 forms is prohibited.

Schedule III–V: standard purchase order

Schedule III–V substances (e.g., ketamine, tramadol, buprenorphine, gabapentin, phenobarbital) may be ordered through standard purchasing channels — phone, fax, or online through your wholesaler (Patterson Vet, Covetrus, Henry Schein Animal Health, MWI). No Form 222 or CSOS is required.

However, the invoice or packing slip that arrives with the shipment serves as the receiving record, and it must still be signed, dated, and filed.

Step 1: Receive the shipment

When a controlled-substance shipment arrives:

  1. Do not open it in the receiving area with general deliveries. Controlled-substance shipments should be received by an authorized team member in a location where the contents can be verified against the order.

  2. Verify the person receiving is not the same person who ordered. VGP Veterinary's compliance guide recommends division of duties: the person who placed the order should not be the person who receives it. This is a diversion-prevention measure.

  3. Check the shipping address. The delivery address on all orders must match the DEA-licensed location. A shipment delivered to the wrong address is a regulatory problem and a theft risk.

  4. Inspect the outer packaging. Look for signs of tampering, damage, or re-sealing. If the outer box appears compromised, note it before opening.

Step 2: Open and verify the contents

Open the shipment and compare the contents to both the packing slip and your original order:

  • Drug name, strength, and form. Does what arrived match what you ordered?
  • Quantity. Count the number of containers. Compare to the invoice quantity.
  • NDC number. Verify the NDC matches the product ordered. Wholesalers occasionally ship a different manufacturer's product or a different concentration.
  • Lot number and expiration date. Record both for your inventory.
  • Condition. Check that refrigerated items were kept cold and that no vials are cracked or seals broken.

If anything does not match — wrong drug, wrong quantity, missing items — do not log the shipment as received. Contact the wholesaler immediately and document the discrepancy on the packing slip before resolving it.

Step 3: Sign and date the invoice or packing slip

This is the step that turns a delivery into a DEA-compliant receiving record.

All original controlled-substance packing slips and invoices must be signed and dated for the date received by at least one individual — this is the federal requirement under 21 CFR 1304.04. The date is the date your practice took physical possession, not the wholesaler's ship date, and not the invoice date.

The LIVMA's 2026 controlled-substance management training recommends that the packing slip also be marked to indicate that the quantity received matches the quantity on the invoice. Their best-practice recommendation is to have two individuals validate the quantity received, sign, and date the packing slip.

Step 4: Log the receipt

Enter the received drug into your controlled-substance receiving log (or digital system). The entry must include:

  • Date received
  • Name and address of the supplier
  • Drug name, strength, and dosage form
  • Quantity received (number of containers and number of units)
  • NDC number
  • Lot number and expiration date
  • For Schedule II: CSOS order number or DEA Form 222 serial number

If you use a digital system (VetSnap, CUBEX, IDEXX), the entry may auto-populate from invoice data or PIMS integration. Verify the auto-populated fields against the physical product before confirming the entry.

Same-day entry is required. The DEA expects receiving records to be made in real time. Logging a receipt the next day — or batching a week's worth of receipts on Friday — is a compliance risk. If your practice receives controlled substances after hours (emergency delivery, for example), the first authorized team member to arrive the next morning must complete the receiving log.

Step 5: File the documentation

After logging, file the documentation:

Schedule II receiving records

  • Completed DEA Form 222 Copy 3 (or CSOS electronic record) — stored in a locked file cabinet, separate from all other records.
  • Signed and dated invoice or packing slip — filed with the Form 222/CSOS record.
  • These records must be maintained separately from Schedule III–V records.

Schedule III–V receiving records

  • Signed and dated invoice or packing slip — filed separately from general business records, or in a form that makes the controlled-substance information readily retrievable.
  • Under 21 CFR 1304.04(h)(3), Schedule III–V records may be kept with other business records if the controlled-substance information is identifiable and retrievable. In practice, most veterinary compliance consultants recommend filing them separately anyway.

Retention period

All receiving records must be retained for a minimum of two years (21 CFR 1304.04(a)). Some states require longer. The California Veterinary Medical Board requires three years from the date of the animal's last visit. The LIVMA's 2026 training recommends five years. Check your state requirements and keep whichever is longer.

Schedule separation: the rule you cannot break

Under 21 CFR 1304.04(f):

  • Schedule I and II records must be kept separately from all other records of the registrant. This means the Form 222/CSOS file and all associated invoices must be in their own folder, binder, or electronic directory — not mixed with Schedule III–V invoices, not mixed with general inventory records, and not mixed with PIMS printouts.

  • Schedule III–V records must be maintained either separately from all other records or in such a form that the information is readily retrievable from ordinary business records. This gives you a bit more flexibility, but the safest approach is to keep them separate too.

Cross-contamination of Schedule II and Schedule III–V records is considered a standalone violation. AAHA's controlled-substance FAQ is explicit: "Failing to separate records for Schedule II drugs from Schedule III, IV, and V drugs is considered cross-contamination of DEA required paperwork."

Common receiving errors in veterinary practices

Based on DEA enforcement patterns and veterinary compliance consultant guidance:

1. Logging the invoice date instead of the received date

The received date is the day your practice physically took possession. The invoice date and the ship date may be different. An inspector who sees that your receiving log dates match the invoice dates exactly will question whether you are recording actual receipt or copying the invoice.

2. Not counting containers against the invoice

Signing the packing slip without verifying the quantity means you are certifying receipt of drugs you may not have actually received. If the wholesaler shorted you a vial of ketamine and you signed for two, your records will show two — and the physical count will show one. That discrepancy is now your problem.

3. Receiving and ordering by the same person

This creates a single point of failure for diversion. The person who orders can manipulate what is ordered, receive it themselves, and log whatever they want. Division of duties is a best practice, not a DEA requirement, but inspectors look for it.

4. Leaving Schedule II 222 forms in a general filing area

Form 222 and CSOS records must be stored separately from all other records. In a locked file cabinet is preferred. Leaving them in a general accounts-payable folder is a violation.

5. Not closing out Form 222 on receipt

When the shipment arrives, the purchaser must record on Copy 3 the number of containers actually received and the date received. An unclosed 222 form — one where the received quantity and date are blank — is an incomplete record.

6. Delayed logging

Batching receiving entries at the end of the week means the log does not reflect real-time inventory. If a discrepancy occurs in the intervening days, there is no way to determine when it happened.

The receiving log as an investigative tool

When a count discrepancy is discovered in the daily-use log, the investigation path leads back to the receiving record. The formula is:

Opening inventory + received − dispensed − wasted − destroyed = on-hand count

If the on-hand count is off, the receiving log is one of the places you check. Was the drug actually received in the quantity logged? Does the signed invoice confirm the count? Is the Form 222 closed out with the correct received quantity?

A receiving workflow that is complete, signed, same-day, and separate by schedule makes the discrepancy investigation faster and more reliable. A receiving workflow with gaps, unsigned invoices, and mixed files makes it nearly impossible.

Workflow summary

Hand this to your inventory lead:

  1. When the shipment arrives: Authorized receiver (not the person who ordered) opens it in a controlled area.
  2. Verify: Count containers, check drug name, strength, NDC, lot, expiration against the invoice.
  3. Document any discrepancies: Note on the packing slip before contacting the wholesaler.
  4. Sign and date the packing slip: Use the actual received date. Two signatures preferred.
  5. Log the receipt same day: Enter into the controlled-substance receiving log or digital system. For Schedule II, include the 222 serial number or CSOS order number.
  6. Close out the Form 222 (Schedule II only): Record received quantity and date on Copy 3.
  7. File by schedule: Schedule II records in their own locked file. Schedule III–V records separate or readily retrievable.
  8. Retain for minimum two years (or longer per state requirement).

Sources

Topics
Clinic Workflow & Operations
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