DEA Form 106 Walkthrough: What Every Veterinary Practice Needs to Know

What Is DEA Form 106?

DEA Form 106 — officially titled Report of Theft or Significant Loss of Controlled Substances — is a mandatory filing required under 21 CFR §1301.76(b). Any DEA registrant, including veterinary practices, must submit this form whenever controlled substances are stolen or significantly lost.

The DEA defines "significant loss" broadly: any loss that cannot be fully attributed to normal counting error, breakage, or documented spillage during legitimate procedures. In practice, if your monthly reconciliation shows an unresolved discrepancy, a Form 106 filing is likely warranted.

When Must You File?

The filing obligation depends on the nature of the loss:

The DEA Field Division phone numbers are listed by state on the DEA contacts page. Have your DEA registration number ready before calling.

Field-by-Field Guide

DEA Form 106 is a two-page document. Below is a guide to each block, using veterinary-specific context.

Block 1 — DEA Registration Number

Your practice's DEA registration number (format: two letters + seven digits, e.g., AV1234567). Located on your DEA Certificate of Registration. Multi-location practices each have their own DEA number; file a separate Form 106 per registered location.

Block 2 — Name and Address of Registrant

The legal name and address exactly as it appears on your DEA registration. Do not use a DBA name unless it matches the registered name.

Block 3 — Date of Theft or Significant Loss

Use the date you discovered the loss, not a hypothetical date of occurrence if unknown. If the loss occurred over a time range (e.g., discovered at month-end reconciliation), use the date you first identified the discrepancy.

Block 4 — Type of Theft/Loss

Check the applicable box: customer theft, employee diversion, burglary/robbery, in-transit loss, or other. For unexplained discrepancies discovered during reconciliation, use "other" and explain in Block 12.

Block 5 — Perpetrator Information

If you have identified or suspect a specific person, provide their name, date of birth, and any identifying information available. Leave blank if unknown.

Block 6 — Local Law Enforcement

Indicate whether local police were notified. If theft is confirmed or suspected, police notification is required alongside the DEA filing. Record the police report number if available.

Block 7 — Insurance Coverage

Check whether your facility carries insurance covering drug theft. This helps DEA assess broader trends, not to evaluate your claim.

Blocks 8–12 — Controlled Substance Details

This is the core of the form. For each controlled substance involved, provide:

Block 13 — Signature

Must be signed by the DEA registrant (the individual whose name appears on the DEA registration certificate) or an authorized agent. The signature certifies the accuracy of the report under penalty of perjury.

How VetRx Ledger Prepares Your DEA-106 Draft

VetRx Ledger automatically generates a pre-filled DEA-106 draft PDF at the end of each monthly reconciliation period. Here's how it works:

1. Running balances computed. The app maintains a running balance for every vial and lot throughout the month, using the hash-chained event ledger. Each DRAW subtracts; each WASTE subtracts; each REVERSAL adds back.
2. Discrepancies flagged. At month-end, the system computes expected vs. actual balance per vial. Discrepancies above threshold (default: 0.5 mL or 1 unit) are highlighted.
3. Drug data pulled automatically. NDC, drug name, strength, and schedule are pulled from the vial ledger entry — no manual re-entry.
4. Blocks 8–12 pre-filled. Each discrepant vial generates a pre-populated row in the draft PDF. Multiple substances are listed on separate lines per DEA instructions.
5. Print-ready draft exported.The PDF is formatted to match DEA Form 106's layout. Your DEA registrant reviews, signs, and files the form.

Common Mistakes to Avoid

• Waiting until annual inspection. DEA inspectors expect to find Form 106 filings on record. A practice that has never filed, despite detectable discrepancies in its log, raises immediate scrutiny.
• Filing only for Schedule II. DEA Form 106 covers significant losses of any Schedule II through Schedule V controlled substance. Fentanyl (CII), hydromorphone (CII), butorphanol (CIII/CIV varies by state), diazepam (CIV), and tramadol (CIV) all apply.
• Omitting local law enforcement. When theft is suspected, police notification is not optional. File a police report and reference the report number in Block 6.
• Using only narrative in Block 12. The per-substance breakdown in Blocks 8–12 is mandatory. A narrative-only explanation in Block 12 without individual substance rows does not constitute proper filing.
• Mixing up the registration number. Multi-location practices often have separate DEA numbers per location. Using the wrong DEA number misdirects the filing.

Best Practices for Audit Readiness

• Reconcile monthly. Monthly reconciliation closes the gap between an actual loss and when you discover it. DEA inspectors look favorably on practices that conduct — and document — regular reconciliations.
• Keep your chain-of-custody exportable.VetRx Ledger's hash-chained export provides tamper evidence if the DEA questions the sequence of events leading up to a discrepancy.
• Retain signed Form 106 copies. DEA regulations require controlled substance records to be kept for a minimum of 2 years (21 CFR §1304.04(a)). Store signed copies in your DEA registration file.
• Cross-reference lot numbers. Form 106 discrepancies should be cross-referenced with your purchase invoices (DEA Form 222 or 222C for Schedule II). VetRx Ledger stores lot and NDC on each vial entry to simplify this lookup.