Direct answer: Look near the barcode, lot number, and expiration date on the side or back panel of the original box. Dexcom commonly uses a number labeled “REF.” OmniPod packages commonly display an 11-digit NDC. FreeStyle Libre boxes may use product, sensor, NDC, or catalog identifiers depending on the package.
REF versus NDC
| Identifier | What it usually means | Where you may see it |
|---|---|---|
| REF | Manufacturer reference or catalog number for a specific product configuration | Dexcom and medical-device packaging near the barcode |
| NDC | National Drug Code-format identifier used on many pharmacy-distributed products | OmniPod and some Libre packaging, often shown with hyphens |
| UPC/GTIN | Retail barcode identifier | Near the main barcode; useful but not always the number requested |
| LOT | Manufacturing batch | Near expiration; not a substitute for REF/NDC |
| EXP | Expiration date | Side, bottom or back panel |
How to find a Dexcom REF number
On Dexcom boxes, look for the letters REF followed by a product number. It is often printed close to the barcode, lot number, and expiration date. Do not use the serial number, lot number, or phone-app compatibility wording as the REF.
Dexcom details to submit
- Full model name, such as G7 15-Day, G7 10-Day, or G6 sensors
- REF number exactly as printed
- Pack count
- Expiration date
- Retail, DME, receiver, transmitter, or other package wording
Different G7 15-Day REF variants may have different values. See the G7 15-Day page and Dexcom price guide.
How to identify a FreeStyle Libre model
Start with the full product name on the front panel: Libre 3 Plus, Libre 3, Libre 2 Plus, Libre 2, or 14-Day. Then examine the side or back for an NDC, product/catalog number, barcode, expiration, and wording such as NFR or sample.
Common Libre mistakes
- Selecting Libre 3 when the box says Libre 3 Plus
- Ignoring “NFR” or sample wording
- Using a reader model number for a sensor
- Entering a barcode number as the expiration date
- Combining boxes with different expiration dates
See the FreeStyle Libre selling guide.
How to find an OmniPod NDC
OmniPod boxes commonly show an NDC in a hyphenated format. The NDC helps distinguish OmniPod 5 from DASH, package counts, DME variants, and CGM-compatible versions. Read the entire number; the final digits can identify a different package size or variant.
OmniPod details to submit
- System name: OmniPod 5, DASH, or Classic
- Exact NDC
- Number of pods in the sealed package
- Dexcom or FreeStyle Libre compatibility wording when present
- Expiration date
See the OmniPod identification and pricing guide.
Do not confuse these numbers
- LOT: identifies a manufacturing batch, not the product variant.
- Serial number: identifies a specific device, not the retail package category.
- Expiration: affects the tier but does not identify the model.
- Prescription number: is pharmacy-specific and should not be entered as an NDC.
- UPS tracking number: relates only to shipping.
Photo checklist for product identification
When identification is uncertain, take clear photos of:
- The front of the box showing the full product name.
- The panel showing REF or NDC.
- The expiration and lot panel.
- Any pharmacy, DME, NFR, sample, institutional, or payer labels.
- Any dents, tears, writing, or seal damage.
Privacy when photographing boxes
You may cover personal prescription information such as your name and address, but do not cover the product name, REF/NDC, expiration date, lot number, manufacturer barcode, package count, or distribution wording needed to verify eligibility.
What if the identifier is missing or unreadable?
Do not guess. A missing, torn, obscured, or altered identifier can prevent pricing or make the item ineligible because the exact product cannot be verified. Contact us before shipping and provide the clearest available photos.
Found the identifier?
Enter the exact REF or NDC, expiration date, and quantity for a more accurate estimate.
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