Eszopiclone Powder
NDC Package 66639-019-00

View Billable Units, 11-Digit Conversion Format, and RxNorm mappings
Table of Contents
    1. Package Information
    2. Frequently Asked Questions

Package Information

This product is an UNFINISHED DRUG part of the official NDC directory. Unfinished drugs include products like active ingredients some of which are used in bulk for further processing or compounding. The FDA requires a list of these drugs manufactured in a U.S. commercial distribution facility.

Eszopiclone powders is a medication used to treat a certain sleep problem (insomnia). This formulation utilizes a powder delivery system. Marketed by Calyx Chemicals & Pharmaceuticals Limited, this product is identified by NDC 66639-019.

Identification & Billing

NDC Package Code
66639-019-00
Package Description
25 kg in 1 DRUM
Product Code
66639-019
11-Digit Billing Format
66639001900

Clinical Specifications

Proprietary Name
Eszopiclone
Non-Proprietary Name
Eszopiclone
Substance Name
Eszopiclone
Dosage Form
Powder - An intimate mixture of dry, finely divided drugs and/or chemicals that may be intended for internal or external use.
Active Ingredient(s)
ESZOPICLONE 1 kg/kg
Usage Information
This medication is used to treat a certain sleep problem (insomnia). It may help you fall asleep faster, stay asleep longer, and lessen how often you wake up during the night, so you can get a better night's rest. Eszopiclone belongs to a class of drugs called sedative-hypnotics. It acts on your brain to produce a calming effect. Use of this medication is usually limited to short treatment periods of 1 to 2 weeks or less. If your insomnia continues for a longer time, talk to your doctor to see if you need other treatment.
DEA Schedule
Schedule IV (CIV) Substances

Regulatory & Marketing

Labeler Name
Calyx Chemicals & Pharmaceuticals Limited
Product Type
Bulk Ingredient
Marketing Category
BULK INGREDIENT - A category specifying that a product is marketed as a bulk ingredient.
Start Marketing Date
11-17-2020
Listing Expiration
12-31-2026
Exclude Flag
N
Unfinished Product
Yes
Sample Package
N/A

Hierarchy Structure

Code Lineage

The NDC Directory contains ONLY information on final marketed drugs submitted to FDA electronically by labelers. A labeler might be a manufacturer, re-packager or re-labeler. The product information included in the NDC directory does not indicate that FDA has verified the information provided by the product labeler. Assigned NDC numbers are not in any way an indication of FDA approval of the product.

* Please review the full disclaimer at the bottom of this page.

Frequently Asked Questions

What is the distribution configuration for this product package?

The code 66639-019-00 identifies a specific commercial package of 25 kg in 1 drum of Eszopiclone (UNFINISHED drug), a bulk ingredient labeled by Calyx Chemicals & Pharmaceuticals Limited. This powder is formulated for use and contains eszopiclone as the active substance.

Is this product currently listed with the FDA?

Yes, this product is active and verified within the NDC Directory. It was introduced to the market by Calyx Chemicals & Pharmaceuticals Limited on November 17, 2020. The current certification is valid through December 31, 2026.

What are the primary indications for this medication?

This medication is used to treat a certain sleep problem (insomnia). It may help you fall asleep faster, stay asleep longer, and lessen how often you wake up during the night, so you can get a better night's rest. Eszopiclone belongs to a class of drugs called sedative-hypnotics. It acts on your brain to produce a calming effect. Use of this medication is usually limited to short treatment periods of 1 to 2 weeks or less. If your insomnia continues for a longer time, talk to your doctor to see if you need other treatment.

How is this Calyx Chemicals & Pharmaceuticals Limited product billed for insurance claims?

For medical billing and reimbursement, this package follows the 11-digit CMS format: 66639001900. The table below illustrates the segment conversion from the 10-digit labeler code to the 11-digit provider format.

11-Digit Code Conversion

Billing payers usually require a 5-4-2 segment configuration. Below is the conversion from the 10-digit package format to the 11-digit billing format:

10-Digit Format (5-3-2)
66639-019-00
11-Digit CMS (5-4-2)
66639-0019-00

Note: The zero is added to the Product segment to maintain the 5-4-2 structure.