As of April 27, 2020, the Division of Coal Mine Workers' Compensation (DCMWC) contracted with CNSI to handle all medical bill processing.

Medical Providers access the system at to:

Check Eligibility - Learn if a patient is covered for a particular procedure. Providers may print a denial letter if the service is not covered by the Federal Black Lung Program.

Check Bill Payment - Learn status of submitted bills. Providers can view Remittance Vouchers (RVs).

Conduent continues to provide OWCP pharmacy bill processing services and is utilizing a new web address URL ( and new mailing address. See below.

DCMWC Medical Bill Operations

Telephone:  1-800-638-7072

Hours of Operation: Monday through Friday, 8:00 AM to 8:00 PM (EST.)

Mailing Addresses:

Mailing Addresses


Mailing Address

Provider Enrollment

U.S. Department of Labor OWCP/DCMWC
P.O. Box 8312
London, KY 40742-8312

General Bills (Treatment Bills)

U.S. Department of Labor OWCP/DCMWC
P.O. Box 8302
London, KY 40742-8302

General Correspondence, New Claim Applications, Diagnostic/Determination Bills, and X-Ray Disks

U.S. Department of Labor OWCP/DCMWC
P.O. Box 8307
London, KY 40742-8307

Pharmacy Bills

U.S. Department of Labor OWCP/DCMWC Pharmacy Bill Processing
P.O. Box 8309
London, KY 40742-8309

Physical Address for Federal Express/UPS/Courier deliveries ONLY

U.S. Department of Labor OWCP/DCMWC
Central Mailroom
1084 South Laurel Rd
London, KY 40744-7960

IMPORTANT: We are working to have our forms and business reply envelopes updated with the London, KY addresses. Until that is complete, the mailroom currently listed in San Antonio, TX will be forwarding all mail to London, KY. To reduce mail processing delays, please use the London, KY address for mailing, even if the address on the form is San Antonio, TX.

Please be sure to include the claim number on every page you mail or fax to OWCP.