Workers Compensation Billing Services

Workers' compensation billing services

Workers' compensation billing services bill the employer's insurer or the state fund for a work injury, under rules each state writes for itself: its own fee schedule, forms, attachments and deadlines.

Tell us your states and carriers and we'll walk through the rules that apply. No patient data needed.

The work is getting the claim number, adjuster and authorization right before the visit, sending the bill with the report the state requires, and reading each explanation of review against the state's schedule.

This is part of getting the claim out clean. Buy it on its own or pair it with our other billing services, stage by stage.

Last reviewed October 21, 2026 by the Remitwright billing team. Editorial policy

What workers' compensation billing covers

Claim number, date of injury, employer, carrier and adjuster verified before the first visit, so the bill reaches the right payer with the identifiers the state wants

Authorization requests filed in the state's format before treatment that needs one, and tracked by response date

Bills sent on the form the state requires with the attachment it requires: New York wants a detailed narrative report with every CMS-1500, Pennsylvania wants its LIBC-9 medical report before the payer's processing clock starts

Electronic submission through the route the state names, such as New York's Board-approved submission partners, and paper where a carrier still requires it

Every explanation of review compared with the state fee schedule allowance for the code and region, with short payments and unexplained reductions listed for dispute

State dispute processes used inside their windows: Pennsylvania's fee review, Washington's protest or appeal and its adjustment request, Illinois' interest on late payment

The payer's state deadline diaried on every bill, and a bill that goes past the clock gets a follow-up, not a shrug

Health plan and Medicare rules kept apart from the work injury file: the health plan is billed only when the comp carrier denies the injury, and Medicare conditionally only where its secondary payer rules allow it

What goes wrong when workers' compensation billing is skipped

The bill with no claim number

The patient mentions the injury happened at work, but the front desk bills the health plan, which denies because an accident was reported. The practice then bills the comp carrier without a claim number or adjuster, the carrier returns it, and the service is now months old.

Taking the explanation of review at its word

The carrier pays less than the state schedule and cites a reduction code. Nobody checks the state's ground rules for the region, so the reduction stands. In Washington the window to protest a payment decision is 60 days from receipt, and it closes quietly.

The narrative that never went

A New York bill goes out on a CMS-1500 without the narrative report the Board requires with it. In the Board's terms the bill is not a valid submission, nothing is owed yet, and the practice is waiting on a payment for a bill that was never properly sent.

How we run workers' compensation billing

Intake

Injury details, employer, carrier, claim number and adjuster verified with the carrier before treatment; authorization requested where the state requires it.

Document

The treating clinician's report captured in the format the state expects and attached to the bill, with the state's work status forms where they apply.

Bill

The bill goes by the state's required route, claim number on every page, attachments included, and the submission date logged.

Review

Each payment is checked against the state fee schedule and ground rules. Short pays, denials and silence past the payer's deadline move to the dispute queue.

Dispute and report

State dispute forms filed inside their windows, and a report by carrier of billed, paid, disputed and late.

What you receive every week

Work injury claim register

Every open injury with claim number, adjuster, authorization status and last contact.

Fee schedule variance report

Payments below the state allowance by carrier and code, with the dispute filed and its status.

Carrier report

Days to pay by carrier against the state deadline, and the bills returned for missing information, with the reason.

Worked example: the Pennsylvania clock that never started

A hypothetical urgent care in Pennsylvania treats a warehouse worker's hand laceration and bills the comp carrier on a CMS-1500. The payment never comes. On follow-up the carrier says its 30-day processing period has not started because no LIBC-9 medical report arrived with the bill. The biller sends the report, logs the date the carrier received it, and diaries the 30 days. When payment arrives below the fee schedule for the region, the biller files a fee review inside the window the state allows: 90 days from the original billing or 30 days from the dispute notice, whichever is later.

Questions about workers' compensation billing

Is workers' comp billing really that different from regular insurance billing?

Yes. The payer is an employer's carrier or a state fund, and the fee schedule, forms, attachments and dispute process come from the state's workers' compensation agency, not a health plan. A bill that is fine in one state is invalid in the next.

What is a state fee schedule and why does it matter?

It sets the maximum the carrier pays for each service in that state. Washington calls its set the Medical Aid Rules and Fee Schedules; Pennsylvania's divides fees into four geographic regions on a 1994 Medicare base; Minnesota's RBRVS schedule covers medical and surgical, physical medicine, pathology and laboratory, and chiropractic services. Your payments are checked against the schedule line by line.

Can we bill the patient if the carrier pays less than our charge?

Illinois says no for covered, compensable treatment, with one narrow exception when the employer tells the provider in advance that it will pay only part of a bill. Each state writes its own rule, and we follow the one that applies to you rather than a general policy. On accepted work injury claims we do not send patient statements.

How long does the carrier have to pay?

Set by the state. Pennsylvania gives the payer 30 days to process a bill once the LIBC-9 medical report has been received. Illinois makes payment due within 30 days of the payer receiving substantially all the information needed to adjudicate the bill, with interest of one percent per month on unpaid bills. We diary the state deadline on every bill.

What if the patient also has Medicare?

Workers' compensation sits under the Medicare Secondary Payer rules, and CMS expects everyone in a comp case to protect Medicare's interests. The comp carrier is billed first; if it does not pay promptly, medicare.gov describes a conditional Medicare claim, with promptly usually meaning within 120 days. Medicare is never billed as primary for an accepted work injury.

Do you handle electronic billing rules like New York's?

Yes. Since August 1, 2025, New York requires providers in its workers' compensation system to submit the CMS-1500 electronically through a Board-approved submission partner, with a detailed narrative report attached. We work through the partner you choose.

How soon after the visit does the bill need to go out?

Each state sets its own limit. Washington will not pay bills received more than one year after the date of service, and treats a resubmission without the word Rebill in the remarks as a new bill. Illinois' act sets no deadline for submitting medical bills. The bill goes once the report is attached, and the submission date is logged.

Can workers' compensation billing be outsourced separately from our regular billing?

Yes. Work comp runs on state fee schedules, carrier forms and its own timelines, so it is often split off. A dedicated biller works the carrier bills inside your system, and the weekly report keeps comp receivables on their own line.