What Is Workers' Compensation Billing?
Workers' compensation billing submits claims to the workers' comp carrier (or self-insured employer) for occupational injuries and illnesses, governed by state workers' comp law and the state-specific fee schedule. Each state operates its own program with its own fee schedule, bill-review process, utilization-review framework, IME billing rules, and lien procedures. Federal workers are covered separately under FECA, Longshore, and Defense Base Act programs.
- 50 state programs plus federal FECA, Longshore (LHWCA), and Defense Base Act systems
- Each state sets its own fee schedule: Texas applies Medicare payment policies at a state conversion factor ($72.07 for office-setting services in 2026)
- Bill review and utilization review gate payment — denials require documented appeal
- IME, lien filings, and treating-physician reports billed under separate state-specific code sets
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An orthopedic practice that treats one workers' comp injury a week — a meniscus tear from a warehouse fall, a rotator cuff from a construction lift — quickly discovers that workers' comp billing is not a single payer but 50 separate state systems plus federal programs (FECA for federal workers, Longshore and Harbor Workers' Compensation Act, Defense Base Act). California operates under DWC and the Official Medical Fee Schedule (OMFS); Texas runs through DWC with a Medical Fee Guideline that applies Medicare payment policies at a Texas conversion factor ($72.07 for office-setting services in 2026); Florida operates under DWC and the Reimbursement Manual; New York uses the WCB Medical Fee Schedule. That is the working baseline of workers' comp billing: a state-by-state system where each state legislature sets the fee schedule, the bill-review process, the IME (Independent Medical Examination) billing rules, and the lien/utilization-review framework. Private-industry employers reported 2.5 million nonfatal workplace injuries and illnesses in 2024, per the BLS Survey of Occupational Injuries and Illnesses (released January 22, 2026). This page covers how workers' comp billing actually plays out across state-specific fee schedules, employer-versus-carrier coordination, the bill-review and utilization-review processes that gate payment, lien filings on disputed claims, and the IME billing pathway that runs alongside primary treatment.
Workers' Compensation at a Glance
Nonfatal workplace injuries and illnesses, private industry (2024)
2.5 million
Source: BLS Survey of Occupational Injuries and Illnesses, released 22 Jan 2026
Number of state workers' comp systems
50 states + DC
Source: DOL OWCP, State Workers' Compensation Officials
Federal and postal workers covered under FECA
~3 million
Source: DOL Solicitor, Division of Federal Employees' and Energy Workers' Compensation
Texas WC conversion factor, office-setting services (2026)
$72.07
Source: Texas DWC conversion factor page; 28 TAC §134.203
California WC lien filing fee
$150 per lien
Source: California Labor Code §4903.05(d)
States with exclusive state-fund WC
ND, OH, WA, WY (4 states)
Source: National Academy of Social Insurance, Workers' Compensation: Benefits, Costs, and Coverage (2022 data)
Billing Challenges Specific to Workers' Compensation
State-by-state fee schedules and the 'percent of Medicare' problem
Each state legislature sets its workers' comp fee schedule, and the methodology is rarely consistent. Texas DWC §134.203 sets the Maximum Allowable Reimbursement (MAR) for professional services by applying Medicare payment policies with a Texas conversion factor ($72.07 for office-setting services in 2026, against Medicare's $33.4009); the 125 percent figure applies to other categories such as DME and supply codes. California's OMFS physician fee schedule uses Medicare's RBRVS with a California conversion factor. Florida publishes a Health Care Provider Fee Schedule alongside its Reimbursement Manual. New York WCB publishes its own Medical Fee Schedule. A multi-state practice billing the same CPT to the same carrier in two states will see two different allowed amounts because the underlying state fee schedule controls. Practices that load 'workers' comp' as a single payer in their PM system and apply one expected-allowable produce variance that masks recoverable underpayment.
Employer-versus-carrier coordination and self-insured employers
A workers' comp claim is paid either by the employer's WC insurance carrier (Travelers, Hartford, Liberty Mutual, AmTrust, Zurich, regional carriers) or by the employer directly when the employer is self-insured. Self-insured employers contract with third-party administrators (TPAs) — Sedgwick, Gallagher Bassett, Broadspire, ESIS — to handle claim administration. The patient gives the employer's name at intake, but the actual payer for billing purposes is the WC carrier or the TPA assigned by the self-insured employer. Practices that submit claims to the employer directly when a TPA is on the case have those claims sit unprocessed until they age past the prompt-pay threshold.
Utilization review and bill review as gatekeeping mechanisms
Most state WC systems require utilization review (UR) for non-emergent care to confirm medical necessity before treatment is approved. California Labor Code §4610 mandates UR; Texas DWC requires preauthorization for designated procedures under §134.600. UR decisions can deny services that are clinically indicated when the documentation does not match the state's utilization-review guideline (Official Disability Guidelines, MTUS in California, ODG in Texas). Bill review is the post-service gatekeeping layer where a bill-review vendor (Mitchell, Coventry, Conduent, Optum WC) audits the claim against the state fee schedule, applies allowed-amount reductions, and issues an Explanation of Review. Claims that bypass the UR step or fail bill review require formal appeal through the state's WC dispute resolution process.
IME (Independent Medical Examination) billing and treating-physician reports
Most state WC systems include an IME pathway where the carrier or employer can require the injured worker to be evaluated by a designated examiner. IME billing follows separate state-specific rules — California uses QME (Qualified Medical Evaluator) and AME (Agreed Medical Evaluator) processes with state-published fee schedules for evaluation reports; Texas uses Designated Doctor Reports under DWC §127. Treating physicians also have specific report-billing codes — initial treatment plans, progress reports, work-status reports, return-to-work assessments. The reports themselves are billable under state-specific HCPCS or state-specific report codes (WC002 for the PR-2 progress report in California, state-published codes in others), and missing a state-required report directly delays the underlying treatment claim payment.
Liens, disputed claims, and the lien-filing process
When a workers' comp claim is denied, contested, or the underlying compensability is disputed, the treating provider's bills accumulate as unpaid liens on the WC case. Lien processes vary by state — California uses the WCAB (Workers' Compensation Appeals Board) lien procedure with a $150 lien filing fee per lien under Labor Code §4903.05(d), while in Florida a provider contesting a carrier's disallowance or adjustment of payment petitions DWC within 60 days after receiving the notice (s. 440.13(7), Florida Statutes). Liens must be filed within state-specific timeframes (California: not more than 18 months after the date of service for medical-expense liens on services from July 1, 2013, Labor Code §4903.5) and tracked through the WC dispute resolution process. Practices without a lien-tracking workflow lose recoverable revenue when liens lapse before adjudication or settle for cents on the dollar at case-resolution conferences.
What We Handle for Workers' Compensation
Carrier-versus-self-insured-employer identification at intake
WC intake workflow that identifies the actual payer: the carrier (Travelers, Hartford, Liberty Mutual, AmTrust, Zurich) or the TPA (Sedgwick, Gallagher Bassett, Broadspire, ESIS) assigned by a self-insured employer. Claim submission routed correctly so claims do not sit unprocessed at the employer level.
Per-state fee-schedule application and expected-allowable variance tracking
State fee schedules loaded per claim — Texas DWC conversion factor, California OMFS, Florida Reimbursement Manual, New York WCB Medical Fee Schedule, and the long tail of state-specific schedules. Posted-payment-versus-expected-allowable variance reporting at the line level so underpayments surface for appeal.
Utilization review submissions and appeal of UR denials
UR submission packets built to the applicable state's utilization-review guideline (MTUS in California, ODG in Texas, ODG nationally as a default). Pre-auth requests filed under state preauthorization lists (Texas DWC §134.600, California §4610), and IMR (Independent Medical Review) appeals when UR denials are clinically defensible.
Bill-review reconciliation and post-payment dispute resolution
Explanation-of-Review reconciliation against the state fee schedule, contested-amount challenges through the bill-review vendor (Mitchell, Coventry, Conduent, Optum WC), and formal medical-fee-dispute filings through the state WC division when bill-review reductions exceed the state fee-schedule allowable.
IME, QME, AME, and treating-physician report billing
QME/AME evaluation report billing in California, Designated Doctor Report billing in Texas, IME report billing in state-specific systems, plus treating-physician progress-report codes (PR-2 in California, work-status forms in multiple states) so report-billing aligns with the underlying treatment claims.
Lien filing and WCAB/state-board lien tracking
Formal lien filings and reimbursement-dispute petitions through the state WC dispute resolution mechanism (WCAB liens in California, DWC petitions in Florida, state WC commissions elsewhere), lien-filing-fee management ($150 per lien in California under Labor Code §4903.05), and lien tracking through case resolution to recover medical-provider revenue on disputed claims.
Codes Frequently Billed to Workers' Compensation
| Code | Description |
|---|---|
| 99202 | New patient office visit, straightforward complexity (initial WC evaluation) |
| 99203 | New patient office visit, low complexity (most-billed WC initial visit) |
| 99213 | Established patient office visit, low complexity (WC follow-up) |
| 99214 | Established patient office visit, moderate complexity |
| 97110 | Therapeutic exercise, 15 minutes (WC physical therapy) |
| 97140 | Manual therapy, 15 minutes (WC PT/chiropractic) |
| 20610 | Major joint injection (knee/shoulder injections common in WC) |
| 29881 | Knee arthroscopy with meniscectomy (orthopedic WC surgery) |
| WC002 | Primary treating physician progress report, PR-2 (California report code) |
| 99456 | Work-related medical disability evaluation by other than treating physician |
Last updated: 2026-10-02
Common Questions
Common questions about workers' compensation billing services.
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Request ReviewHow is workers' compensation billing different from health insurance billing?
Workers' compensation is governed by state workers' comp law rather than federal health-insurance regulation. There are no copays, deductibles, or premiums on the patient side — the employer's WC insurance carrier (or self-insured employer) pays for all medically-necessary treatment of the work-related injury. Each state operates its own WC system with its own fee schedule, utilization-review framework, IME process, and dispute-resolution mechanism. Practices treating WC patients submit claims to the employer's WC carrier or the TPA assigned by a self-insured employer, not to the patient's regular health insurer. The patient's standard health insurance (commercial, Medicare, Medicaid) is secondary or non-applicable for the work-related injury.
How do state fee schedules work in workers' compensation?
Each state legislature sets a workers' comp medical fee schedule that defines the maximum allowable reimbursement for each CPT and HCPCS code. Texas DWC §134.203 sets the Maximum Allowable Reimbursement (MAR) for professional services by applying Medicare payment policies with a Texas conversion factor ($72.07 for office-setting services in 2026, against Medicare's $33.4009); the 125 percent figure applies to other categories such as DME and supply codes. California's Official Medical Fee Schedule for physician services uses Medicare's RBRVS with a California conversion factor. Florida publishes a Health Care Provider Fee Schedule alongside its Reimbursement Manual. New York WCB publishes its own Medical Fee Schedule with state-specific values. Bill-review vendors enforce the fee schedule on each claim, reducing billed amounts to the state allowable. Multi-state WC billing requires per-state expected-allowable tracking because the same CPT pays differently depending on which state's fee schedule applies.
What is utilization review and how does it gate WC treatment?
Utilization review (UR) is the prospective approval process that most state WC systems require before non-emergent treatment is provided. California Labor Code §4610 mandates UR for treatment requests; Texas DWC §134.600 requires preauthorization for designated procedures including spinal surgery, work hardening, chronic pain management, and repeat diagnostic studies with a fee-guideline rate above $350. UR decisions are made against the applicable state's utilization-review guideline — MTUS in California, ODG in Texas, and ODG (Official Disability Guidelines) as a default in many states. UR denials can be appealed through Independent Medical Review (IMR in California) or the state's medical-dispute-resolution process. Treatment provided without required UR approval may not be billable, even when clinically necessary.
What is the role of bill review in WC billing?
Bill review is the post-service audit process where a contracted vendor (Mitchell, Coventry, Conduent, Optum Workers' Compensation) reviews the submitted claim against the state fee schedule, applies allowed-amount reductions, identifies non-covered or non-authorized line items, and issues an Explanation of Review (EOR) to the carrier or self-insured employer. The bill-review vendor then issues payment at the reviewed amount. Practices receiving bill-review reductions must reconcile each EOR line against the state fee schedule and dispute reductions that exceed the state allowable through the formal medical-fee-dispute process. State WC divisions (Texas DWC, California DWC, Florida DWC) adjudicate medical-fee disputes when the bill-review vendor and the provider cannot agree.
How do liens work on disputed workers' compensation claims?
When a workers' comp claim is denied or its compensability is disputed, the treating provider's unpaid bills accumulate as liens on the WC case. Each state has its own process. California uses the WCAB lien procedure with a $150 lien filing fee per lien under Labor Code §4903.05(d), and Labor Code §4903.5 bars a medical-expense lien filed more than 18 months after the date of service (for services on or after July 1, 2013). In Florida, a provider contesting a carrier's disallowance or adjustment of payment petitions DWC within 60 days after receiving the notice (s. 440.13(7), Florida Statutes). Liens are tracked through the case until the underlying compensability dispute is resolved at a hearing, settled at a Mandatory Settlement Conference, or settled through Compromise and Release. Liens that go unperfected within state deadlines lapse, and liens at case resolution often settle below face value.
How does QME billing work in California workers' comp?
A QME (Qualified Medical Evaluator) is a physician certified by California's Division of Workers' Compensation to perform medical-legal evaluations in disputed claims. QME billing does not use the standard treatment fee schedule — medical-legal evaluations are billed under California's Medical-Legal Fee Schedule using ML codes (ML201 comprehensive evaluation, ML202 follow-up evaluation, ML203 supplemental report, ML200 missed appointment), with modifiers for specialty and for AME status. AME (Agreed Medical Evaluator) work — where both sides agree on the evaluator — pays at a higher modifier-adjusted rate. The report is the billable product: late, incomplete, or non-compliant reports are the main reason QME bills get reduced or refused, and the underlying treatment claims often wait on the evaluation outcome, so report deadlines drive the whole account's cash flow.
How do federal workers' comp programs differ from state programs?
Federal civilian workers are covered under the Federal Employees' Compensation Act (FECA), administered by the DOL Office of Workers' Compensation Programs (OWCP). Maritime workers are covered under the Longshore and Harbor Workers' Compensation Act (LHWCA), and overseas defense contractors are covered under the Defense Base Act (DBA). Each federal program has its own claim-submission process, fee schedule, and authorization framework. FECA bills are submitted electronically through the OWCP Provider Portal with OWCP-specific authorization numbers attached. The federal programs operate independently of state WC programs — a federal employee injured at work bills FECA, not the state WC system, regardless of which state the injury occurred in.
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