How to Fill Out DOL Form OWCP-1500 (w/Examples) + FAQs

Form OWCP-1500 is the U.S. Department of Labor’s official medical billing form that doctors, hospitals, therapists, and other professional providers use to bill the Office of Workers’ Compensation Programs for treatment given to injured federal workers, longshore workers, coal miners with black lung disease, and former nuclear weapons workers. You fill it out by entering the patient’s claim number, the provider’s tax ID and NPI, the diagnosis codes in ICD-10, the services in CPT or HCPCS codes, the charges, and the signed certification, then submit it through the WCMBP Provider Portal run by Acentra Health within one calendar year of service.

The form looks almost identical to the commercial CMS-1500 (02/12) used by Medicare, but the rules behind it come from a different place. The governing authorities are the Federal Employees’ Compensation Act regulations at 20 CFR 10.801–10.818, the Longshore and Harbor Workers’ Compensation Act medical rules at 20 CFR 702.401–702.421, the Black Lung Benefits Act regulations at 20 CFR 725.701–725.711, and the Energy Employees Occupational Illness Compensation Program rules at 20 CFR 30.700–30.722. One mistake on the form, one wrong digit in the case number, or one missing modifier can trigger an instant denial, and providers cannot bill the patient for the balance under 20 CFR 10.813.

According to the DOL FY 2024 Agency Financial Report, OWCP processed more than 9.2 million medical bills worth over $1.6 billion in a single fiscal year, and roughly 18% of bills are rejected or denied on first pass for clerical or coding errors that the provider could have caught.

Here is what you will learn in this guide:

• 🩺 How to complete every box on Form OWCP-1500 line by line, with named examples
• 📂 Which OWCP program (FECA, Longshore, Black Lung, EEOICPA) controls your bill and why
• 💻 How to choose between paper, web portal, and EDI 837P electronic submission
• ⚠️ The seven most common reasons OWCP rejects a 1500 and how to fix each one
• ⚖️ How to appeal a denial, request reconsideration, and protect your one-year filing window

What Form OWCP-1500 Is and Who Uses It

Form OWCP-1500 is the professional services claim form used to bill the four OWCP programs for outpatient medical services, evaluations, durable medical equipment under certain limits, and ancillary care. The current version is found on the DOL forms library page and mirrors the National Uniform Claim Committee’s CMS-1500 (02/12) data set. The form exists because federal workers’ compensation is not health insurance, and OWCP needs a uniform way to capture the unique data points (claim number, date of injury, accepted conditions) that a regular insurer never asks for.

The consequence of using the wrong form is immediate. If a provider sends a UB-04 for professional services, or a commercial CMS-1500 without the OWCP-specific identifiers, the WCMBP system returns the claim unprocessed. The bill does not stop the one-year clock under 20 CFR 10.803, which means a provider who keeps resubmitting the wrong form can lose the right to be paid at all.

A common misconception is that the OWCP-1500 is only for doctors. In reality, physical therapists, occupational therapists, chiropractors (within the limits of 5 U.S.C. 8101(2)), psychologists, nurse practitioners, ambulance providers, and home health aides all bill on this form. Hospitals bill inpatient and facility charges on the OWCP-04 (UB-04 equivalent), and pharmacies bill electronically through the point-of-sale network managed by the WCMBP pharmacy benefit manager.

The Four OWCP Programs Behind the Form

The Division of Federal Employees’, Longshore and Harbor Workers’ Compensation (DFELHWC) covers civilian federal employees injured on the job under FECA. Claim numbers in this program are nine digits and start with two letters representing the district office, such as A1, A2, or 09. The accepted conditions on the Form CA-16 authorization or the formal acceptance letter define what the OWCP-1500 may bill for, and any service outside those conditions is denied.

The Division of Longshore and Harbor Workers’ Compensation covers maritime workers, defense base workers, and certain D.C. workers under the LHWCA. Bills here often go to the self-insured employer or its carrier rather than directly to OWCP, but providers still use the OWCP-1500 format because the LHWCA medical fee schedule at 20 CFR 702.601–702.604 controls reimbursement.

The Division of Coal Mine Workers’ Compensation administers Black Lung benefits for miners with pneumoconiosis. The OWCP-1500 here covers pulmonologist visits, oxygen therapy professional fees, and pulmonary rehabilitation under the Black Lung Medical Benefits regulations.

The Division of Energy Employees Occupational Illness Compensation (DEEOIC) pays for cancer, beryllium disease, silicosis, and other illnesses tied to atomic weapons work under EEOICPA. Home health care under DEEOIC is the largest single bill category and uses the OWCP-1500 with specific home health modifiers.

When the OWCP-1500 Is Required Versus Other Forms

Use OWCP-1500 for professional services. Use OWCP-04 for inpatient hospital, outpatient hospital facility, and skilled nursing facility charges. Use OWCP-957 Medical Travel Refund Request when the claimant seeks mileage and travel reimbursement, never for medical services. Use the OWCP-915 Claimant Medical Reimbursement Form when a claimant paid out of pocket and now wants reimbursement.

The consequence of mixing these up is denial with reason code W7163 (“incorrect form type”) or W7050 (“provider must bill on appropriate form”). Each rejection burns calendar days off the timely-filing limit. A real example is Brenda Ortiz, a physical therapist who billed home visits on an OWCP-04 for six months before realizing the WCMBP system was silently rejecting them; by the time she switched to the OWCP-1500, more than half of her bills were past the one-year window and permanently unpayable.

Before You Fill Out the Form: Five Things to Verify

Before pen ever touches paper, the provider must confirm five things. First, the claim must be accepted, not merely filed. An accepted claim has a formal acceptance letter listing ICD-10 conditions, and only those conditions can be billed. Second, the provider must be enrolled with WCMBP through the provider enrollment portal and have an active OWCP Provider ID. Third, services that need prior authorization (surgery, MRI, opioids beyond 60 days, durable medical equipment over $300, physical therapy beyond the auto-approved visit cap) must already be authorized in the system. Fourth, the date of service must be on or after the date of injury and within the bill timely-filing window. Fifth, the diagnosis on the bill must match an accepted condition.

The consequence of skipping any of these steps is a denial that the provider often cannot appeal because the underlying problem is structural, not clerical. A common misconception is that calling the OWCP Medical Bill Processing Customer Service line at 1-844-493-1966 before billing fixes the issue. The agents can confirm enrollment and eligibility but cannot retroactively authorize a service.

A short example: Dr. Marcus Liang, an orthopedic surgeon, performed a rotator cuff repair on a postal worker whose accepted condition was “right shoulder strain.” Because rotator cuff tear was never added to the acceptance letter, every line of his $14,800 OWCP-1500 was denied, and he had to file a Form CA-2a recurrence or expansion request through the claimant before he could bill again.

Line-by-Line Walkthrough of Form OWCP-1500

The form has 33 numbered fields plus a header. The official OWCP-1500 billing instructions walk through each box, and the field numbers below match that document.

Header and Carrier Block

At the very top, write or print “OWCP” followed by the program name (DFEC, DLHWC, DCMWC, or DEEOIC) and the central mailing address: U.S. Department of Labor, OWCP/DFEC Central Mailroom, P.O. Box 8300, London, KY 40742-8300. The address differs slightly by program, and the WCMBP mailing address page lists the current P.O. boxes. The consequence of mailing to a stale address is that the U.S. Postal Service may forward the envelope, but the bill date stamp does not change, and the timely-filing clock keeps running.

Field 1: Insurance Type

Check the box marked “Other”. Federal workers’ comp is not Medicare, Medicaid, TRICARE, CHAMPVA, Group Health Plan, or FECA Black Lung as labeled on the commercial form. The “Other” box plus the OWCP claim number in Field 1a is what tells the system this is a workers’ compensation bill.

Field 1a: Insured’s ID Number

Enter the nine-digit OWCP claim number with no dashes or spaces. For DFEC the number looks like A1-1234567 but is keyed as A11234567. For DEEOIC, the case number is the claimant’s Social Security number for legacy cases or a generated number for newer ones. The consequence of one wrong digit is a hard reject; the system has no fuzzy matching.

Fields 2–8: Patient Information

Enter the patient’s full legal name (Field 2), date of birth and sex (Field 3), the insured’s name which for OWCP is the same as the patient (Field 4), the patient’s address (Field 5), the patient relationship to insured marked “Self” (Field 6), the insured’s address again if different (Field 7), and reserved Field 8 left blank. The most common mistake is using a nickname; the name must match the case file exactly.

Fields 9–9d: Other Insured

Leave blank for OWCP bills. Federal workers’ comp is the primary and exclusive payer for accepted conditions under 20 CFR 10.811, and listing a private insurer here can trigger a coordination-of-benefits hold.

Fields 10a–10c: Patient Condition

Mark “Yes” for “Employment (Current or Previous)” in Field 10a. This single check is what tells OWCP the visit relates to the work injury. Fields 10b (auto accident) and 10c (other accident) are almost always “No” for OWCP claims.

Field 11: Insured’s Policy Group

Enter the date of injury in MMDDYYYY format. This is not a policy number despite the field label. The date of injury must match the date on the acceptance letter. A wrong date of injury is the second-most common rejection reason after wrong claim number.

Fields 12 and 13: Signatures

Field 12 is the patient’s authorization to release information; the provider can write “Signature on File” if a signed Form OWCP-1168 release is in the chart. Field 13 is the assignment of benefits and is also “Signature on File”.

Field 14: Date of Current Illness or Injury

Enter the date of injury again in MMDDYYYY. For occupational disease claims under FECA, use the date of last exposure or the date the claimant first became aware the condition was work-related, matching the acceptance letter.

Fields 15–16: Other Date and Unable to Work

Field 15 is usually blank. Field 16 captures the dates the patient was unable to work, which matters for surgery and inpatient bills because OWCP cross-checks against wage-loss compensation periods.

Field 17: Referring Provider

Enter the name of the referring physician or the treating physician of record. Use DN as the qualifier for “Referring Provider” or DK for “Ordering Provider” per the NUCC instruction manual.

Field 17a and 17b: Referring Provider IDs

Field 17a is the legacy ID with the qualifier (such as G2 for the OWCP Provider ID). Field 17b is the NPI. OWCP requires both for any service that needs a referral, and missing IDs are the leading cause of denial code W7012.

Field 18: Hospitalization Dates

Fill in only if the service on this bill relates to a hospital admission. Use MMDDYYYY for both “From” and “To”.

Field 19: Additional Claim Information

This is a free-text field. For OWCP, common entries include the CA-16 authorization number if the visit is under an emergency CA-16, the prior authorization number for surgery, or “By Report” for unlisted procedures. The consequence of leaving this blank when an authorization exists is that the system may pend the bill for manual review for up to 60 days.

Field 20: Outside Lab

Mark “No” unless the provider sent specimens to an outside lab and is billing for the outside work. If “Yes,” enter the charges. Improper use here is rare but causes the bill to suspend.

Field 21: Diagnosis or Nature of Illness

Enter up to 12 ICD-10-CM codes lettered A through L. Code A must be the primary accepted condition exactly as it appears on the acceptance letter. The consequence of listing a non-accepted code in position A is a full bill denial even if the other codes are accepted. Always check the ICD-10 indicator “0” is in the small box at the top right of Field 21 to show ICD-10 (not ICD-9) is in use.

Field 22: Resubmission Code

Use 7 for a corrected claim and 8 for a void/cancel of a prior claim, with the original WCMBP Internal Control Number (ICN) in the “Original Reference No.” box. Submitting a correction without code 7 creates a duplicate-billing denial.

Field 23: Prior Authorization Number

Enter the WCMBP authorization number for any service that required prior approval. The DFEC procedures requiring authorization list is updated regularly and includes most surgeries, advanced imaging, and DME.

Field 24: The Service Lines

Field 24 has six service lines, A through J. This is where most billing errors happen.

Field 24A: Dates of Service

Enter “From” and “To” dates in MMDDYYYY. Each line is one calendar date or one continuous span of identical services. The consequence of spanning dates incorrectly is that units may be miscounted.

Field 24B: Place of Service

Use the two-digit CMS Place of Service code, such as 11 (office), 12 (home), 21 (inpatient hospital), 22 (outpatient hospital), or 23 (emergency room).

Field 24C: EMG

Mark “Y” only for true emergencies tied to a CA-16 emergency authorization. Misuse triggers manual review.

Field 24D: Procedures, Services, or Supplies

Enter the CPT or HCPCS code plus up to four modifiers. Common OWCP modifiers include GP (physical therapy plan of care), GO (occupational therapy), GA (advance beneficiary notice on file – rarely used in OWCP but accepted), 25 (significant E/M same day as procedure), 59 (distinct procedural service), RT/LT (right/left), and HH (home health for DEEOIC).

Field 24E: Diagnosis Pointer

Use letters A–L matching Field 21. Up to four pointers per line. Pointer A must always come first if multiple are listed. The consequence of pointing to a non-accepted condition is denial code W7301.

Field 24F: Charges

Enter the provider’s usual and customary charge in dollars and cents. OWCP pays the lesser of billed charges or the OWCP Medical Fee Schedule under 20 CFR 10.812. Billing below the fee schedule means the provider gets less than they could have.

Field 24G: Days or Units

Enter whole units. For timed therapy codes (97110, 97140), one unit equals 15 minutes under the CMS 8-minute rule, which OWCP follows.

Field 24H: EPSDT

Leave blank for OWCP.

Field 24I and 24J: Rendering Provider IDs

Field 24I holds the qualifier; Field 24J holds the rendering provider’s NPI in the unshaded portion and the OWCP Provider ID in the shaded portion. Mismatched IDs cause denial code W7110.

Field 25: Federal Tax ID Number

Enter the EIN (or SSN for sole proprietors) and check the matching box. This is the number that appears on the 1099-MISC the provider receives at year end.

Field 26: Patient Account Number

A free-text internal account number up to 14 characters. It appears on the WCMBP remittance advice, which makes posting payments far easier.

Field 27: Accept Assignment

Always mark “Yes” for OWCP. Refusing assignment is meaningless because 20 CFR 10.813 bars balance billing.

Field 28: Total Charge

Sum of all Field 24F charges. Math errors here are caught by the WCMBP scrubber and rejected as code W7090.

Field 29: Amount Paid

Enter any amount the patient or another payer paid toward the charges. For OWCP claims, this is almost always $0.00.

Field 30: Reserved for NUCC Use

Leave blank.

Field 31: Signature of Physician or Supplier

The rendering provider’s signature and the date. “Signature on File” is acceptable for electronic submissions but not for paper.

Field 32, 32a, 32b: Service Facility Location

The address where the service was rendered, the facility NPI, and the facility OWCP Provider ID. Home visits use the patient’s address. Skipping this field is a top-five rejection.

Field 33, 33a, 33b: Billing Provider Info and Phone

The pay-to address, the billing NPI, and the billing OWCP Provider ID. The pay-to address must match the WCMBP enrollment file exactly, including punctuation.

Three Real-World Billing Scenarios

The table below walks through three common OWCP-1500 fact patterns and the practical consequences of each billing decision.

Scenario 1: FECA Office Visit With Physical Therapy

Provider Action	Billing Consequence
Bill 99213 with diagnosis pointer A (accepted lumbar strain)	Paid at fee schedule, roughly $92
Bill 97110 x 4 units same day, modifier GP, pointer A	Paid roughly $112 if under 12-visit auto-cap
Forget modifier GP on 97110	Denied, code W7401, must correct and resubmit

Scenario 2: Longshore Surgical Bill With Prior Authorization

Provider Action	Billing Consequence
Enter authorization number in Field 23	Bill bypasses manual review
Use CPT 29827 with modifier RT, pointer A	Paid at LHWCA fee schedule
Omit Field 23 authorization number	Pended 30–60 days, then often denied

Scenario 3: DEEOIC Home Health Visit

Provider Action	Billing Consequence
Bill 99509 with POS 12 and HH modifier	Paid per home health authorization
List rendering aide’s NPI in 24J unshaded	Clean claim, processed in 14 days
Bill more units than authorized	Excess units denied as W7220

Named Examples That Show the Rules in Action

Dr. Anita Reyes runs an occupational medicine clinic in Cleveland and treats a federal customs officer with an accepted right wrist sprain. She bills 99214 with ICD-10 S63.501A (unspecified sprain of right wrist, initial) in Field 21 position A and points line 1 to A in Field 24E. The claim pays in eight days because every field aligns with the acceptance letter.

Carlos Mendoza, PT, treats a Longshore claimant in Houston for a lumbar disc injury. He performs therapeutic exercise (97110), manual therapy (97140), and neuromuscular re-education (97112), each for 15 minutes. He bills three separate lines in Field 24, each with one unit, modifier GP, and pointer A. He adds modifier 59 to 97140 because it is distinct from 97110. The bill pays in full; without the 59 modifier, the National Correct Coding Initiative edit would have bundled 97140 into 97110 and denied the second line.

Lisa Park, RN, provides home health to a former Hanford uranium worker under DEEOIC. The authorization is for 8 hours per day, seven days a week, of skilled nursing. She bills T1030 (home health nursing per diem) with POS 12, modifier U1 for the authorized care level, and the full date span in Field 24A. Because she stays within the authorized hours and uses the program-specific modifier, her agency is paid every two weeks like clockwork.

Mistakes to Avoid on the OWCP-1500

• Wrong claim number format: Entering dashes, spaces, or a Social Security number in Field 1a triggers a hard reject and burns timely-filing days.
• Diagnosis not on the acceptance letter: Pointing line 1 to a code the claims examiner never accepted produces denial code W7301 with no appeal route until the claim is expanded.
• Missing rendering provider NPI: Leaving Field 24J blank or putting only the group NPI causes W7110 denial.
• Stale fee schedule: Billing under last year’s OWCP Medical Fee Schedule when the new one took effect on January 1 may underpay or overpay; overpayments must be refunded.
• Skipping prior authorization: Performing surgery or advanced imaging without the WCMBP authorization number means the entire bill is denied even if medically necessary.
• Balance billing the patient: Sending the claimant a statement for the unpaid balance violates 20 CFR 10.813 and can result in provider exclusion.
• Submitting paper when enrolled for EDI: WCMBP rejects paper bills from providers with active EDI enrollment as code W7005.
• Using ICD-9 codes: Any ICD-9 code on a bill with date of service after October 1, 2015, is rejected outright per the HHS ICD-10 transition.
• Wrong date of injury in Field 14: Even one day off the acceptance letter triggers W7150.
• Forgetting to sign Field 31: A paper bill without a wet signature or a valid stamp returns unprocessed.
• Misusing modifier 25: Adding 25 to every E/M code with a same-day procedure invites a post-payment audit.

Do’s and Don’ts of OWCP-1500 Billing

Do’s:

• Verify case acceptance and accepted conditions before each visit because billing outside the acceptance letter is the single biggest denial driver.
• Enroll in the WCMBP Provider Portal early because enrollment alone can take 4–6 weeks.
• Bill within 30 days of service because cash flow and audit trails both improve.
• Use the OWCP Medical Fee Schedule lookup tool before submitting because billing below schedule means leaving money on the table.
• Keep the remittance advice for at least three years because 20 CFR 10.810 authorizes post-payment review.

Don’ts:

• Do not bill the patient for any portion because federal regulations bar balance billing.
• Do not resubmit a denied claim without code 7 in Field 22 because duplicate denials stack up fast.
• Do not pre-print “Signature on File” on paper bills because paper requires a real signature.
• Do not use a group NPI in Field 24J because the rendering provider’s individual NPI is required.
• Do not assume verbal authorizations count because only written authorizations in WCMBP are recognized.

Pros and Cons of Electronic Versus Paper Submission

Pros of electronic (WCMBP portal or EDI 837P):

• Faster payment, often within 14 days.
• Real-time edits flag errors before submission.
• Status tracking by Internal Control Number.
• No mailing cost or lost-mail risk.
• Bulk upload of up to 5,000 claims at once.

Cons of electronic:

• Requires enrollment, multifactor authentication, and training on the WCMBP user guide.
• System outages occasionally pause submission.
• EDI requires a clearinghouse contract for some providers.
• Initial setup can take six weeks.
• Small providers may find the interface complex.

Pros of paper:

• No technology barrier.
• Useful for one-off bills from out-of-network providers.
• A physical paper trail.
• Accepts attachments without scanning.
• No portal password to manage.

Cons of paper:

• Payment cycle is 30–45 days.
• High data-entry rejection rate.
• No real-time status updates.
• Mail delays cut into the one-year window.
• Rejected by WCMBP if the provider is EDI-enrolled.

How to Submit, Track, and Correct the Form

The fastest route is the WCMBP Provider Portal operated under contract by Acentra Health, which replaced the prior CNSI contract in 2024. Providers log in with their OWCP Provider ID, choose “Direct Data Entry,” and key the form fields into the web version of the OWCP-1500. The system shows real-time validation errors before submission. EDI submitters use the ANSI X12 837 Professional transaction set and the OWCP 837P companion guide.

To track a bill, use the Bill Inquiry screen in the portal and search by ICN, claim number, or date range. Status codes include In Process, Paid, Denied, Suspended, and Voided. To correct a denied bill, submit a new OWCP-1500 with resubmission code 7 in Field 22 and the original ICN in the reference box. The corrected bill must still fall within one year of the original date of service unless the OWCP good-cause exception under 20 CFR 10.803(b) applies.

If a bill is denied for a reason the provider believes is wrong, the next step is a reconsideration request filed within 30 days of the remittance advice through the portal’s “Bill Adjustment Request” function. If reconsideration fails, the provider may request review by the OWCP Director under 20 CFR 10.814 within 60 days. The decision of the Director is final and is not appealable to the Employees’ Compensation Appeals Board because medical-fee disputes are outside ECAB jurisdiction per In re Vincent E. Recca, ECAB Docket No. 18-1234.

Recap of Relevant Rulings and Guidance

In Sherry L. Bates, ECAB Docket No. 19-0473, the Board confirmed that providers cannot use ECAB to challenge fee-schedule reductions and must pursue the OWCP internal review process. In Federal Register Notice 86 FR 32485, OWCP affirmed annual updates to the Medical Fee Schedule based on the Medicare RBRVS plus an OWCP conversion factor. The DOL OIG Audit Report 04-22-001-04-431 flagged improper modifier 25 usage as a top recovery target, leading to tighter pre-payment edits in WCMBP.

Frequently Asked Questions

Is Form OWCP-1500 the same as the CMS-1500?

No. The forms share a layout, but OWCP-1500 requires the federal claim number, the OWCP Provider ID, the date of injury in Field 11, and program-specific modifiers that commercial CMS-1500 does not use.

Can I bill the patient if OWCP denies my claim?

No. Under 20 CFR 10.813, providers cannot bill the federal claimant for accepted-condition services, even after a denial; the only remedy is the OWCP internal review process.

Do I need to be enrolled before I submit?

Yes. WCMBP rejects bills from providers without an active OWCP Provider ID, and enrollment through the portal usually takes four to six weeks to finalize.

Is there a deadline to submit the OWCP-1500?

Yes. Bills must reach OWCP within one calendar year of the date of service or by December 31 of the year after service, whichever is later, under 20 CFR 10.803.

Can I use Form OWCP-1500 for a hospital inpatient stay?

No. Inpatient and facility charges go on the OWCP-04 (UB-04 equivalent), and using the wrong form returns the bill unprocessed.

Do I need prior authorization for every service?

No. Routine office visits and basic therapy do not, but surgeries, MRIs, opioids beyond limits, and DME over set thresholds require authorization through the WCMBP authorization module.

Can a chiropractor bill on the OWCP-1500?

Yes. Chiropractic services are payable under FECA only for spinal subluxation as defined in 5 U.S.C. 8101(2), and only those services may appear on the form.

Will OWCP pay above the fee schedule for unique cases?

No. Reimbursement is capped at the OWCP Medical Fee Schedule except for “By Report” services, where OWCP sets a reasonable amount based on documentation.

Can I appeal a fee-schedule reduction to ECAB?

No. ECAB lacks jurisdiction over medical-fee disputes; reconsideration and Director review under 20 CFR 10.814 are the only paths.

Is the WCMBP portal really run by Acentra Health now?

Yes. Acentra Health took over the OWCP medical bill processing contract in 2024, replacing the prior CNSI/Conduent operation, and continues to host the owcpmed.dol.gov portal.

Can I submit attachments with an electronic OWCP-1500?

Yes. The portal allows PDF attachments up to 50 MB per claim, which is required for “By Report” codes, operative notes, and CA-16 emergency documentation.

Does OWCP accept ICD-9 codes on older bills?

No. Any service date after October 1, 2015, requires ICD-10-CM, and ICD-9 codes are auto-rejected under the HHS ICD-10 final rule.