Can I mail the copy AttachKit fills in?

Only if your payer accepts a plain printout. For paper claims, Medicare and many insurers require the original OCR-scannable CMS-1500 printed in Flint OCR Red ink — a home-printed black-and-white copy can be returned as unprocessable. Use AttachKit to prepare and proofread, then print onto a red-ink form you bought from a forms supplier, ComplyRight, or the GPO, or submit electronically as an 837P.

Does AttachKit submit the CMS-1500 to Medicare or my insurer?

No. AttachKit fills the PDF in your browser and never transmits it. You print and mail the completed form yourself, or file the electronic 837P equivalent through your clearinghouse or billing system.

What is the deadline to file a CMS-1500 claim?

It depends on the payer. Medicare requires claims within 12 months (one calendar year) of the date of service; Medicaid and commercial insurers set their own timely-filing windows, often 90 to 365 days. Check your specific payer's rule — missing the window usually means the claim is denied.

CMS-1500 vs UB-04 — which one do I use?

Use the CMS-1500 (02/12) for professional/non-institutional services: physicians, suppliers, and most outpatient providers. The UB-04 (CMS-1450) is for institutional billers like hospitals and facilities. If a clinician's professional services are being billed, the CMS-1500 is almost always the right form.

General · CMS-1500

Fill the CMS-1500 claim form online — free, on your device

The CMS-1500 (02/12) is the standard paper claim form that non-institutional health care providers — physicians, suppliers, and other professional providers — use to bill Medicare, Medicaid, TRICARE, and most commercial insurers. It is designed and maintained by the National Uniform Claim Committee (NUCC), and the completed form goes to the patient's payer or Medicare Administrative Contractor, not to NUCC or CMS directly. One honest caveat: like the IRS red-ink forms, the official version submitted on paper must be the OCR-scannable original printed in Flint OCR Red ink, which you buy from a forms supplier, ComplyRight, or the Government Printing Office — the downloadable image "may not print to scale" and payers can reject a home-printed copy. AttachKit is useful for preparing your entries, reviewing a claim, or printing onto a pre-purchased red-ink form: bring your blank PDF and AttachKit auto-fills common fields — patient name, insured's ID, provider name and NPI — on your device, in your browser. AttachKit does not submit the claim to any payer, and this page is general information, not billing, legal, or medical advice.

Your PDF never leaves your browser — open DevTools → Network and watch: the file is never uploaded.

Who needs it: Medical billers, small clinics, solo practitioners, and self-billing providers who prepare professional health-insurance claims use the CMS-1500. Patients occasionally use it too, to file their own out-of-network reimbursement claim when an insurer asks for it. If your payer accepts only electronic claims (the 837P), you would submit through a clearinghouse instead of mailing this paper form.

Need a blank CMS-1500? Download from the source, then drop it in below.

Save your details once — supported forms auto-fill

Save your name, address, and other common fields once. Then open the blank CMS-1500 in the form filler below — AttachKit maps what it can from your saved profile, right in your browser with nothing uploaded.

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Why fill it here

Your claim data and PDF stay in your browser — the file is never uploaded to a server, which matters when the form carries patient PHI and insurance IDs.
Auto-fills the repetitive, error-prone fields — insured's ID number, patient and provider names, NPI, and dates — so you can print cleanly onto a pre-purchased red-ink form.
Lets you save a filled reference copy on-device to proofread box 24 service lines, diagnosis pointers, and totals before you commit to the scannable original.
Free to fill unlimited forms (10 signed PDFs/mo on the free tier).

Fill your CMS-1500 now

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CMS-1500 questions, answered

Can I mail the copy AttachKit fills in?: Only if your payer accepts a plain printout. For paper claims, Medicare and many insurers require the original OCR-scannable CMS-1500 printed in Flint OCR Red ink — a home-printed black-and-white copy can be returned as unprocessable. Use AttachKit to prepare and proofread, then print onto a red-ink form you bought from a forms supplier, ComplyRight, or the GPO, or submit electronically as an 837P.
Does AttachKit submit the CMS-1500 to Medicare or my insurer?: No. AttachKit fills the PDF in your browser and never transmits it. You print and mail the completed form yourself, or file the electronic 837P equivalent through your clearinghouse or billing system.
What is the deadline to file a CMS-1500 claim?: It depends on the payer. Medicare requires claims within 12 months (one calendar year) of the date of service; Medicaid and commercial insurers set their own timely-filing windows, often 90 to 365 days. Check your specific payer's rule — missing the window usually means the claim is denied.
CMS-1500 vs UB-04 — which one do I use?: Use the CMS-1500 (02/12) for professional/non-institutional services: physicians, suppliers, and most outpatient providers. The UB-04 (CMS-1450) is for institutional billers like hospitals and facilities. If a clinician's professional services are being billed, the CMS-1500 is almost always the right form.

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AttachKit is a private, independent tool for filling and signing PDFs on your own device. It is not a government agency, law firm, or filing service, and is not affiliated with or endorsed by the IRS, USCIS, the U.S. Department of State, or any government body. Forms are provided for convenience — always download the current version and instructions from the official .gov website, and your completed document never leaves your browser.