Medical Billing Resource
Medical Billing Resource Center
A practical reference library for professional and institutional claim forms, electronic 837P files, acknowledgments, identifiers, code lookups and submission workflows.
Reviewed November 2026 · Educational reference — verify payer and program requirements.
Medical billing reference centers
Built around the questions people search while preparing real claims: what goes in a field, which form to use, where an identifier belongs, how to print, how an electronic file is structured, and what an acknowledgment means.
Claim Denial Codes
Lookup common CARC and RARC codes, with practical next steps and official X12 references.
Open lookup →CMS-1500 Printer Calibration
Printable ruler and measured alignment corrections for professional claim form printing.
Open tool →Medicare Ambulance Estimate
Ground ambulance payment estimates using verified locality inputs and published 2026 rates.
Open estimator →Excel / CSV Import Preview
Check the mapping of spreadsheet columns to common professional-claim fields without upload.
Preview a file →CMS-1500 Resource Center
Box-by-box field guide, printing, PDF reference, error checker, identifiers and professional claim workflow.
Open resource →UB-04 / CMS-1450 Guide
Field-by-field form locator map for institutional paper claims with focused guides for common locators.
Open resource →837P Electronic Claims
File structure, envelopes, loops, claims, service lines, 999, 277CA and submission workflow.
Open resource →CMS-485 Resource Center
Home-health plan-of-care guides, certification periods, diagnoses, orders, printing and checklist.
Open resource →Medical Billing Glossary
Individual definitions for the billing terms that appear in claim forms, EDI and payer responses.
Open resource →NPI / TIN / EIN Guide
Provider identifier vs tax identifier, billing vs rendering NPI, and CMS-1500 field placement.
Open resource →Place of Service Codes
Crawlable CMS POS code reference plus an interactive search tool.
Open resource →Submission Workflows
CMS-1500, UB-04, 837P, clearinghouse vs direct submission and post-submission flow.
Open resource →Free Cheat Sheets
Printable CMS-1500, UB-04, 837P, acknowledgment, CMS-485 and identifier references.
Open resource →Free Billing Tools
Claim checker, field lookup, form selector, NPI validator, POS lookup, 837P viewer and response reader.
Open resource →Built to be useful before a purchase
The resource center is intentionally broader than the software catalog. A user can arrive through a specific Google search — such as “CMS-1500 Box 24J,” “UB-04 patient control number,” “NPI vs TIN,” “what is a 277CA,” or “place of service 11” — get a complete answer, and then move naturally to the appropriate software or free tool if it solves the next step.