How to fill the insurance claim form?


Editorial team Published on

You can find official instructions and standard layout guidelines through the National Uniform Claim Committee if you are using the standard medical CMS 1500 Claim Form Instructions Tool.

To fill out a standard health insurance claim form (such as the CMS-1500), break the process down into three main sections: patient demographics, treatment details, and provider information.

1. Patient and Subscriber Information (Top Section)

  • Payer Details: Enter the insurance company's name and claims mailing address at the top right.
  • Box 1 & 1A: Select the type of health plan (e.g., Medicare, Medicaid, Group Health) and enter the subscriber's member ID number from their insurance card.
  • Box 2 & 3: Enter the patient's full legal name (Last, First, Middle Initial), date of birth, and sex.
  • Box 4, 5, 6, & 7: Provide the primary insured's name, the patient's address and phone number, and the patient's relationship to the insured (self, spouse, child).
  • Box 12 & 13: Sign or write "Signature on File" (SOF) to authorize the release of medical information and assign medical benefits.

2. Treatment and Medical Details (Middle Section)

  • Box 21: Enter the official diagnostic codes using the correct indicator (such as ICD-10).
  • Box 24A-24J: Provide line-by-line service details:
    • Dates of service
    • Place of service code (e.g., 11 for office visits)
    • CPT/HCPCS procedure codes and any applicable modifiers
    • Diagnosis pointers (linking the service to the diagnosis letter in Box 21)
    • Charges and units for each procedure

3. Provider Information (Bottom Section)

  • Box 25: Enter the provider's federal Tax ID number (EIN or SSN).
  • Box 31: Provide the physician or supplier's signature and date.
  • Box 32 & 33: Include the service facility location address (if different) alongside the billing provider's office address and National Provider Identifier (NPI) number.