HCFA-1500 Box 33 - Billing Provider Info & Phone No
September 01, 2025HCFA Box 33 on the CMS-1500 form captures the billing provider’s name, address, and phone number. Learn how this data maps to the 2010AA loop in the X12 837P (NM1, N3, N4, PER04) with a clear example.
HCFA-1500 Box 32b - Other ID
September 01, 2025HCFA Box 32b on the CMS-1500 is for the Service Facility’s secondary (legacy) ID. See which qualifiers to use (0B, G2, LU) and how it maps to 2310C REF01/REF02 in the X12 837P, with an example (G2 54321).
HCFA-1500 Box 32a - NPI
August 31, 2025HCFA Box 32a on the CMS-1500 claim form is used to report the Service Facility NPI. Learn how to enter this 10-digit identifier and see how it maps to the 2310C NM109 element in the X12 837P electronic claim.
HCFA-1500 Box 32 - Service Facility Location Information
August 28, 2025HCFA-1500 Box 32 reports the service facility location when different from the billing provider. In the 837P 5010, it maps to loop 2310C (NM103, N301, N401, N402, N403)
HCFA-1500 Box 31 - Signature of Physician or Supplier Including Degrees or Credentials
August 25, 2025HCFA-1500 Box 31 captures the provider’s signature and date, certifying claim accuracy. In the 837P 5010, this maps to CLM06, typically reported as “Y” (signature on file).