Explore the ICD-10-CM code list with our advanced search tool
Browse a categorized list of ICD-10-CM codes organized by chapters based on body systems or medical conditions
Search current National Provider Identifier (NPI) records using our advanced NPI Lookup tool
Verify the validity of 10 & 15 position NPI numbers
Searchable Payer id code list - Comm, BCBS, MDCR, MDCD
Popular resource tools:
Learn how to complete HCFA-1500 Box 33b for billing provider secondary identification. Includes valid qualifiers (0B, 1G), 837P REF segment mapping, and when to use legacy IDs.
HCFA Box 33a on the CMS-1500 form captures the billing provider’s National Provider Identifier (NPI). Learn how this 10-digit number maps to the 2010AA NM109 element in the X12 837P claim transaction with a sample.
HCFA 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 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 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 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)
