| Code | Description |
| B | Signed signature authorization form or forms for both HCFA-1500 Claim form block 12 and block 13 are on file. |
| C | Signed HCFA-1500 Claim Form on file. |
| M | Signed signature authorization form for HCFA-1500 Claim Form block 13 on file |
| P | Signature generated by provider because the patient was not physically present for services. |
| S | Signed signature authorization form for HCFA-1500 Claim Form block 12 on file. |
