| R77 | Other abnormalities of plasma proteins | NON-BILLABLE CODE |
| R77.0 | Abnormality of albumin | BILLABLE CODE |
| R77.1 | Abnormality of globulin | BILLABLE CODE |
| R77.2 | Abnormality of alphafetoprotein | BILLABLE CODE |
| R77.8 | Other specified abnormalities of plasma proteins | BILLABLE CODE |
