| Z3A.20 | 20 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.21 | 21 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.22 | 22 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.23 | 23 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.24 | 24 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.25 | 25 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.26 | 26 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.27 | 27 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.28 | 28 weeks gestation of pregnancy | BILLABLE CODE |
| Z3A.29 | 29 weeks gestation of pregnancy | BILLABLE CODE |
