Codes (Number (Percent)) Used to Identify Prenatal Care Encounters
| Code | Code Description | Pregnancies | Patients |
|---|---|---|---|
| O09.00 | Supervision of pregnancy with history of infertility, unspecified trimester | 3 (0) | 3 (0) |
| O09.01 | Supervision of pregnancy with history of infertility, first trimester | 6 (0) | 6 (0) |
| O09.02 | Supervision of pregnancy with history of infertility, second trimester | 5 (0) | 5 (0) |
| O09.03 | Supervision of pregnancy with history of infertility, third trimester | 11 (0) | 11 (0) |
| O09.10 | Supervision of pregnancy with history of ectopic pregnancy, unspecified trimester | 7 (0) | 7 (0) |
| O09.11 | Supervision of pregnancy with history of ectopic pregnancy, first trimester | 14 (0.1) | 14 (0.1) |
| O09.12 | Supervision of pregnancy with history of ectopic pregnancy, second trimester | 11 (0) | 11 (0) |
| O09.13 | Supervision of pregnancy with history of ectopic pregnancy, third trimester | 12 (0) | 12 (0) |
| O09.211 | Supervision of pregnancy with history of pre-term labor, first trimester | 53 (0.2) | 53 (0.2) |
| O09.212 | Supervision of pregnancy with history of pre-term labor, second trimester | 124 (0.5) | 123 (0.5) |
| O09.213 | Supervision of pregnancy with history of pre-term labor, third trimester | 133 (0.5) | 130 (0.5) |
| O09.219 | Supervision of pregnancy with history of pre-term labor, unspecified trimester | 36 (0.1) | 34 (0.1) |
| O09.291 | Supervision of pregnancy with other poor reproductive or obstetric history, first trimester | 153 (0.6) | 151 (0.6) |
| O09.292 | Supervision of pregnancy with other poor reproductive or obstetric history, second trimester | 198 (0.7) | 194 (0.7) |
| O09.293 | Supervision of pregnancy with other poor reproductive or obstetric history, third trimester | 247 (0.9) | 246 (0.9) |
| O09.299 | Supervision of pregnancy with other poor reproductive or obstetric history, unspecified trimester | 503 (1.9) | 480 (1.8) |
| O09.30 | Supervision of pregnancy with insufficient antenatal care, unspecified trimester | 417 (1.5) | 406 (1.5) |
| O09.31 | Supervision of pregnancy with insufficient antenatal care, first trimester | 12 (0) | 12 (0) |
| O09.32 | Supervision of pregnancy with insufficient antenatal care, second trimester | 949 (3.5) | 937 (3.5) |
| O09.33 | Supervision of pregnancy with insufficient antenatal care, third trimester | 1550 (5.7) | 1528 (5.7) |
| O09.40 | Supervision of pregnancy with grand multiparity, unspecified trimester | 45 (0.2) | 44 (0.2) |
| O09.41 | Supervision of pregnancy with grand multiparity, first trimester | 83 (0.3) | 81 (0.3) |
| O09.42 | Supervision of pregnancy with grand multiparity, second trimester | 184 (0.7) | 180 (0.7) |
| O09.43 | Supervision of pregnancy with grand multiparity, third trimester | 261 (1) | 255 (1) |
| O09.511 | Supervision of elderly primigravida, first trimester | 141 (0.5) | 139 (0.5) |
| O09.512 | Supervision of elderly primigravida, second trimester | 187 (0.7) | 187 (0.7) |
| O09.513 | Supervision of elderly primigravida, third trimester | 295 (1.1) | 290 (1.1) |
| O09.519 | Supervision of elderly primigravida, unspecified trimester | 44 (0.2) | 43 (0.2) |
| O09.521 | Supervision of elderly multigravida, first trimester | 906 (3.3) | 888 (3.3) |
| O09.522 | Supervision of elderly multigravida, second trimester | 1372 (5.1) | 1353 (5.1) |
| O09.523 | Supervision of elderly multigravida, third trimester | 1691 (6.2) | 1670 (6.3) |
| O09.529 | Supervision of elderly multigravida, unspecified trimester | 355 (1.3) | 347 (1.3) |
| O09.611 | Supervision of young primigravida, first trimester | 29 (0.1) | 29 (0.1) |
| O09.612 | Supervision of young primigravida, second trimester | 75 (0.3) | 74 (0.3) |
| O09.613 | Supervision of young primigravida, third trimester | 108 (0.4) | 106 (0.4) |
| O09.619 | Supervision of young primigravida, unspecified trimester | 21 (0.1) | 20 (0.1) |
| O09.621 | Supervision of young multigravida, first trimester | 24 (0.1) | 23 (0.1) |
| O09.622 | Supervision of young multigravida, second trimester | 20 (0.1) | 19 (0.1) |
| O09.623 | Supervision of young multigravida, third trimester | 44 (0.2) | 44 (0.2) |
| O09.629 | Supervision of young multigravida, unspecified trimester | 6 (0) | 6 (0) |
| O09.70 | Supervision of high risk pregnancy due to social problems, unspecified trimester | 23 (0.1) | 22 (0.1) |
| O09.71 | Supervision of high risk pregnancy due to social problems, first trimester | 29 (0.1) | 27 (0.1) |
| O09.72 | Supervision of high risk pregnancy due to social problems, second trimester | 49 (0.2) | 49 (0.2) |
| O09.73 | Supervision of high risk pregnancy due to social problems, third trimester | 82 (0.3) | 81 (0.3) |
| O09.811 | Supervision of pregnancy resulting from assisted reproductive technology, first trimester | 4 (0) | 4 (0) |
| O09.812 | Supervision of pregnancy resulting from assisted reproductive technology, second trimester | 2 (0) | 2 (0) |
| O09.813 | Supervision of pregnancy resulting from assisted reproductive technology, third trimester | 8 (0) | 8 (0) |
| O09.819 | Supervision of pregnancy resulting from assisted reproductive technology, unspecified trimester | 11 (0) | 11 (0) |
| O09.821 | Supervision of pregnancy with history of in utero procedure during previous pregnancy, first trimester | 1 (0) | 1 (0) |
| O09.891 | Supervision of other high risk pregnancies, first trimester | 290 (1.1) | 276 (1) |
| O09.892 | Supervision of other high risk pregnancies, second trimester | 559 (2.1) | 543 (2) |
| O09.893 | Supervision of other high risk pregnancies, third trimester | 1042 (3.8) | 1018 (3.8) |
| O09.899 | Supervision of other high risk pregnancies, unspecified trimester | 1045 (3.9) | 1011 (3.8) |
| O09.90 | Supervision of high risk pregnancy, unspecified, unspecified trimester | 844 (3.1) | 817 (3.1) |
| O09.91 | Supervision of high risk pregnancy, unspecified, first trimester | 1219 (4.5) | 1186 (4.5) |
| O09.92 | Supervision of high risk pregnancy, unspecified, second trimester | 2259 (8.3) | 2196 (8.2) |
| O09.93 | Supervision of high risk pregnancy, unspecified, third trimester | 3503 (12.9) | 3411 (12.8) |
| Z34.00 | Encounter for supervision of normal first pregnancy, unspecified trimester | 786 (2.9) | 773 (2.9) |
| Z34.01 | Encounter for supervision of normal first pregnancy, first trimester | 3085 (11.4) | 3058 (11.5) |
| Z34.02 | Encounter for supervision of normal first pregnancy, second trimester | 4583 (16.9) | 4514 (16.9) |
| Z34.03 | Encounter for supervision of normal first pregnancy, third trimester | 6266 (23.1) | 6148 (23.1) |
| Z34.80 | Encounter for supervision of other normal pregnancy, unspecified trimester | 2679 (9.9) | 2627 (9.9) |
| Z34.81 | Encounter for supervision of other normal pregnancy, first trimester | 6093 (22.5) | 5926 (22.2) |
| Z34.82 | Encounter for supervision of other normal pregnancy, second trimester | 9447 (34.8) | 9194 (34.5) |
| Z34.83 | Encounter for supervision of other normal pregnancy, third trimester | 12,316 (45.4) | 12,027 (45.2) |
| Z34.90 | Encounter for supervision of normal pregnancy, unspecified, unspecified trimester | 3675 (13.5) | 3610 (13.6) |
| Z34.91 | Encounter for supervision of normal pregnancy, unspecified, first trimester | 2578 (9.5) | 2502 (9.4) |
| Z34.92 | Encounter for supervision of normal pregnancy, unspecified, second trimester | 4467 (16.5) | 4365 (16.4) |
| Z34.93 | Encounter for supervision of normal pregnancy, unspecified, third trimester | 5855 (21.6) | 5725 (21.5) |