Table 2.
Prevalence of the 36 morbidity groups and their corresponding ICD-9-CM codes, all pregnancy outcomesa
| Morbidity group | Frequency N (%) |
ICD-9-CM codes |
|---|---|---|
| Obstetric complications | ||
| Hemorrhage | ||
| Placenta previa without hemorrhage | 317 (0.84) | 641.0 |
| Antepartum hemorrhage | 1387 (3.67) | 641.1–641.3, 641.8–641.9, 762.0–762.1 |
| Postpartum hemorrhage | 874 (2.32) | 666.0–666.2, 639.1 |
| Obstetric trauma | ||
| Pelvic and perineal trauma | 2134 (5.65) | 654.3, 664.2–664.3, 664.5, 665.2–665.5, 665.7–665.9, 674.1–674.3, 674.8–674.9 (if live birth or still birth: 639.2) |
| Uterine rupture | 28 (0.07) | 665.0, 665.1 |
| Hypertensive disorders | ||
| Chronic hypertension | 1668 (4.42) | 401–405, 642.0, 642.1, 642.2, 760.0 |
| Pregnancy-induced hypertension | 1638 (4.34) | 642.3, 642.4, 642.5, 642.6, 642.7, 642.9 |
| Infection | ||
| Obstetric infection | 1724 (4.57) | 038.0–038.9, 041.0–041.9, 567.0–567.9, 614.3, 615.0–615.9, 639.0, 658.4, 659.3, 670.Xc, 672.X, 760.2, 762.7 |
| Urinary tract infection | 4519 (12.0) | 590.0–590.9, 595.0–595.9, 599.0, 646.5, 646.6 |
| Pneumonia | 201 (0.53) | 480.0–480.9, 481.X, 482.0–482.9, 483.X, 485.X, 486.X |
| Appendicitis | 36 (0.10) | 540.0–540.9, 541.X, 542.X |
| Infections not classified elsewhere | 263 (0.70) | 052.0–052.9, 070.0–070.9, 487.0–487.8 |
| Other | ||
| Abnormal glucose tolerance | 1327 (3.52) | 648.8 |
| Excess vomiting | 1515 (4.01) | 643.0–643.9 |
| Thrombophlebitis and embolism | 93 (0.25) | 415.1, 451.1, 671.3–671.5, 673.0–673.8 |
| Cerebrovascular disorders | 52 (0.14) | 430.X, 431.X, 432.0–432.9, 434.0–434.0, 436.X, 437.6, 674.0 |
| Disseminated intravascular coagulation | 112 (0.30) | 286.6–286.9, 666.3 |
| Breast disorders | 616 (1.63) | 611.0, 611.2, 675.0–675.9 |
| Complications of anesthesia | 125 (0.33) | 349.0, 668.X |
| Complications of spontaneous abortion | 348 (0.92) | 634.X, 637.X, 639.X |
| Complications of therapeutic abortion | 59 (0.16) | 635.X, 637.X, 639.X |
| Preexisting medical conditions | ||
| Nonhereditary, nonhemolytic anemia | 3614 (9.58) | 280.0–280.9, 281.0–281.9, 285.9, 648.2 |
| Hereditary hemolytic anemia | 341 (0.90) | 282.X |
| Clotting disorders | 189 (0.50) | 286.4, 287.3, 287.5 |
| Tuberculosis | 22 (0.06) | 010.0–010.9, 011.0–011.9, 012.0–012.8, 013.0–013.9, 014.0–014.9, 015.0–015.9, 016.0–016.9, 017.0–017.9, 018.0–018.9, 647.3 |
| HIV | 37 (0.10) | 042, 043, 044 |
| Diabetes in pregnancy | 1124 (2.98) | 250.0–250.9, 648.0 |
| Thyroid disorders | 638 (1.69) | 242.0–242.9, 648.1 |
| Gall bladder disease | 202 (0.54) | 574.0–574.9, 575.0–575.9 |
| Renal disease | 283 (0.75) | 580.0–580.9, 581.0–581.9, 582.0–582.9, 583.0–583.9, 585.X, 586.X, 592.0–592.9, 646.2, 760.1 |
| Liver disorders | 52 (0.14) | 571.0–571.9, 646.7 |
| Asthma | 1035 (2.74) | 493.X |
| Neurologic conditions | 38 (0.10) | 351.0, 646.4 |
| Cardiovascular condition | 684 (1.81) | 393.X, 394.0–394.9, 395.0–395.9, 396.0–396.9, 397.0–397.9, 398.0–398.9, 410.0–410.9, 413.0–413.9, 414.0, 424.0–424.9, 648.5–648.6, 441.0–441.9, 442.0–442.9 |
| Other chronic disease | 247 (0.65) | 135.X, 555.X, 556.X, 710.X, 714.X, 760.3, 760.8 |
| Mental health conditions | 2349 (6.22) | 295.0–295.9, 296.0–296.9, 297.0–297.9, 298.0–298.9, 300.0–300.9, 309.0, 309.1, 311.X, 648.4, E950–958 |
a
“X” in the place of the fourth digit means that each fourth and fifth digit of the code is included or that the code has no digits to the right of the decimal point.