DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

O23 Infections of genitourinary tract in pregnancy

  • Header · not billable

O23 is not billable. The category heads 36 billable codes in FY2027, grouped under 7 subdivisions.

Index → code

  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)cystitis → O23.1-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)pyelitis → O23.0-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)cervicitis → O23.51-

Where it sits

  1. Chapter 15 Pregnancy, childbirth and the puerperium (O00-O9A)
  2. O20-O29 Other maternal disorders predominantly related to pregnancy (O20-O29)
  3. O23 Infections of genitourinary tract in pregnancy
Billable codes
36
Subdivisions
7
CC / MCC codes
27 / 0
HCC V28 codes
0
New FY2027
0
Index entries
21

Codes in O23

  1. O23.0
    Infections of kidney in pregnancy
    Header
    Inclusion terms 1

    Inclusion terms

    • Pyelonephritis in pregnancy
  2. O23.00
    Infections of kidney in pregnancy, unspecified trimester
    Billable
  3. O23.01
    Infections of kidney in pregnancy, first trimester
    BillableCC
  4. O23.02
    Infections of kidney in pregnancy, second trimester
    BillableCC
  5. O23.03
    Infections of kidney in pregnancy, third trimester
    BillableCC
  6. O23.1
    Infections of bladder in pregnancy
    Header
  7. O23.10
    Infections of bladder in pregnancy, unspecified trimester
    Billable
  8. O23.11
    Infections of bladder in pregnancy, first trimester
    BillableCC
  9. O23.12
    Infections of bladder in pregnancy, second trimester
    BillableCC
  10. O23.13
    Infections of bladder in pregnancy, third trimester
    BillableCC
  11. O23.2
    Infections of urethra in pregnancy
    Header
  12. O23.20
    Infections of urethra in pregnancy, unspecified trimester
    Billable
  13. O23.21
    Infections of urethra in pregnancy, first trimester
    BillableCC
  14. O23.22
    Infections of urethra in pregnancy, second trimester
    BillableCC
  15. O23.23
    Infections of urethra in pregnancy, third trimester
    BillableCC
  16. O23.3
    Infections of other parts of urinary tract in pregnancy
    Header
  17. O23.30
    Infections of other parts of urinary tract in pregnancy, unspecified trimester
    Billable
  18. O23.31
    Infections of other parts of urinary tract in pregnancy, first trimester
    BillableCC
  19. O23.32
    Infections of other parts of urinary tract in pregnancy, second trimester
    BillableCC
  20. O23.33
    Infections of other parts of urinary tract in pregnancy, third trimester
    BillableCC
  21. O23.4
    Unspecified infection of urinary tract in pregnancy
    Header
  22. O23.40
    Unspecified infection of urinary tract in pregnancy, unspecified trimester
    Billable
  23. O23.41
    Unspecified infection of urinary tract in pregnancy, first trimester
    BillableCC
  24. O23.42
    Unspecified infection of urinary tract in pregnancy, second trimester
    BillableCC
  25. O23.43
    Unspecified infection of urinary tract in pregnancy, third trimester
    BillableCC
  26. O23.5
    Infections of the genital tract in pregnancy
    Header
  27. O23.51
    Infection of cervix in pregnancy
    Header
  28. O23.511
    Infections of cervix in pregnancy, first trimester
    BillableCC
  29. O23.512
    Infections of cervix in pregnancy, second trimester
    BillableCC
  30. O23.513
    Infections of cervix in pregnancy, third trimester
    BillableCC
  31. O23.519
    Infections of cervix in pregnancy, unspecified trimester
    Billable
  32. O23.52
    Salpingo-oophoritis in pregnancy
    Header
    Inclusion terms 2

    Inclusion terms

    • Oophoritis in pregnancy
    • Salpingitis in pregnancy
  33. O23.521
    Salpingo-oophoritis in pregnancy, first trimester
    BillableCC
  34. O23.522
    Salpingo-oophoritis in pregnancy, second trimester
    BillableCC
  35. O23.523
    Salpingo-oophoritis in pregnancy, third trimester
    BillableCC
  36. O23.529
    Salpingo-oophoritis in pregnancy, unspecified trimester
    Billable
  37. O23.59
    Infection of other part of genital tract in pregnancy
    Header
  38. O23.591
    Infection of other part of genital tract in pregnancy, first trimester
    BillableCC
  39. O23.592
    Infection of other part of genital tract in pregnancy, second trimester
    BillableCC
  40. O23.593
    Infection of other part of genital tract in pregnancy, third trimester
    BillableCC
  41. O23.599
    Infection of other part of genital tract in pregnancy, unspecified trimester
    Billable
  42. O23.9
    Unspecified genitourinary tract infection in pregnancy
    Header
    Inclusion terms 1

    Inclusion terms

    • Genitourinary tract infection in pregnancy NOS
  43. O23.90
    Unspecified genitourinary tract infection in pregnancy, unspecified trimester
    Billable
  44. O23.91
    Unspecified genitourinary tract infection in pregnancy, first trimester
    BillableCC
  45. O23.92
    Unspecified genitourinary tract infection in pregnancy, second trimester
    BillableCC
  46. O23.93
    Unspecified genitourinary tract infection in pregnancy, third trimester
    BillableCC

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At O23

Excludes2

  • gonococcal infections complicating pregnancy, childbirth and the puerperium (O98.2) O98.2
  • infections with a predominantly sexual mode of transmission NOS complicating pregnancy, childbirth and the puerperium (O98.3) O98.3
  • syphilis complicating pregnancy, childbirth and the puerperium (O98.1) O98.1
  • tuberculosis of genitourinary system complicating pregnancy, childbirth and the puerperium (O98.0) O98.0
  • venereal disease NOS complicating pregnancy, childbirth and the puerperium (O98.3) O98.3

Use additional code

  • code to identify organism (B95.-, B96.-) B95 B96

Notes that also apply

Block O20-O29 instructions (Excludes2 2): printed on the block page.

Chapter 15 instructions (Notes 6, Excludes1 1, Excludes2 4, Use additional code 1): printed on the chapter 15 page.

Index entries

  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)pyelitis → O23.0-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)cystitis → O23.1-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)urethritis → O23.2-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)cervicitis → O23.51-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)oophoritis → O23.52-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)salpingitis → O23.52-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)salpingo-oophoritis → O23.52-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)vaginitis or vulvitis → O23.59-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)genital tract infection → O23.9-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)kidney → O23.0-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abscess or cellulitisbladder → O23.1-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)bladder → O23.1-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)urethra → O23.2-
  • Infection, infected, infective (opportunistic)urinary (tract)complicatingpregnancy → O23.4-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)urinary (tract) → O23.4-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)abscess or cellulitisgenital organ or tract → O23.9-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)genital organ or tract → O23.9-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)genitourinary tract → O23.9-
  • Infection, infected, infective (opportunistic)urinary (tract)complicatingpregnancyspecified type NEC → O23.3-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)urinary (tract)specified NEC → O23.3-
  • Pregnancy (single) (uterine)complicated by (care of) (management affected by)infection(s)genital organ or tractspecified NEC → O23.59-

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy