ICD-10 · PDGM grouping
O23 Infections of genitourinary tract in pregnancy
All 36 codes in the O23 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.
ICD-10-CM FY2027 · CMS grouper v07.2.26
Codes in family
36
Can lead a claim
27
Cannot lead a claim
9
What CMS assigns to O23
27 of the 36 codes group to MMTA - Other; 9 are assigned no clinical group. None of the 36 is assigned a comorbidity subgroup. 27 of the 36 can lead a claim.
Every code in O23
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| O23.0 Infections of kidney in pregnancy | ||||
| O23.00 | Infections of kidney in pregnancy, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.01 | Infections of kidney in pregnancy, first trimester | Can lead a claim | A | None |
| O23.02 | Infections of kidney in pregnancy, second trimester | Can lead a claim | A | None |
| O23.03 | Infections of kidney in pregnancy, third trimester | Can lead a claim | A | None |
| O23.1 Infections of bladder in pregnancy | ||||
| O23.10 | Infections of bladder in pregnancy, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.11 | Infections of bladder in pregnancy, first trimester | Can lead a claim | A | None |
| O23.12 | Infections of bladder in pregnancy, second trimester | Can lead a claim | A | None |
| O23.13 | Infections of bladder in pregnancy, third trimester | Can lead a claim | A | None |
| O23.2 Infections of urethra in pregnancy | ||||
| O23.20 | Infections of urethra in pregnancy, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.21 | Infections of urethra in pregnancy, first trimester | Can lead a claim | A | None |
| O23.22 | Infections of urethra in pregnancy, second trimester | Can lead a claim | A | None |
| O23.23 | Infections of urethra in pregnancy, third trimester | Can lead a claim | A | None |
| O23.3 Infections of other parts of urinary tract in pregnancy | ||||
| O23.30 | Infections of other parts of urinary tract in pregnancy, unspecified trimesterCMS: Infections of prt urinary tract in pregnancy, unsp trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.31 | Infections of other parts of urinary tract in pregnancy, first trimesterCMS: Infect of prt urinary tract in pregnancy, first trimester | Can lead a claim | A | None |
| O23.32 | Infections of other parts of urinary tract in pregnancy, second trimesterCMS: Infect of prt urinary tract in pregnancy, second trimester | Can lead a claim | A | None |
| O23.33 | Infections of other parts of urinary tract in pregnancy, third trimesterCMS: Infect of prt urinary tract in pregnancy, third trimester | Can lead a claim | A | None |
| O23.4 Unspecified infection of urinary tract in pregnancy | ||||
| O23.40 | Unspecified infection of urinary tract in pregnancy, unspecified trimesterCMS: Unsp infection of urinary tract in pregnancy, unsp trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.41 | Unspecified infection of urinary tract in pregnancy, first trimesterCMS: Unsp infct of urinary tract in pregnancy, first trimester | Can lead a claim | A | None |
| O23.42 | Unspecified infection of urinary tract in pregnancy, second trimesterCMS: Unsp infct of urinary tract in pregnancy, second trimester | Can lead a claim | A | None |
| O23.43 | Unspecified infection of urinary tract in pregnancy, third trimesterCMS: Unsp infct of urinary tract in pregnancy, third trimester | Can lead a claim | A | None |
| O23.5 Infections of the genital tract in pregnancy | ||||
| O23.51 Infection of cervix in pregnancy | ||||
| O23.511 | Infections of cervix in pregnancy, first trimester | Can lead a claim | A | None |
| O23.512 | Infections of cervix in pregnancy, second trimester | Can lead a claim | A | None |
| O23.513 | Infections of cervix in pregnancy, third trimester | Can lead a claim | A | None |
| O23.519 | Infections of cervix in pregnancy, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.52 Salpingo-oophoritis in pregnancy | ||||
| O23.521 | Salpingo-oophoritis in pregnancy, first trimester | Can lead a claim | A | None |
| O23.522 | Salpingo-oophoritis in pregnancy, second trimester | Can lead a claim | A | None |
| O23.523 | Salpingo-oophoritis in pregnancy, third trimester | Can lead a claim | A | None |
| O23.529 | Salpingo-oophoritis in pregnancy, unspecified trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.59 Infection of other part of genital tract in pregnancy | ||||
| O23.591 | Infection of other part of genital tract in pregnancy, first trimesterCMS: Infection oth prt genitl trct in pregnancy, first trimester | Can lead a claim | A | None |
| O23.592 | Infection of other part of genital tract in pregnancy, second trimesterCMS: Infection oth prt genitl trct in pregnancy, second trimester | Can lead a claim | A | None |
| O23.593 | Infection of other part of genital tract in pregnancy, third trimesterCMS: Infection oth prt genitl trct in pregnancy, third trimester | Can lead a claim | A | None |
| O23.599 | Infection of other part of genital tract in pregnancy, unspecified trimesterCMS: Infection oth prt genital tract in pregnancy, unsp trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.9 Unspecified genitourinary tract infection in pregnancy | ||||
| O23.90 | Unspecified genitourinary tract infection in pregnancy, unspecified trimesterCMS: Unsp GU tract infection in pregnancy, unsp trimester | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| O23.91 | Unspecified genitourinary tract infection in pregnancy, first trimesterCMS: Unsp GU tract infection in pregnancy, first trimester | Can lead a claim | A | None |
| O23.92 | Unspecified genitourinary tract infection in pregnancy, second trimesterCMS: Unsp GU tract infection in pregnancy, second trimester | Can lead a claim | A | None |
| O23.93 | Unspecified genitourinary tract infection in pregnancy, third trimesterCMS: Unsp GU tract infection in pregnancy, third trimester | Can lead a claim | A | None |
Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.
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