| O91 | Infections of breast associated with pregnancy, the puerperium and lactation |
| O910 | Infection of nipple associated with pregnancy, the puerperium and lactation |
| O9101 | Infection of nipple associated with pregnancy |
| O91011 | Infection of nipple associated with pregnancy, first trimester |
| O91012 | Infection of nipple associated w pregnancy, second trimester Infection of nipple associated with pregnancy, second trimester |
| O91013 | Infection of nipple associated with pregnancy, third trimester |
| O91019 | Infection of nipple associated with pregnancy, unspecified trimester |
| O9102 | Infection of nipple associated with the puerperium |
| O9103 | Infection of nipple associated with lactation |
| O911 | Abscess of breast assoc w pregnancy, the puerp and lactation Abscess of breast associated with pregnancy, the puerperium and lactation |
| O9111 | Abscess of breast associated with pregnancy |
| O91111 | Abscess of breast associated with pregnancy, first trimester Abscess of breast associated with pregnancy, first trimester |
| O91112 | Abscess of breast associated with pregnancy, second trimester |
| O91113 | Abscess of breast associated with pregnancy, third trimester Abscess of breast associated with pregnancy, third trimester |
| O91119 | Abscess of breast associated with pregnancy, unspecified trimester |
| O9112 | Abscess of breast associated with the puerperium |
| O9113 | Abscess of breast associated with lactation |
| O912 | Nonpurulent mastitis associated with pregnancy, the puerperium and lactation |
| O9121 | Nonpurulent mastitis associated with pregnancy |
| O91211 | Nonpurulent mastitis associated w pregnancy, first trimester Nonpurulent mastitis associated with pregnancy, first trimester |
| O91212 | Nonpurulent mastitis associated with pregnancy, second trimester |
| O91213 | Nonpurulent mastitis associated w pregnancy, third trimester Nonpurulent mastitis associated with pregnancy, third trimester |
| O91219 | Nonpurulent mastitis associated with pregnancy, unspecified trimester |
| O9122 | Nonpurulent mastitis associated with the puerperium |
| O9123 | Nonpurulent mastitis associated with lactation |
| O92 | Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium |
| O920 | Retracted nipple assoc w pregnancy, the puerp, and lactation Retracted nipple associated with pregnancy, the puerperium, and lactation |
| O9201 | Retracted nipple associated with pregnancy |
| O92011 | Retracted nipple associated with pregnancy, first trimester |
| O92012 | Retracted nipple associated with pregnancy, second trimester Retracted nipple associated with pregnancy, second trimester |
| O92013 | Retracted nipple associated with pregnancy, third trimester |
| O92019 | Retracted nipple associated with pregnancy, unspecified trimester |
| O9202 | Retracted nipple associated with the puerperium |
| O9203 | Retracted nipple associated with lactation |
| O921 | Cracked nipple associated with pregnancy, the puerperium, and lactation |
| O9211 | Cracked nipple associated with pregnancy |
| O92111 | Cracked nipple associated with pregnancy, first trimester |
| O92112 | Cracked nipple associated with pregnancy, second trimester |
| O92113 | Cracked nipple associated with pregnancy, third trimester |
| O92119 | Cracked nipple associated with pregnancy, unspecified trimester |
| O9212 | Cracked nipple associated with the puerperium |
| O9213 | Cracked nipple associated with lactation |
| O922 | Other and unspecified disorders of breast associated with pregnancy and the puerperium |
| O9220 | Unsp disorder of breast assoc w pregnancy and the puerperium Unspecified disorder of breast associated with pregnancy and the puerperium |
| O9229 | Oth disorders of breast assoc w pregnancy and the puerperium Other disorders of breast associated with pregnancy and the puerperium |
| O923 | Agalactia |
| O924 | Hypogalactia |
| O925 | Suppressed lactation |
| O926 | Galactorrhea |
| O927 | Other and unspecified disorders of lactation |