ICD-10-CM Codes
O00-O9A
O85-O92
Infections of breast associated with pregnancy, the puerperium and lactation O91

Infections of breast associated with pregnancy, the puerperium and lactation O91-

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Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.

code to identify infection

Codes

O91 Infections of breast associated with pregnancy, the puerperium and lactation
- O91.0 Infection of nipple associated with pregnancy, the puerperium and lactation
  - O91.01 Infection of nipple associated with pregnancy
    - O91.011 …… first trimester
    - O91.012 …… second trimester
    - O91.013 …… third trimester
    - O91.019 …… unspecified trimester
  - O91.02 Infection of nipple associated with the puerperium
  - O91.03 Infection of nipple associated with lactation
- O91.1 Abscess of breast associated with pregnancy, the puerperium and lactation
  - O91.11 Abscess of breast associated with pregnancy
    - O91.111 …… first trimester
    - O91.112 …… second trimester
    - O91.113 …… third trimester
    - O91.119 …… unspecified trimester
  - O91.12 Abscess of breast associated with the puerperium
  - O91.13 Abscess of breast associated with lactation
- O91.2 Nonpurulent mastitis associated with pregnancy, the puerperium and lactation
  - O91.21 Nonpurulent mastitis associated with pregnancy
    - O91.211 …… first trimester
    - O91.212 …… second trimester
    - O91.213 …… third trimester
    - O91.219 …… unspecified trimester
  - O91.22 Nonpurulent mastitis associated with the puerperium
  - O91.23 Nonpurulent mastitis associated with lactation