2019 ICD-10-CM Diagnosis Code O91

Infections of breast associated with pregnancy, the puerperium and lactation

    2016 2017 2018 2019 Non-Billable/Non-Specific Code
  • O91 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • Short description: Infect of breast assoc w pregnancy, the puerp and lactation
  • The 2019 edition of ICD-10-CM O91 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of O91 - other international versions of ICD-10 O91 may differ.
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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
The following code(s) above O91 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to O91:
  • O00-O9A
    2019 ICD-10-CM Range O00-O9A

    Pregnancy, childbirth and the puerperium

    Note
    • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
    • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
    • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
    • 1st trimester- less than 14 weeks 0 days
    • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
    • 3rd trimester- 28 weeks 0 days until delivery
    Type 1 Excludes
    • supervision of normal pregnancy (Z34.-)
    Type 2 Excludes
    • mental and behavioral disorders associated with the puerperium (F53.-)
    • obstetrical tetanus (A34)
    • postpartum necrosis of pituitary gland (E23.0)
    • puerperal osteomalacia (M83.0)
    Use Additional
    • code from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
    Pregnancy, childbirth and the puerperium
  • O85-O92
    2019 ICD-10-CM Range O85-O92

    Complications predominantly related to the puerperium

    Type 2 Excludes
    • mental and behavioral disorders associated with the puerperium (F53.-)
    • obstetrical tetanus (A34)
    • puerperal osteomalacia (M83.0)
    Complications predominantly related to the puerperium
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
Code annotations containing back-references to O91:
  • Type 1 Excludes: N61
    ICD-10-CM Diagnosis Code N61

    Inflammatory disorders of breast

      2016 2017 - Deleted Code 2017 - New Code 2018 2019 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • inflammatory carcinoma of breast (C50.9)
    • inflammatory disorder of breast associated with childbirth (O91.-)
    • neonatal infective mastitis (P39.0)
    • thrombophlebitis of breast [Mondor's disease] (I80.8)
ICD-10-CM Codes Adjacent To O91
O90.1 Disruption of perineal obstetric wound
O90.2 Hematoma of obstetric wound
O90.3 Peripartum cardiomyopathy
O90.4 Postpartum acute kidney failure
O90.5 Postpartum thyroiditis
O90.6 Postpartum mood disturbance
O90.8 Other complications of the puerperium, not elsewhere classified
O90.81 Anemia of the puerperium
O90.89 Other complications of the puerperium, not elsewhere classified
O90.9 Complication of the puerperium, unspecified
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

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.