2019 ICD-10-CM Diagnosis Code O91.23

Nonpurulent mastitis associated with lactation

    2016 2017 2018 2019 Billable/Specific Code Maternity Dx (12-55 years) Female Dx
  • O91.23 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2019 edition of ICD-10-CM O91.23 became effective on October 1, 2018.
  • This is the American ICD-10-CM version of O91.23 - other international versions of ICD-10 O91.23 may differ.
ICD-10-CM Coding Rules
  • O91.23 is applicable to maternity patients aged 12 - 55 years inclusive.
  • O91.23 is applicable to female patients.
Applicable To
  • Interstitial mastitis associated with lactation
  • Lymphangitis of breast associated with lactation
  • Mastitis NOS associated with lactation
  • Parenchymatous mastitis associated with lactation
The following code(s) above O91.23 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 O91.23:
  • 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
  • O91
    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
    Use Additional
    • code to identify infection
    Infections of breast associated with pregnancy, the puerperium and lactation
Approximate Synonyms
  • Mastitis (breast inflammation) during lactation
  • Nonpurulent left mastitis during lactation
  • Nonpurulent mastitis during lactation
  • Nonpurulent right mastitis during lactation
ICD-10-CM O91.23 is grouped within Diagnostic Related Group(s) (MS-DRG v36.0):
  • 769 Postpartum and post abortion diagnoses with o.r. Procedure
  • 776 Postpartum and post abortion diagnoses without o.r. Procedure

Convert O91.23 to ICD-9-CM

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

Diagnosis Index entries containing back-references to O91.23:
  • Mastitis (acute) (diffuse) (nonpuerperal) (subacute) N61.0
    ICD-10-CM Diagnosis Code N61.0

    Mastitis without abscess

      2017 - New Code 2018 2019 Billable/Specific Code
    Applicable To
    • Infective mastitis (acute) (nonpuerperal) (subacute)
    • Mastitis (acute) (nonpuerperal) (subacute) NOS
    • Cellulitis (acute) (nonpuerperal) (subacute) of breast NOS
    • Cellulitis (acute) (nonpuerperal) (subacute) of nipple NOS
  • Puerperal, puerperium (complicated by, complications)
    • galactophoritis O91.22
      ICD-10-CM Diagnosis Code O91.22

      Nonpurulent mastitis associated with the puerperium

        2016 2017 2018 2019 Billable/Specific Code Maternity Dx (12-55 years) Female Dx
      Applicable To
      • Puerperal interstitial mastitis
      • Puerperal lymphangitis of breast
      • Puerperal mastitis NOS
      • Puerperal parenchymatous mastitis
      • associated with lactation O91.23
    • lymphangitis O86.89
      ICD-10-CM Diagnosis Code O86.89

      Other specified puerperal infections

        2016 2017 2018 2019 Billable/Specific Code Maternity Dx (12-55 years) Female Dx
      • breast O91.22
        ICD-10-CM Diagnosis Code O91.22

        Nonpurulent mastitis associated with the puerperium

          2016 2017 2018 2019 Billable/Specific Code Maternity Dx (12-55 years) Female Dx
        Applicable To
        • Puerperal interstitial mastitis
        • Puerperal lymphangitis of breast
        • Puerperal mastitis NOS
        • Puerperal parenchymatous mastitis
        • associated with lactation O91.23
    • mammitis O91.22
      ICD-10-CM Diagnosis Code O91.22

      Nonpurulent mastitis associated with the puerperium

        2016 2017 2018 2019 Billable/Specific Code Maternity Dx (12-55 years) Female Dx
      Applicable To
      • Puerperal interstitial mastitis
      • Puerperal lymphangitis of breast
      • Puerperal mastitis NOS
      • Puerperal parenchymatous mastitis
      • associated with lactation O91.23
    • mastitis O91.22
      ICD-10-CM Diagnosis Code O91.22

      Nonpurulent mastitis associated with the puerperium

        2016 2017 2018 2019 Billable/Specific Code Maternity Dx (12-55 years) Female Dx
      Applicable To
      • Puerperal interstitial mastitis
      • Puerperal lymphangitis of breast
      • Puerperal mastitis NOS
      • Puerperal parenchymatous mastitis
      • associated with lactation O91.23

ICD-10-CM Codes Adjacent To O91.23
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
O92 Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium
O92.0 Retracted nipple associated with pregnancy, the puerperium, and lactation
O92.01 Retracted nipple associated with pregnancy
O92.011 …… first trimester
O92.012 …… second trimester
O92.013 …… third trimester
O92.019 …… unspecified trimester
O92.02 Retracted nipple associated with the puerperium
O92.03 Retracted nipple associated with lactation
O92.1 Cracked nipple associated with pregnancy, the puerperium, and lactation

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