2020 ICD-10-CM Diagnosis Code O91.212

Nonpurulent mastitis associated with pregnancy, second trimester

    2016 2017 2018 2019 2020 Billable/Specific Code Maternity Dx (12-55 years) 2nd Trimester (14-28 weeks)
  • O91.212 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Nonpurulent mastitis assoc w pregnancy, second trimester
  • The 2020 edition of ICD-10-CM O91.212 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of O91.212 - other international versions of ICD-10 O91.212 may differ.
ICD-10-CM Coding Rules
  • O91.212 is applicable to maternity patients aged 12 - 55 years inclusive.
  • O91.212 is applicable to mothers in the second trimester of pregnancy, which is defined as between equal to or greater than 14 weeks to less than 28 weeks since the first day of the last menstrual period.
The following code(s) above O91.212 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 O91.212:
  • O00-O9A
    2020 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
    2020 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 2020 Non-Billable/Non-Specific Code
    Use Additional
    • code to identify infection
    Infections of breast associated with pregnancy, the puerperium and lactation
  • O91.21
    ICD-10-CM Diagnosis Code O91.21

    Nonpurulent mastitis associated with pregnancy

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Applicable To
    • Gestational interstitial mastitis
    • Gestational lymphangitis of breast
    • Gestational mastitis NOS
    • Gestational parenchymatous mastitis
    Nonpurulent mastitis associated with pregnancy
ICD-10-CM O91.212 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 817 Other antepartum diagnoses with o.r. Procedure with mcc
  • 818 Other antepartum diagnoses with o.r. Procedure with cc
  • 819 Other antepartum diagnoses with o.r. Procedure without cc/mcc
  • 831 Other antepartum diagnoses without o.r. Procedure with mcc
  • 832 Other antepartum diagnoses without o.r. Procedure with cc
  • 833 Other antepartum diagnoses without o.r. Procedure without cc/mcc

Convert O91.212 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
  • 2020 (effective 10/1/2019): No change
ICD-10-CM Codes Adjacent To O91.212
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
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

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