2021 ICD-10-CM Diagnosis Code O10

Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • O10 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • Short description: Pre-existing hypertension compl preg/chldbrth
  • The 2021 edition of ICD-10-CM O10 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of O10 - other international versions of ICD-10 O10 may differ.
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (O10) and the excluded code together.
  • pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (
    ICD-10-CM Diagnosis Code O11
    • O11 Pre-existing hypertension with pre-eclampsia
      • O11.1 Pre-existing hypertension with pre-eclampsia,...
      • O11.2 Pre-existing hypertension with pre-eclampsia,...
      • O11.3 Pre-existing hypertension with pre-eclampsia,...
      • O11.4 Pre-existing hypertension with pre-eclampsia,...
      • O11.5 Pre-existing hypertension with pre-eclampsia,...
      • O11.9 Pre-existing hypertension with pre-eclampsia,...
    O11.-
    )
Includes
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium
The following code(s) above O10 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 O10:
  • O00-O9A
    2021 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
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
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to O10:
  • Use Additional: O11
    ICD-10-CM Diagnosis Code O11

    Pre-existing hypertension with pre-eclampsia

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Includes
    • conditions in Ol0 complicated by pre-eclampsia
    • pre-eclampsia superimposed pre-existing hypertension
    Use Additional
    • code from O10 to identify the type of hypertension
ICD-10-CM Codes Adjacent To O10
O09.89 Supervision of other high risk pregnancies
O09.891 …… first trimester
O09.892 …… second trimester
O09.893 …… third trimester
O09.899 …… unspecified trimester
O09.9 Supervision of high risk pregnancy, unspecified
O09.90 …… unspecified trimester
O09.91 …… first trimester
O09.92 …… second trimester
O09.93 …… third trimester
O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
O10.0 Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium
O10.01 Pre-existing essential hypertension complicating pregnancy,
O10.011 …… first trimester
O10.012 …… second trimester
O10.013 …… third trimester
O10.019 …… unspecified trimester
O10.02 Pre-existing essential hypertension complicating childbirth
O10.03 Pre-existing essential hypertension complicating the puerperium
O10.1 Pre-existing hypertensive heart disease complicating pregnancy, childbirth and the puerperium
O10.11 Pre-existing hypertensive heart disease complicating pregnancy

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