2021

  1. ICD-10-CM Codes
    2. ›
  2. O00-O9A Pregnancy, childbirth and the puerperium
    3. ›
  3. O10-O16 Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium
    4. ›
  4. O10- Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code O10.912

2021 ICD-10-CM Diagnosis Code O10.912

Unspecified pre-existing hypertension complicating pregnancy, second trimester

    2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years) 2nd Trimester (14-28 weeks)
  • O10.912 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Unsp pre-existing htn comp pregnancy, second trimester
  • The 2021 edition of ICD-10-CM O10.912 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of O10.912 - other international versions of ICD-10 O10.912 may differ.
ICD-10-CM Coding Rules
  • O10.912 is applicable to maternity patients aged 12 - 55 years inclusive.
  • O10.912 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 O10.912 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 O10.912:
  • 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
  • O10
    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
    Includes
    • pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium
    Type 2 Excludes
    • pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)
    Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
ICD-10-CM O10.912 is grouped within Diagnostic Related Group(s) (MS-DRG v38.0):
  • 817 Other antepartum diagnoses with o.r. Procedures with mcc
  • 818 Other antepartum diagnoses with o.r. Procedures with cc
  • 819 Other antepartum diagnoses with o.r. Procedures without cc/mcc
  • 831 Other antepartum diagnoses without o.r. Procedures with mcc
  • 832 Other antepartum diagnoses without o.r. Procedures with cc
  • 833 Other antepartum diagnoses without o.r. Procedures without cc/mcc

Convert O10.912 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
  • 2021 (effective 10/1/2020): No change
ICD-10-CM Codes Adjacent To O10.912
O10.41 Pre-existing secondary hypertension complicating pregnancy
O10.411 …… first trimester
O10.412 …… second trimester
O10.413 …… third trimester
O10.419 …… unspecified trimester
O10.42 Pre-existing secondary hypertension complicating childbirth
O10.43 Pre-existing secondary hypertension complicating the puerperium
O10.9 Unspecified pre-existing hypertension complicating pregnancy, childbirth and the puerperium
O10.91 Unspecified pre-existing hypertension complicating pregnancy
O10.911 …… first trimester
O10.912 …… second trimester
O10.913 …… third trimester
O10.919 …… unspecified trimester
O10.92 Unspecified pre-existing hypertension complicating childbirth
O10.93 Unspecified pre-existing hypertension complicating the puerperium
O11 Pre-existing hypertension with pre-eclampsia
O11.1 Pre-existing hypertension with pre-eclampsia, first trimester
O11.2 Pre-existing hypertension with pre-eclampsia, second trimester
O11.3 Pre-existing hypertension with pre-eclampsia, third trimester
O11.4 Pre-existing hypertension with pre-eclampsia, complicating childbirth
O11.5 Pre-existing hypertension with pre-eclampsia, complicating the puerperium

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

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