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. O16- Unspecified maternal hypertension
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code O16

2021 ICD-10-CM Diagnosis Code O16

Unspecified maternal hypertension

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • O16 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM O16 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of O16 - other international versions of ICD-10 O16 may differ.
The following code(s) above O16 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 O16:
  • 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 O16:
  • Includes: O15
    ICD-10-CM Diagnosis Code O15

    Eclampsia

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Includes
    • convulsions following conditions in O10-O14 and O16
ICD-10-CM Codes Adjacent To O16
O14.94 …… complicating childbirth
O14.95 …… complicating the puerperium
O15 Eclampsia
O15.0 Eclampsia complicating pregnancy
O15.00 …… unspecified trimester
O15.02 …… second trimester
O15.03 …… third trimester
O15.1 Eclampsia complicating labor
O15.2 Eclampsia complicating the puerperium
O15.9 Eclampsia, unspecified as to time period
O16 Unspecified maternal hypertension
O16.1 Unspecified maternal hypertension, first trimester
O16.2 Unspecified maternal hypertension, second trimester
O16.3 Unspecified maternal hypertension, third trimester
O16.4 Unspecified maternal hypertension, complicating childbirth
O16.5 Unspecified maternal hypertension, complicating the puerperium
O16.9 Unspecified maternal hypertension, unspecified trimester
O20 Hemorrhage in early pregnancy
O20.0 Threatened abortion
O20.8 Other hemorrhage in early pregnancy
O20.9 Hemorrhage in early pregnancy, unspecified

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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