2021 ICD-10-CM Diagnosis Code O40

Polyhydramnios

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • O40 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 O40 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of O40 - other international versions of ICD-10 O40 may differ.
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as O40. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • encounter for suspected maternal and fetal conditions ruled out (
    ICD-10-CM Diagnosis Code Z03.7

    Encounter for suspected maternal and fetal conditions ruled out

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Encounter for suspected maternal and fetal conditions not found
    Type 1 Excludes
    Z03.7-
    )
Includes
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • hydramnios
The following code(s) above O40 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 O40:
  • 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
Clinical Information
  • A condition of abnormally high amniotic fluid volume, such as greater than 2,000 ml in the last trimester and usually diagnosed by ultrasonographic criteria (amniotic fluid index). It is associated with maternal diabetes mellitus; multiple pregnancy; chromosomal disorders; and congenital abnormalities.
  • An excess quantity of amniotic fluid in the amniotic sac as compared to normal values.
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 O40:
  • Type 1 Excludes: Z03.7
    ICD-10-CM Diagnosis Code Z03.7

    Encounter for suspected maternal and fetal conditions ruled out

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Encounter for suspected maternal and fetal conditions not found
    Type 1 Excludes

Diagnosis Index entries containing back-references to O40:
  • Pregnancy (single) (uterine) Z33.1
    - see also Delivery and Puerperal
    ICD-10-CM Diagnosis Code Z33.1

    Pregnant state, incidental

      2016 2017 2018 2019 2020 2021 Billable/Specific Code Maternity Dx (12-55 years)
    Applicable To
    • Pregnancy NOS
    • Pregnant state NOS
    Type 1 Excludes
    • complications of pregnancy (O00-O9A)
    • pregnant state, gestational carrier (Z33.3)
    • complicated by (care of) (management affected by)
      • polyhydramnios O40-

ICD-10-CM Codes Adjacent To O40
O36.92X5 …… fetus 5
O36.92X9 …… other fetus
O36.93 Maternal care for fetal problem, unspecified, third trimester
O36.93X0 …… not applicable or unspecified
O36.93X1 …… fetus 1
O36.93X2 …… fetus 2
O36.93X3 …… fetus 3
O36.93X4 …… fetus 4
O36.93X5 …… fetus 5
O36.93X9 …… other fetus
O40 Polyhydramnios
O40.1 Polyhydramnios, first trimester
O40.1XX0 …… not applicable or unspecified
O40.1XX1 …… fetus 1
O40.1XX2 …… fetus 2
O40.1XX3 …… fetus 3
O40.1XX4 …… fetus 4
O40.1XX5 …… fetus 5
O40.1XX9 …… other fetus
O40.2 Polyhydramnios, second trimester
O40.2XX0 …… not applicable or unspecified

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