2018 ICD-10-CM Diagnosis Code O40


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 Non-Billable/Non-Specific Code
    Applicable To
    • Encounter for suspected maternal and fetal conditions not found
    Type 1 Excludes
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
    2018 ICD-10-CM Range O00-O9A

    Pregnancy, childbirth and the puerperium

    • 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 Code History
Code annotations containing back-references to O40:

Diagnosis Index entries containing back-references to 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.