2020 ICD-10-CM Diagnosis Code O43.021

Fetus-to-fetus placental transfusion syndrome, first trimester

    2016 2017 2018 2019 2020 Billable/Specific Code Maternity Dx (12-55 years) 1st Trimester (< 14 weeks)
  • O43.021 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Fetus-to-fetus placental transfuse syndrome, first trimester
  • The 2020 edition of ICD-10-CM O43.021 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of O43.021 - other international versions of ICD-10 O43.021 may differ.
ICD-10-CM Coding Rules
  • O43.021 is applicable to maternity patients aged 12 - 55 years inclusive.
  • O43.021 is applicable to mothers in the first trimester of pregnancy, which is defined as less than 14 weeks since the first day of the last menstrual period.
The following code(s) above O43.021 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 O43.021:
  • O00-O9A
    2020 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
  • O43
    ICD-10-CM Diagnosis Code O43

    Placental disorders

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    • maternal care for poor fetal growth due to placental insufficiency (O36.5-)
    • placenta previa (O44.-)
    • placental polyp (O90.89)
    • placentitis (O41.14-)
    • premature separation of placenta [abruptio placentae] (O45.-)
    Placental disorders
ICD-10-CM O43.021 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 817 Other antepartum diagnoses with o.r. Procedure with mcc
  • 818 Other antepartum diagnoses with o.r. Procedure with cc
  • 819 Other antepartum diagnoses with o.r. Procedure without cc/mcc
  • 831 Other antepartum diagnoses without o.r. Procedure with mcc
  • 832 Other antepartum diagnoses without o.r. Procedure with cc
  • 833 Other antepartum diagnoses without o.r. Procedure without cc/mcc

Convert O43.021 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
ICD-10-CM Codes Adjacent To O43.021
O42.919 …… unspecified trimester
O42.92 Full-term premature rupture of membranes, unspecified as to length of time between rupture and onset of labor
O43 Placental disorders
O43.0 Placental transfusion syndromes
O43.01 Fetomaternal placental transfusion syndrome
O43.011 …… first trimester
O43.012 …… second trimester
O43.013 …… third trimester
O43.019 …… unspecified trimester
O43.02 Fetus-to-fetus placental transfusion syndrome
O43.021 …… first trimester
O43.022 …… second trimester
O43.023 …… third trimester
O43.029 …… unspecified trimester
O43.1 Malformation of placenta
O43.10 Malformation of placenta, unspecified
O43.101 …… first trimester
O43.102 …… second trimester
O43.103 …… third trimester
O43.109 …… unspecified trimester
O43.11 Circumvallate placenta

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