2021

  1. ICD-10-CM Codes
    2. ›
  2. O00-O9A Pregnancy, childbirth and the puerperium
    3. ›
  3. O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems
    4. ›
  4. O35- Maternal care for known or suspected fetal abnormality and damage
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code O35.0

2021 ICD-10-CM Diagnosis Code O35.0

Maternal care for (suspected) central nervous system malformation in fetus

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • O35.0 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • Short description: Maternal care for (suspected) cnsl malformation in fetus
  • The 2021 edition of ICD-10-CM O35.0 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of O35.0 - other international versions of ICD-10 O35.0 may differ.
Applicable To
  • Maternal care for fetal anencephaly
  • Maternal care for fetal hydrocephalus
  • Maternal care for fetal spina bifida
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (O35.0) and the excluded code together.
  • chromosomal abnormality in fetus (
    ICD-10-CM Diagnosis Code O35.1

    Maternal care for (suspected) chromosomal abnormality in fetus

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    O35.1
    )
The following code(s) above O35.0 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 O35.0:
  • 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
  • O35
    ICD-10-CM Diagnosis Code O35

    Maternal care for known or suspected fetal abnormality and damage

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Code Also
    • any associated maternal condition
    Includes
    • the listed conditions in the fetus as a reason for hospitalization or other obstetric care to the mother, or for termination of pregnancy
    Type 1 Excludes
    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
    Maternal care for known or suspected fetal abnormality and damage
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

Diagnosis Index entries containing back-references to O35.0:
  • 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)
      • fetal (maternal care for)
        • anencephaly O35.0
        • hydrocephalus O35.0
        • spina bifida O35.0

ICD-10-CM Codes Adjacent To O35.0
O34.80 …… unspecified trimester
O34.81 …… first trimester
O34.82 …… second trimester
O34.83 …… third trimester
O34.9 Maternal care for abnormality of pelvic organ, unspecified
O34.90 …… unspecified trimester
O34.91 …… first trimester
O34.92 …… second trimester
O34.93 …… third trimester
O35 Maternal care for known or suspected fetal abnormality and damage
O35.0 Maternal care for (suspected) central nervous system malformation in fetus
O35.0XX0 …… not applicable or unspecified
O35.0XX1 …… fetus 1
O35.0XX2 …… fetus 2
O35.0XX3 …… fetus 3
O35.0XX4 …… fetus 4
O35.0XX5 …… fetus 5
O35.0XX9 …… other fetus
O35.1 Maternal care for (suspected) chromosomal abnormality in fetus
O35.1XX0 …… not applicable or unspecified
O35.1XX1 …… fetus 1

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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