ICD-10-CM Codes
O00-O9A Pregnancy, childbirth and the puerperium
O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems
O36- Maternal care for other fetal problems
2021 ICD-10-CM Diagnosis Code O36.1

2021 ICD-10-CM Diagnosis Code O36.1

Maternal care for other isoimmunization

2016

2017

2018

2019

2020

2021

Non-Billable/Non-Specific Code

O36.1 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 O36.1 became effective on October 1, 2020.
This is the American ICD-10-CM version of O36.1 - other international versions of ICD-10 O36.1 may differ.

Applicable To

Maternal care for ABO isoimmunization

The following code(s) above O36.1 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 O36.1:

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
O36
ICD-10-CM Diagnosis Code O36
Maternal care for other fetal problems
Includes
- the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy
Type 1 Excludes
- encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
- placental transfusion syndromes (O43.0-)
Type 2 Excludes
- labor and delivery complicated by fetal stress (O77.-)
Maternal care for other fetal problems

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 O36.1:

Type 1 Excludes: O36.2
, R76.0

ICD-10-CM Diagnosis Code O36.2
Maternal care for hydrops fetalis
Applicable To
- Maternal care for hydrops fetalis NOS
- Maternal care for hydrops fetalis not associated with isoimmunization
Type 1 Excludes
- hydrops fetalis associated with ABO isoimmunization (O36.1-)
- hydrops fetalis associated with rhesus isoimmunization (O36.0-)
ICD-10-CM Diagnosis Code R76.0
Raised antibody titer
Type 1 Excludes
- isoimmunization in pregnancy (O36.0-O36.1)
- isoimmunization affecting newborn (P55.-)

ICD-10-CM Codes Adjacent To O36.1

O36.0935 …… fetus 5

O36.0939 …… other fetus

O36.099 Maternal care for other rhesus isoimmunization, unspecified trimester

O36.0990 …… not applicable or unspecified

O36.0991 …… fetus 1

O36.0992 …… fetus 2

O36.0993 …… fetus 3

O36.0994 …… fetus 4

O36.0995 …… fetus 5

O36.0999 …… other fetus

O36.1 Maternal care for other isoimmunization

O36.11 Maternal care for Anti-A sensitization

O36.111 Maternal care for Anti-A sensitization, first trimester

O36.1110 …… not applicable or unspecified

O36.1111 …… fetus 1

O36.1112 …… fetus 2

O36.1113 …… fetus 3

O36.1114 …… fetus 4

O36.1115 …… fetus 5

O36.1119 …… other fetus

O36.112 Maternal care for Anti-A sensitization, second trimester

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

2021 ICD-10-CM Diagnosis Code O36.1

Maternal care for other isoimmunization

Pregnancy, childbirth and the puerperium

Maternal care for other fetal problems

Maternal care for hydrops fetalis

Raised antibody titer