O36.21 Maternal care for hydrops fetalis, first trimester

Non-billable ICD-10-CM code.

Applies from 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

Excludes1 (never code together)

• encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
• placental transfusion syndromes (O43.0-)

Excludes2 (not included here)

• labor and delivery complicated by fetal stress (O77.-)

7th character note

• One of the following 7th characters is to be assigned to each code under category O36. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O36 that has a 7th character of 1 through 9.

7th character required

• 0 — not applicable or unspecified
• 1 — fetus 1
• 2 — fetus 2
• 3 — fetus 3
• 4 — fetus 4
• 5 — fetus 5
• 9 — other fetus

Applies from O36.2 Maternal care for hydrops fetalis

Applicable to

• Maternal care for hydrops fetalis NOS
• Maternal care for hydrops fetalis not associated with isoimmunization

Excludes1 (never code together)

• hydrops fetalis associated with ABO isoimmunization (O36.1-)
• hydrops fetalis associated with rhesus isoimmunization (O36.0-)

Code annotations containing back-references to O36.21

Back-references to O36

• Type 2 Excludes: O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium ("when the reason for maternal care is that the disease is known or suspected to have affected the fetus (O35-O36)")
• Type 2 Excludes: O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium ("when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)")
• Type 1 Excludes: Z03.7 Encounter for suspected maternal and fetal conditions ruled out ("known or suspected fetal anomalies affecting management of mother, not ruled out (O26.-, O35.-, O36.-, O40.-, O41.-)")

Nearby codes

• O36.20X2 Maternal care for hydrops fetalis, unspecified trimester, fetus 2
• O36.20X3 Maternal care for hydrops fetalis, unspecified trimester, fetus 3
• O36.20X4 Maternal care for hydrops fetalis, unspecified trimester, fetus 4
• O36.20X5 Maternal care for hydrops fetalis, unspecified trimester, fetus 5
• O36.20X9 Maternal care for hydrops fetalis, unspecified trimester, other fetus
• O36.21 Maternal care for hydrops fetalis, first trimester (this code)
• O36.21X0 Maternal care for hydrops fetalis, first trimester, not applicable or unspecified
• O36.21X1 Maternal care for hydrops fetalis, first trimester, fetus 1
• O36.21X2 Maternal care for hydrops fetalis, first trimester, fetus 2
• O36.21X3 Maternal care for hydrops fetalis, first trimester, fetus 3
• O36.21X4 Maternal care for hydrops fetalis, first trimester, fetus 4