ICD-10-CM

Non-billable

O35

Classification

Category:Pregnancy, childbirth and the puerperium

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Coding Guidance

O35 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Inclusion Terms

the listed conditions in the fetus as a reason for hospitalization or other obstetric care to the mother, or for termination of pregnancy

Excludes 1

Z03.7

encounter for suspected maternal and fetal conditions ruled out

Z34

supervision of normal pregnancy

Excludes 2

F53

mental and behavioral disorders associated with the puerperium

A34

obstetrical tetanus

E23.0

postpartum necrosis of pituitary gland

M83.0

puerperal osteomalacia

Use Additional Code

O00-O9A

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known

More Specific Codes

O35.0

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

O35.1

Maternal care for (suspected) chromosomal abnormality in fetus

O35.2

Maternal care for (suspected) hereditary disease in fetus

O35.3

Maternal care for (suspected) damage to fetus from viral disease in mother

O35.4

Maternal care for (suspected) damage to fetus from alcohol

O35.5

Maternal care for (suspected) damage to fetus by drugs

O35.6

Maternal care for (suspected) damage to fetus by radiation

O35.7

Maternal care for (suspected) damage to fetus by other medical procedures

O35.8

Maternal care for other (suspected) fetal abnormality and damage

O35.9

Maternal care for (suspected) fetal abnormality and damage, unspecified

External Resources

2025 ICD-10 guidelines from CMS.gov