O35 — Maternal care for known or suspected fetal abnormality and damage

Not billable

Is O35 billable?

No — O35 is a non-billable header code. O35 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 60 billable codes beneath O35.

Billable codes under this header

O35 at a glance

Code	O35
Description	Maternal care for known or suspected fetal abnormality and damage
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with O35 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

encounter for suspected maternal and fetal conditions ruled out (Z03.7-)

Code also

Two codes may be needed to describe the condition fully. Whether O35 is sequenced first depends on the reason for the encounter.

any associated maternal condition

Includes

Conditions classified to O35.

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

Excludes1 — never code together — inherited from Chapter 15

The conditions below can never be reported together with O35 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

supervision of normal pregnancy (Z34.-)

Use additional code — inherited from Chapter 15

Report an additional code alongside O35 to fully describe the condition. O35 is sequenced first.

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

Excludes2 — not included here — inherited from Chapter 15

The conditions below are not part of O35, but a patient may have both at the same time. When documentation supports it, O35 and the excluded code may both be reported.

mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
postpartum necrosis of pituitary gland (E23.0)
puerperal osteomalacia (M83.0)

What codes fall under O35? (18)

How long has O35 existed?

O35 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.