O40

Classification

Category:Pregnancy, childbirth and the puerperium

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Coding Guidance

O40 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Inclusion Terms

hydramnios

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

/codes/Z3A

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

More Specific Codes

O40.1

Polyhydramnios, first trimester

O40.2

Polyhydramnios, second trimester

O40.3

Polyhydramnios, third trimester

O40.9

Polyhydramnios, unspecified trimester

External Resources

2025 ICD-10 guidelines from CMS.gov