O99

Classification

Category:Pregnancy, childbirth and the puerperium

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Coding Guidance

O99 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail.

Inclusion Terms

conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

Excludes 1

From O00-O9A

supervision of normal pregnancyZ34

Excludes 2

From O00-O9A

mental and behavioral disorders associated with the puerperiumF53
obstetrical tetanusA34
postpartum necrosis of pituitary glandE23.0
puerperal osteomalaciaM83.0

Use Additional Code

From O00-O9A

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

More Specific Codes

O99.0

Anemia complicating pregnancy, childbirth and the puerperium

O99.1

Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium

O99.2

Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium

O99.3

Mental disorders and diseases of the nervous system complicating pregnancy, childbirth and the puerperium

O99.4

Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium

O99.5

Diseases of the respiratory system complicating pregnancy, childbirth and the puerperium

O99.6

Diseases of the digestive system complicating pregnancy, childbirth and the puerperium

O99.7

Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium

O99.8

Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium

External Resources

2025 ICD-10 guidelines from CMS.gov