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O99.512

Billable

Diseases of the respiratory system complicating pregnancy, second trimester

This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).

What This Code Means

A lung or breathing condition that occurs during the second three months of pregnancy (weeks 14-26) and affects the pregnancy.

Coding Tips

  • Verify documentation specifies second trimester timing; this is weeks 14-26 of gestation
  • Link with the underlying respiratory diagnosis code to provide complete clinical picture

Code Hierarchy

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