ICD-10-CM 2027
ICD-10 code for gestational hypertension
Gestational [pregnancy-induced] hypertension without significant proteinuria
From the official ICD-10-CM alphabetic index entry “Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic) › gestational (without significant proteinuria) (pregnancy-induced) (transient)”. Page updated September 29, 2026.
About coding gestational hypertension
The ICD-10-CM code for gestational hypertension is O13 (Gestational [pregnancy-induced] hypertension without significant proteinuria). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on O13.
To report this condition, pick the subcode that matches the documentation: O13.1 (first trimester), O13.2 (second trimester), O13.3 (third trimester), O13.4 (complicating childbirth), O13.5 (complicating the puerperium) and O13.9 (unspecified trimester).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific gestational hypertension codes (official index)
Common questions about gestational hypertension ICD-10 codes
What is the ICD-10 code for gestational hypertension?
- O13 — Gestational [pregnancy-induced] hypertension without significant proteinuria (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: O13.4, O13.5.
Is O13 billable?
- No. O13 is a header code. Report one of its more specific subcodes instead.