Gestational [pregnancy-induced] hypertension without significant proteinuria (O13) ICD-10-CM
The O13 code range covers gestational [pregnancy-induced] hypertension without significant proteinuria with 7 ICD-10-CM diagnosis codes. 6 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Includes
This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
- gestational hypertension NOS
- transient hypertension of pregnancy
Codes in the O13 Range 7 codes · 6 billable
- O13 Gestational [pregnancy-induced] hypertension without significant proteinuriaNon-billable
- O13.1 Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester
- O13.2 Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester
- O13.3 Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimester
- O13.4 Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth
- O13.5 Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium
- O13.9 Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimester
About the O13 Code Range
Gestational hypertension is pregnancy-induced high blood pressure without significant protein in the urine.
O13 separates the first, second, and third trimesters into O13.1, O13.2, and O13.3. Other subdivisions identify hypertension complicating childbirth (O13.4) or the period after childbirth (O13.5). O13.9 identifies an unspecified trimester.
Questions About This Page
How many billable codes are in the O13 range?
Of the 7 codes in this range, 6 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the O13 range classify?
The range classifies gestational [pregnancy-induced] hypertension without significant proteinuria. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
