O13.2 Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester

Billable ICD-10-CM code, FY2026.

Applies from O13 Gestational [pregnancy-induced] hypertension without significant proteinuria

Includes

• gestational hypertension NOS
• transient hypertension of pregnancy

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 642.31 Transient hypertension of pregnancy, delivered , with or without mention of antepartum condition (approximate)
• 642.32 Transient hypertension of pregnancy, delivered, with mention of postpartum complication (approximate)
• 642.33 Transient hypertension of pregnancy, antepartum condition or complication (approximate)
• 642.34 Transient hypertension of pregnancy, postpartum condition or complication (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O13.2

Back-references to O13

• Type 1 Excludes: I10 Essential (primary) hypertension ("hypertensive disease complicating pregnancy, childbirth and the puerperium (O10-O11, O13-O16)")
• Type 2 Excludes: O99.4 Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium ("hypertensive disorders (O10-O16)")

Nearby codes

• O13 Gestational [pregnancy-induced] hypertension without significant proteinuria
• O13.1 Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester
• O13.2 Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester (this code)
• 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