O13 ICD-10-CM Code: Gestational [pregnancy-induced] hypertension without significant proteinuria
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Pregnancy, childbirth and the puerperium (O00-O9A) / Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)
O13
Header CodeICD-10-CMOfficial ICD-10-CMCodebook guidanceGestational [pregnancy-induced] hypertension without significant proteinuria
Gestational [pregnancy-induced] hypertension without significant proteinuria
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
N/A—
Not mapped
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialICD-10-CM does not list inclusion terms for O13 in this effective period.
Excludes 2
OfficialICD-10-CM does not list Excludes 2 notes for O13 in this effective period.
Related Child Codes
Includes
Official- gestational hypertension NOS
- transient hypertension of pregnancy
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for O13 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for O13 in this effective period.
Use Additional
OfficialICD-10-CM does not list Use Additional Code instructions for O13 in this effective period.
Code Also
OfficialICD-10-CM does not list Code Also instructions for O13 in this effective period.
Buddy Documentation Tip
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
- Code
- O13
- Description
- Gestational [pregnancy-induced] hypertension without significant proteinuria
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF
- —
- Billable
- No
- Payment year
- 2026
Coder workflow notes
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What This Code Means
O13 is the ICD-10-CM diagnosis code for gestational [pregnancy-induced] hypertension without significant proteinuria. O13 sits in the ICD-10-CM chapter for pregnancy, childbirth and the puerperium (o00-o9a), within the section covering edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (o10-o16).
O13 is a non-billable category for gestational [pregnancy-induced] hypertension without significant proteinuria. Move through the official child-code path until the documented detail supports a reportable code.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for O13 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •O13 is a non-billable category for gestational [pregnancy-induced] hypertension without significant proteinuria. Move through the official child-code path until the documented detail supports a reportable code.
- •For this DOS, capture the provider's current assessment and the care action documented for gestational [pregnancy-induced] hypertension without significant proteinuria. Keep the checklist tied to the note.
- •Do not swap O13 with O13.1. The FY2026 tabular describes O13.1 as gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester. Follow the documented detail.
- •Ask Buddy to show the official notes for O13 or compare its code path with O13.1.
Includes
- gestational hypertension NOS
- transient hypertension of pregnancy