Is ICD-10-CM code O13 billable?

No, O13 (Gestational [pregnancy-induced] hypertension without significant proteinuria) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code O13 belong to?

O13 belongs to Chapter 15 of the ICD-10-CM tabular list: O00–O9A (Pregnancy, Childbirth and the Puerperium).

O13Non-billable

Gestational [pregnancy-induced] hypertension without significant proteinuria

Pregnancy, Childbirth and the Puerperium·Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)·category·FY 2026

Use a more specific code (6 billable)

O13.1Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester O13.2Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester O13.3Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimester O13.4Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth O13.5Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium O13.9Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimester

CH15 Parent Instructions

Excludes1(Not coded here. Use a different code.)

supervision of normal pregnancy (Z34.-)

Excludes2(Not included here. Code separately if applicable.)

mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
postpartum necrosis of pituitary gland (E23.0)
puerperal osteomalacia (M83.0)

Use Additional Code

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Instructional Notes

Includes

gestational hypertension NOS
transient hypertension of pregnancy

Clinical Hierarchy

BillableHas subcodes

CH15Pregnancy, childbirth and the puerperium (O00-O9A)

O10-O16Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)

O13Gestational [pregnancy-induced] hypertension without significant proteinuriaNot billable

O13.1Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimesterBillable

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

O13.3Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimesterBillable

O13.4Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirthBillable

O13.5Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperiumBillable

O13.9Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimesterBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.