Is ICD-10-CM code O11 billable?

No, O11 (Pre-existing hypertension with pre-eclampsia) 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 O11 belong to?

O11 belongs to Chapter 15 of the ICD-10-CM tabular list: O00–O9A (Pregnancy, Childbirth and the Puerperium).

O11Non-billable

Pre-existing hypertension with pre-eclampsia

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)

O11.1Pre-existing hypertension with pre-eclampsia, first trimester O11.2Pre-existing hypertension with pre-eclampsia, second trimester O11.3Pre-existing hypertension with pre-eclampsia, third trimester O11.4Pre-existing hypertension with pre-eclampsia, complicating childbirth O11.5Pre-existing hypertension with pre-eclampsia, complicating the puerperium O11.9Pre-existing hypertension with pre-eclampsia, 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

conditions in O10 complicated by pre-eclampsia
pre-eclampsia superimposed pre-existing hypertension

Use Additional Code

code from O10 to identify the type of hypertension

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)

O11Pre-existing hypertension with pre-eclampsiaNot billable

O11.1Pre-existing hypertension with pre-eclampsia, first trimesterBillable

O11.2Pre-existing hypertension with pre-eclampsia, second trimesterBillable

O11.3Pre-existing hypertension with pre-eclampsia, third trimesterBillable

O11.4Pre-existing hypertension with pre-eclampsia, complicating childbirthBillable

O11.5Pre-existing hypertension with pre-eclampsia, complicating the puerperiumBillable

O11.9Pre-existing hypertension with pre-eclampsia, unspecified trimesterBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.