All ICD10 Codes

O16

Non-Billable
ChapterO00–O9A
Rankcategory
Official Description

Unspecified maternal hypertension

Use a more specific code (6 billable)
O16.1Unspecified maternal hypertension, first trimesterO16.2Unspecified maternal hypertension, second trimesterO16.3Unspecified maternal hypertension, third trimesterO16.4Unspecified maternal hypertension, complicating childbirthO16.5Unspecified maternal hypertension, complicating the puerperiumO16.9Unspecified maternal hypertension, unspecified trimester
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 15: Pregnancy, Childbirth and the Puerperium (O00-O9A).

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.

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)
O16Unspecified maternal hypertensionNot billable
O16.1Unspecified maternal hypertension, first trimesterBillable
O16.2Unspecified maternal hypertension, second trimesterBillable
O16.3Unspecified maternal hypertension, third trimesterBillable
O16.4Unspecified maternal hypertension, complicating childbirthBillable
O16.5Unspecified maternal hypertension, complicating the puerperiumBillable
O16.9Unspecified maternal hypertension, unspecified trimesterBillable

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to O16:

chapterCH15
Pregnancy, childbirth and the puerperium (O00-O9A)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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