Is O16.3 a billable ICD-10 code?

Yes. O16.3 (Unspecified maternal hypertension, third trimester) is billable and can be used for insurance claims. Always verify payer-specific requirements.

O16.3 ✓ Billable

Unspecified maternal hypertension, third trimester

Q: What is ICD-10 code O16.3?

ICD-10-CM code O16.3 stands for "Unspecified maternal hypertension, third trimester". It is a billable code in the Pregnancy, Childbirth and the Puerperium chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

ICD-10-CM · FY2026 · Pregnancy, Childbirth and the Puerperium

Code

O16.3

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Pregnancy, Childbirth and the Puerperium

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code O16.3?

ICD-10-CM code O16.3 represents Unspecified maternal hypertension, third trimester. It is a billable diagnosis code in the Pregnancy, Childbirth and the Puerperium chapter, effective October 1, 2025 – September 30, 2026.

Is O16.3 billable?

Yes. O16.3 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is O16.3 in?

O16.3 belongs to the Pregnancy, Childbirth and the Puerperium chapter (O00–O9A) of ICD-10-CM.

Related codes in the O16 category

O16 Unspecified maternal hypertension Non-billable O16.1 Unspecified maternal hypertension, first trimester Billable O16.2 Unspecified maternal hypertension, second trimester Billable O16.4 Unspecified maternal hypertension, complicating childbirth Billable O16.5 Unspecified maternal hypertension, complicating the puerperium Billable O16.9 Unspecified maternal hypertension, unspecified trimester Billable

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