O16.4 is the authoritative medical code for Unspecified maternal hypertension, complicating childbirth. This classification is used in medical billing and clinical recording to specify the clinical criteria for unspecified maternal hypertension, complicating childbirth (ICD-10-CM O16.4), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Unspecified maternal hypertension, complicating childbirth O16.4 is a billable ICD-10-CM diagnosis code, valid for claim submission. It is classified under category O16 (Unspecified maternal hypertension), within the Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium O10-O16 block, within Chapter 15, Pregnancy, Childbirth and the Puerperium O00-O9A. The official tabular list attaches no additional inclusion or exclusion notes to this code. Code selection within this family is differentiated by its related codes: O16.1 (Unspecified maternal hypertension, first trimester); O16.2 (Unspecified maternal hypertension, second trimester); O16.3 (Unspecified maternal hypertension, third trimester); O16.5 (Unspecified maternal hypertension, complicating the puerperium).
Codes in This Family (6)
Official ICD-10-CM classifications in the same code family as O16.4, with their registry titles.
- O16 — Unspecified maternal hypertension
- O16.1 — Unspecified maternal hypertension, first trimester
- O16.2 — Unspecified maternal hypertension, second trimester
- O16.3 — Unspecified maternal hypertension, third trimester
- O16.5 — Unspecified maternal hypertension, complicating the puerperium
- O16.9 — Unspecified maternal hypertension, unspecified trimester
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Hypertension, hypertensive (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic), complicating, childbirth (labor)
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code O11.4
Pre-existing hypertension with pre-eclampsia, complicating childbirth
ICD Code O13.4
Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth