O10.0 is the authoritative medical code for Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium. This classification is used in medical billing and clinical recording to specify the clinical criteria for pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium (ICD-10-CM O10.0), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium is a non-billable ICD-10-CM category code O10.0. A more specific billable subcode must be selected for claims submission. Includes: pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium. Inclusion terms: Any condition in I10 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium. Excludes2 (not included here): pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium O11.-.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for O10.0 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium
Inclusion Terms
Alternative terms the tabular list files under this code.
- Any condition in I10 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium O11.-
Frequently Asked Questions (FAQ) & Clinical Guidance
Can O10.0 be billed directly?
No. O10.0 (Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Can O10.0 be reported alongside related conditions?
Per Excludes2 instructions, O10.0 and the following may both be reported when both are present: pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-).
What conditions are included under O10.0?
Pre-existing essential hypertension complicating pregnancy, childbirth and the puerperium includes: Any condition in I10 specified as a reason for obstetric care during pregnancy, childbirth or the puerperium.
Codes in This Family (7)
Official ICD-10-CM classifications in the same code family as O10.0, with their registry titles.
- O10.01 — Pre-existing essential hypertension complicating pregnancy
- O10.011 — Pre-existing essential hypertension complicating pregnancy, first trimester
- O10.012 — Pre-existing essential hypertension complicating pregnancy, second trimester
- O10.013 — Pre-existing essential hypertension complicating pregnancy, third trimester
- O10.019 — Pre-existing essential hypertension complicating pregnancy, unspecified trimester
- O10.02 — Pre-existing essential hypertension complicating childbirth
- O10.03 — Pre-existing essential hypertension complicating the puerperium
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 O07.0
Genital tract and pelvic infection following failed attempted termination of pregnancy
ICD Code O08.0
Genital tract and pelvic infection following ectopic and molar pregnancy