O10 — Pre-existing hypertension complicating pregnancy, childbirth and the puerperium

Not billable

Is O10 billable?

No — O10 is a non-billable header code. O10 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 36 billable codes beneath O10.

Billable codes under this header

O10 at a glance

Code	O10
Description	Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes2 — not included here

The conditions below are not part of O10, but a patient may have both at the same time. When documentation supports it, O10 and the excluded code may both be reported.

pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)

Includes

Conditions classified to O10.

pre-existing hypertension with pre-existing proteinuria complicating pregnancy, childbirth and the puerperium

Excludes1 — never code together — inherited from Chapter 15

The conditions below can never be reported together with O10 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

supervision of normal pregnancy (Z34.-)

Use additional code — inherited from Chapter 15

Report an additional code alongside O10 to fully describe the condition. O10 is sequenced first.

code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Excludes2 — not included here — inherited from Chapter 15

The conditions below are not part of O10, but a patient may have both at the same time. When documentation supports it, O10 and the excluded code may both be reported.

mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
postpartum necrosis of pituitary gland (E23.0)
puerperal osteomalacia (M83.0)

What codes fall under O10? (6)

How long has O10 existed?

O10 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.