O13 — Gestational [pregnancy-induced] hypertension without significant proteinuria
Is O13 billable?
No — O13 is a non-billable header code. O13 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 6 billable codes beneath O13.
Billable codes under this header
- O13.1Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester
- O13.2Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester
- O13.3Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimester
- O13.4Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth
- O13.5Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium
- O13.9Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimester
O13 at a glance
| Code | O13 |
|---|---|
| Description | Gestational [pregnancy-induced] hypertension without significant proteinuria |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Includes
Conditions classified to O13.
- gestational hypertension NOS
- transient hypertension of pregnancy
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O13 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 O13 to fully describe the condition. O13 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 O13, but a patient may have both at the same time. When documentation supports it, O13 and the excluded code may both be reported.
What codes fall under O13? (6)
- O13.1Gestational [pregnancy-induced] hypertension without significant proteinuria, first trimester
- O13.2Gestational [pregnancy-induced] hypertension without significant proteinuria, second trimester
- O13.3Gestational [pregnancy-induced] hypertension without significant proteinuria, third trimester
- O13.4Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating childbirth
- O13.5Gestational [pregnancy-induced] hypertension without significant proteinuria, complicating the puerperium
- O13.9Gestational [pregnancy-induced] hypertension without significant proteinuria, unspecified trimester
How long has O13 existed?
O13 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.