O10.012 — Pre-existing essential hypertension complicating pregnancy, second trimester
Is O10.012 billable?
Yes — O10.012 is billable for FY2027. O10.012 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. O10.012 may be submitted for encounters from October 1, 2026 through September 30, 2027.
O10.012 at a glance
| Code | O10.012 |
|---|---|
| Description | Pre-existing essential hypertension complicating pregnancy, second trimester |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does O10.012 group to?
O10.012 sits in MDC 14 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 817Other Antepartum Diagnoses with O.R. Procedures with MCCsurgical
- 818Other Antepartum Diagnoses with O.R. Procedures with CCsurgical
- 819Other Antepartum Diagnoses with O.R. Procedures without CC/MCCsurgical
As a secondary diagnosis, O10.012 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is O10.012 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O10.01, the nearest indexed parent of O10.012. Use them to find the family, then select the specific code.
- Hypertension, hypertensive › complicating › pregnancy › pre-existing › essential (accelerated) (benign) (essential) (idiopathic) (malignant) (systemic)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O10.012 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 O10.012 to fully describe the condition. O10.012 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 O10.012, but a patient may have both at the same time. When documentation supports it, O10.012 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O10
The conditions below are not part of O10.012, but a patient may have both at the same time. When documentation supports it, O10.012 and the excluded code may both be reported.
- pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)
How long has O10.012 existed?
O10.012 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.