Is ICD-10-CM code O15 billable?

No, O15 (Eclampsia) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code O15 belong to?

O15 belongs to Chapter 15 of the ICD-10-CM tabular list: O00–O9A (Pregnancy, Childbirth and the Puerperium).

O15Not billable, use a more specific code below

Eclampsia

In Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16), chapter 15: Pregnancy, Childbirth and the Puerperium

6 billable codes under O15: 4 are an MCC; none map to an HCC.A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment.

Instructional notes

Includes: conditions that are coded here

convulsions following conditions in O10-O14 and O16

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Coding of obstetric cases with O00-O9A codes: sequencing priority, trimester and fetus characters, principal diagnosis selection, delivery outcome, and pregnancy-related complications.

General Rules for Obstetric Cases (page 63)
Selection of OB Principal or First-listed Diagnosis (page 64)
Pre-existing conditions versus conditions due to the pregnancy (page 65)
Pre-existing hypertension in pregnancy (page 66)
Fetal Conditions Affecting the Management of the Mother (page 66)
HIV Infection in Pregnancy, Childbirth and the Puerperium (page 66)
Diabetes mellitus in pregnancy (page 66)
Long term use of insulin and oral hypoglycemics (page 67)

Read Section I.C.15 (page 63), 11 more topics

All codes under O15

O15 can't be used on a claim. Pick a billable code below; grey headings group them.

O15 MS-DRGs

As the principal diagnosis, the billable codes under O15 group to these 8 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

DRG 817 Other Antepartum Diagnoses with O.R. Procedures with MCC (5 of 6 codes)
DRG 818 Other Antepartum Diagnoses with O.R. Procedures with CC (5 of 6 codes)
DRG 819 Other Antepartum Diagnoses with O.R. Procedures without CC/MCC (5 of 6 codes)
DRG 831 Other Antepartum Diagnoses without O.R. Procedures with MCC (5 of 6 codes)
DRG 832 Other Antepartum Diagnoses without O.R. Procedures with CC (5 of 6 codes)
DRG 833 Other Antepartum Diagnoses without O.R. Procedures without CC/MCC (5 of 6 codes)
DRG 769 Postpartum and Post Abortion Diagnoses with O.R. Procedures (1 of 6 codes)
DRG 776 Postpartum and Post Abortion Diagnoses without O.R. Procedures (1 of 6 codes)

Other codes that refer to O15

Notes on these codes point to O15.

I16.1 Code Also: eclampsia (O15.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

High Blood Pressure in Pregnancy

Blood pressure is the force of your blood pushing against the walls of your arteries. Your arteries are blood vessels that carry blood from your heart to other parts of your body. High blood pressure, or hypertension, is blood pressure that is higher than normal. Having high blood pressure can put you at risk for other health problems, such as heart disease, heart attack, and stroke.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.