2027 ICD-10-CM Diagnosis Code O36.80X2Pregnancy with inconclusive fetal viability, fetus 2

ICD-10-CM Codes›O00-O9A›O30-O48›O36

ICD-10-CM O36.80X2
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

O36.80X2 is a billable ICD-10-CM diagnosis code for pregnancy with inconclusive fetal viability, fetus 2. The 7th character 2 identifies fetus 2 in a multiple gestation pregnancy. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 817 through 819, 831 through 833. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64) and not accepted as a principal diagnosis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Maternal care related to fetal conditions.

Code Identity

ICD-10-CM Code
O36.80X2
Billable Status
Yes — Valid for Submission
Code Describes
Pregnancy with inconclusive fetal viability, fetus 2
Short Description
Pregnancy with inconclusive fetal viability, fetus 2
Same as the full description in the CMS dataset.
Parent Code
O36.80
Pregnancy with inconclusive fetal viability

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO30-O48Maternal care related to the fetus and amniotic cavity and possible delivery problems
CategoryO36Maternal care for other fetal problems
This CodeO36.80X2Pregnancy with inconclusive fetal viability, fetus 2

Code EditsBilling

Medicare Code Editor checks that affect claim validity for O36.80X2.

Maternity diagnoses
The Medicare Code Editor detects inconsistencies in maternity cases by checking a patient's age and any diagnosis on the patient's record. The maternity code edits apply to patients age ange is 9–64 years inclusive (e.g., diabetes in pregnancy, antepartum pulmonary complication).
Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O36.80X2: its own notes plus those printed at O36 and Chapter 15. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

From O36 Maternal care for other fetal problems applies to 399 codes
  • the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

From O36 Maternal care for other fetal problems applies to 399 codes
  • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
  • placental transfusion syndromes (O43.0-)
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • supervision of normal pregnancy (Z34.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From O36 Maternal care for other fetal problems applies to 399 codes
  • labor and delivery complicated by fetal stress (O77.-)
From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Notes

General instructions on how these codes are used.

From Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From O36 Maternal care for other fetal problems applies to 399 codes
  • One of the following 7th characters is to be assigned to each code under category O36. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O36 that has a 7th character of 1 through 9.
Values for category O36 Fetus Identification
  • 0not applicable or unspecified
  • 1fetus 1
  • 2fetus 2 this code
  • 3fetus 3
  • 4fetus 4
  • 5fetus 5
  • 9other fetus

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name O36.80X2, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming O36.80X2: they are not reported together with it, unless the two conditions are unrelated.

  • Z03.7 Encounter for suspected maternal and fetal conditions ruled out
    known or suspected fetal anomalies affecting management of mother, not ruled out (O26.-, O35.-, O36.-, O40.-, O41.-) names O36.-, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PRG013
Maternal care related to fetal conditions
Default principal diagnosis: inpatient No · outpatient Yes

Patient EducationClinical

Pregnancy

You're going to have a baby! It's an exciting time, but it can also feel a bit overwhelming. You may have a lot of questions, including what you can do to give your baby a healthy start. Taking care of your health while you're pregnant will help your fetus develop into a healthy baby. To do that, it's important to:

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert O36.80X2 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V23.87 Preg w incon fetl viabil
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O36.80X2Overview

What is the ICD-10 code for pregnancy with inconclusive fetal viability, fetus 2?

The ICD-10-CM code for pregnancy with inconclusive fetal viability, fetus 2 is O36.80X2 (sometimes written as O3680X2). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is O36.80X2 (Pregnancy with inconclusive fetal viability) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report pregnancy with inconclusive fetal viability, fetus 2 on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character 2 in O36.80X2 mean?

The final character 2 identifies the fetus in a multiple gestation pregnancy: this code reports pregnancy with inconclusive fetal viability for fetus 2.

What MS-DRG does O36.80X2 group to?

On inpatient claims, pregnancy with inconclusive fetal viability, fetus 2 maps to MS-DRG 833, 832, 831, 819, 818, 817, with relative weights from 0.5000 to 1.7586 depending on complications. Higher weights mean higher Medicare reimbursement.

Can O36.80X2 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because pregnancy with inconclusive fetal viability, fetus 2 describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.