2027 ICD-10-CM Diagnosis Code O00.12Interstitial ectopic pregnancy without intrauterine pregnancy

ICD-10-CM Codes›O00-O9A›O00-O08›O00

ICD-10-CM O00.12
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

O00.12 is a non-billable ICD-10-CM category code for interstitial ectopic pregnancy without intrauterine pregnancy, so it cannot be submitted on claims. Use a more specific code from this category instead, such as O00.121, O00.122, and O00.129.

Code Identity

ICD-10-CM Code
O00.12
Billable Status
No — Non-Billable Category
Code Describes
Interstitial ectopic pregnancy without intrauterine pregnancy
Short Description
Interstit ectopic pregnancy without intrauterine pregnancy
Parent Code
O00.1
Tubal pregnancy

Code Classification

ChapterO00-O9APregnancy, childbirth and the puerperium
SectionO00-O08Pregnancy with abortive outcome
CategoryO00Ectopic pregnancy
This CodeO00.12Interstitial ectopic pregnancy without intrauterine pregnancy

Specific Coding for Interstit ectopic pregnancy without intrauterine pregnancyOverview

Non-specific codes like O00.12 require more characters. Use one of these billable codes instead:

  • Use O00.121 for Right interstitial ectopic pregnancy without intrauterine pregnancy

  • Use O00.122 for Left interstitial ectopic pregnancy without intrauterine pregnancy

  • Use O00.129 for Unspecified interstitial ectopic pregnancy without intrauterine pregnancy

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to O00.12: its own notes plus those printed at O00, block O00-O08, 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 O00 Ectopic pregnancy applies to 34 codes
  • ruptured ectopic pregnancy

Excludes1

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

From Block O00-O08 Pregnancy with abortive outcome applies to 110 codes
  • continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)
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 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 O00 Ectopic pregnancy applies to 34 codes
  • code from category O08 to identify any associated complication
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

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

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name O00.12, its category, or a range that includes it.

Applicable To 1

These notes mention O00.12.

  • O08 Complications following ectopic and molar pregnancy
    This category is for use with categories O00-O02 to identify any associated complications names O00-O02, which includes this code

Excludes1 12

These codes carry an Excludes1 note naming O00.12: they are not reported together with it, unless the two conditions are unrelated.

  • N83.6 Hematosalpinx
    tubal pregnancy (O00.1-) names O00.1-, which includes this code
  • G08 Intracranial and intraspinal phlebitis and thrombophlebitis
    abortion, ectopic or molar pregnancy (O00-O07, O08.7) names O00-O07, which includes this code
  • K65 Peritonitis
    peritonitis with or following abortion or ectopic or molar pregnancy (O00-O07, O08.0) names O00-O07, which includes this code
  • Block N70-N77 Inflammatory diseases of female pelvic organs
    abortion or ectopic or molar pregnancy (O00-O07, O08.0) names O00-O07, which includes this code
  • R34 Anuria and oliguria
    anuria and oliguria complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4) names O00-O07, which includes this code
  • R55 Syncope and collapse
    shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • R57 Shock, not elsewhere classified
    shock complicating or following ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • T79.0 Air embolism (traumatic)
    air embolism complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • T79.1 Fat embolism (traumatic)
    abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • T79.4 Traumatic shock
    shock complicating abortion or ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • T81.1 Postprocedural shock
    shock following abortion or ectopic or molar pregnancy (O00-O07, O08.3) names O00-O07, which includes this code
  • T81.7 Vascular complications following a procedure, not elsewhere classified
    embolism complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code

Excludes2 6

These codes carry an Excludes2 note naming O00.12: its condition is not part of those codes, and both may be reported when the patient has both.

  • D65 Disseminated intravascular coagulation [defibrination syndrome]
    abortion or ectopic or molar pregnancy (O00-O07, O08.1) names O00-O07, which includes this code
  • D68 Other coagulation defects
    coagulation defects complicating abortion or ectopic or molar pregnancy (O00-O07, O08.1) names O00-O07, which includes this code
  • I26 Pulmonary embolism
    pulmonary embolism complicating abortion, ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • K72 Hepatic failure, not elsewhere classified
    hepatic failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • Block N17-N19 Acute kidney failure and chronic kidney disease
    renal failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.4) names O00-O07, which includes this code
  • Block N30-N39 Other diseases of the urinary system
    abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code

Code First 6

These codes say to code first a condition named in the note, and O00.12 is one of the conditions named.

  • I47 Paroxysmal tachycardia
    abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • I49 Other cardiac arrhythmias
    abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • I50 Heart failure
    heart failure complicating abortion or ectopic or molar pregnancy (O00-O07, O08.8) names O00-O07, which includes this code
  • I74 Arterial embolism and thrombosis
    embolism and thrombosis complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2) names O00-O07, which includes this code
  • I80 Phlebitis and thrombophlebitis
    if applicable: phlebitis and thrombophlebitis complicating abortion, ectopic or molar pregnancy (O00-O07, O08.7) names O00-O07, which includes this code
  • I82 Other venous embolism and thrombosis
    abortion, ectopic or molar pregnancy (O00-O07, O08.7) names O00-O07, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical InformationClinical

  • Pregnancy, Tubal

    the most common (>96%) type of ectopic pregnancy in which the extrauterine embryo implantation occurs in the fallopian tube, usually in the ampullary region where fertilization takes place.

Code HistoryHistory

FY 2027AddedAdded to the ICD-10-CM code setEffective October 1, 2026.
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About O00.12Overview

What is the ICD-10 code for interstitial ectopic pregnancy without intrauterine pregnancy?

O00.12 (sometimes written as O0012) is the ICD-10-CM category for interstitial ectopic pregnancy without intrauterine pregnancy, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is O00.12 (Tubal pregnancy) a billable code?

No. This is a category header that groups the codes for interstitial ectopic pregnancy without intrauterine pregnancy, and headers cannot be submitted on claims. Claims for interstitial ectopic pregnancy without intrauterine pregnancy need a more specific code from this category, such as O00.121, O00.122, and O00.129.

Can O00.12 be reported with a code from O31.1?

Not as a rule. The Excludes1 note at block O00-O08, which applies to O00.12, lists "continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does O00.12 need an additional code?

When the condition applies, yes. The Use Additional Code note at O00, which applies to O00.12, reads: code from category O08 to identify any associated complication. The additional code is reported after O00.12.