O00.522
✓ Billable
Left cornual ectopic pregnancy with intrauterine pregnancy
ICD-10-CM · FY2026 · Pregnancy, Childbirth and the Puerperium
Code
O00.522
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Pregnancy, Childbirth and the Puerperium
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Official coding notes
From CMS's ICD-10-CM Tabular List.
Includes
- ruptured ectopic pregnancy
Use additional code
- code from category O08 to identify any associated complication
Frequently asked questions
What is ICD-10 code O00.522?
ICD-10-CM code O00.522 represents Left cornual ectopic pregnancy with intrauterine pregnancy. It is a billable diagnosis code in the Pregnancy, Childbirth and the Puerperium chapter, effective October 1, 2025 – September 30, 2026.
Is O00.522 billable?
Yes. O00.522 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is O00.522 in?
O00.522 belongs to the Pregnancy, Childbirth and the Puerperium chapter (O00–O9A) of ICD-10-CM.
Related codes in the O00 category
O00
Ectopic pregnancy
Non-billable
O00.0
Abdominal pregnancy
Non-billable
O00.1
Tubal pregnancy
Non-billable
O00.2
Ovarian pregnancy
Non-billable
O00.3
Cesarean scar ectopic pregnancy
Non-billable
O00.4
Cervical ectopic pregnancy
Non-billable
O00.5
Cornual ectopic pregnancy
Non-billable
O00.8
Other ectopic pregnancy
Non-billable
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