O88.21 – Thromboembolism in pregnancy

ICD-10-CM 2027 diagnosis code · Complications predominantly related to the puerperium

Non-billable header

ICD-10-CM code O88.21

Code: O88.21 (claims format: O8821)
Description: Thromboembolism in pregnancy
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: O85-O92 Complications predominantly related to the puerperium
Parent codes: O88 › O88.2

Billable codes under O88.21

O88.21 is a header code and cannot be used on claims. Choose the most specific code:

Notes for O88.21

Applicable to:

Obstetric (pulmonary) embolism NOS

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O88 – Obstetric embolism

Excludes1 (not coded here):

embolism complicating abortion NOS (O03.2)
embolism complicating ectopic or molar pregnancy (O08.2)
embolism complicating failed attempted abortion (O07.2)
embolism complicating induced abortion (O04.7)
embolism complicating spontaneous abortion (O03.2, O03.7)

Block O85-O92

Excludes2 (not included here):

mental and behavioral disorders associated with the puerperium (F53.-)
obstetrical tetanus (A34)
puerperal osteomalacia (M83.0)

Index terms for O88.21

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O88.2

O88.22 – Thromboembolism in childbirthBillable
O88.23 – Thromboembolism in the puerperiumBillable

Frequently asked questions

What is ICD-10 code O88.21?

O88.21 is the ICD-10-CM code for thromboembolism in pregnancy, in the block O85-O92 (Complications predominantly related to the puerperium).

Is O88.21 a billable code?

No. O88.21 is a header code with more specific child codes; report one of the billable codes listed above.

What category does O88.21 belong to?

It belongs to category O88 – Obstetric embolism.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.