O22.21 – Superficial thrombophlebitis in pregnancy, first trimester

ICD-10-CM 2027 diagnosis code · Other maternal disorders predominantly related to pregnancy

Billable code

ICD-10-CM code O22.21
Code
O22.21 (claims format: O2221)
Description
Superficial thrombophlebitis in pregnancy, first trimester
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block
O20-O29 Other maternal disorders predominantly related to pregnancy
Parent codes
O22 › O22.2

Notes inherited from parent codes

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

O22 – Venous complications and hemorrhoids in pregnancy

Excludes1 (not coded here):
  • venous complications of:
  • abortion NOS (O03.9)
  • ectopic or molar pregnancy (O08.7)
  • failed attempted abortion (O07.35)
  • induced abortion (O04.85)
  • spontaneous abortion (O03.89)
Excludes2 (not included here):
  • obstetric pulmonary embolism (O88.-)
  • venous complications and hemorrhoids of childbirth and the puerperium (O87.-)

O22.2 – Superficial thrombophlebitis in pregnancy

Applicable to:
  • Phlebitis in pregnancy NOS
  • Thrombophlebitis of legs in pregnancy
  • Thrombosis in pregnancy NOS
Use additional code:
  • code to identify the superficial thrombophlebitis (I80.0-)

Block O20-O29

Excludes2 (not included here):
  • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
  • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)

Related codes in O22.2

Frequently asked questions

What is ICD-10 code O22.21?

O22.21 is the ICD-10-CM code for superficial thrombophlebitis in pregnancy, first trimester, in the block O20-O29 (Other maternal disorders predominantly related to pregnancy).

Is O22.21 a billable code?

Yes. O22.21 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O22.21 belong to?

It belongs to category O22 – Venous complications and hemorrhoids in pregnancy.

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.