O22.30 Deep phlebothrombosis in pregnancy, unspecified trimester

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from O22 Venous complications and hemorrhoids in pregnancy

Excludes1 (never code together)

• 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.-)

Applies from O22.3 Deep phlebothrombosis in pregnancy

Applicable to

• Deep vein thrombosis, antepartum

Use additional code

• code to identify the deep vein thrombosis (I82.4-, I82.5-, I82.62-, I82.72-)
• code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01)

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 671.30 Deep phlebothrombosis, antepartum, unspecified as to episode of care or not applicable (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O22.30

Back-references to O22

• Code First: I80 Phlebitis and thrombophlebitis ("phlebitis and thrombophlebitis complicating pregnancy, childbirth and the puerperium (O22.-, O87.-)")
• Code First: I82 Other venous embolism and thrombosis ("pregnancy, childbirth and the puerperium (O22.-, O87.-)")
• Type 2 Excludes: O87 Venous complications and hemorrhoids in the puerperium ("venous complications in pregnancy (O22.-)")
• Type 2 Excludes: O99.4 Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium ("venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-)")

Nearby codes

• O22.20 Superficial thrombophlebitis in pregnancy, unspecified trimester
• O22.21 Superficial thrombophlebitis in pregnancy, first trimester
• O22.22 Superficial thrombophlebitis in pregnancy, second trimester
• O22.23 Superficial thrombophlebitis in pregnancy, third trimester
• O22.3 Deep phlebothrombosis in pregnancy
• O22.30 Deep phlebothrombosis in pregnancy, unspecified trimester (this code)
• O22.31 Deep phlebothrombosis in pregnancy, first trimester
• O22.32 Deep phlebothrombosis in pregnancy, second trimester
• O22.33 Deep phlebothrombosis in pregnancy, third trimester
• O22.4 Hemorrhoids in pregnancy
• O22.40 Hemorrhoids in pregnancy, unspecified trimester