2026 ICD-10-CM Diagnosis Code O22.30Deep phlebothrombosis in pregnancy, unspecified trimester
ICD-10-CM Codes›O00-O9A›O20-O29›O22
- Billable — Valid for Submission
- Not Chronic
O22.30 is a billable ICD-10-CM diagnosis code for deep phlebothrombosis in pregnancy, unspecified trimester. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 817 through 819, 831 through 833. The code is restricted by the Medicare Code Editor to maternity cases (age 9 through 64). Coders also document this condition as acute deep vein thrombosis during pregnancy. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute phlebitis; thrombophlebitis and thromboembolism and Other specified complications in pregnancy.
This medical diagnosis code is frequently used in OB/GYN medical specialties to designate conditions such maternal disorders related to pregnancy.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for O22.30.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute deep vein thrombosis during pregnancy
- Antepartum deep vein thrombosis
- Chronic deep vein thrombosis during pregnancy
- Phlegmasia alba dolens
- Phlegmasia alba dolens in pregnancy
- Venous complication of pregnancy
- Venous thrombosis in pregnancy
- White discoloration of skin
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Deep Vein Thrombosis
Deep vein thrombosis, or DVT, is a blood clot that forms in a vein deep in the body. Most deep vein clots occur in the lower leg or thigh. If the vein swells, the condition is called thrombophlebitis. A deep vein thrombosis can break loose and cause a serious problem in the lung, called a pulmonary embolism.
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Convert O22.30 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About O22.30Overview
Is O22.30 (Deep phlebothrombosis in pregnancy) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report deep phlebothrombosis in pregnancy, unspecified trimester on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does O22.30 group to?
When deep phlebothrombosis in pregnancy, unspecified trimester is the principal diagnosis on an inpatient stay, it groups to MS-DRG 817, 818, 819, 831, 832, 833, with relative weights from 0.5229 to 1.6880 depending on complications. Higher weights mean higher Medicare reimbursement.
Who can O22.30 be reported for?
The Medicare Code Editor checks deep phlebothrombosis in pregnancy, unspecified trimester against patient demographics: this code is intended for maternity cases (age 9 through 64). Claims outside these limits are flagged as inconsistent.
What is the ICD-9 equivalent of O22.30?
Under the General Equivalence Mappings, deep phlebothrombosis in pregnancy, unspecified trimester converts to ICD-9-CM 671.30 (deep thromb antepar-unsp). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
