I87.099 Postthrombotic syndrome with other complications of unspecified lower extremity

Billable ICD-10-CM code, FY2026.

Applies from I87.0 Postthrombotic syndrome

Applicable to

• Chronic venous hypertension due to deep vein thrombosis
• Postphlebitic syndrome

Excludes1 (never code together)

• chronic venous hypertension without deep vein thrombosis (I87.3-)

MS-DRG index

Defines the logic of DRG(s) 299-301 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 459.19 Postphlebetic syndrome with other complication (approximate)

Code annotations containing back-references to I87.099

Back-references to I87.0

• Type 1 Excludes: I87.3 Chronic venous hypertension (idiopathic) ("chronic venous hypertension due to deep vein thrombosis (I87.0-)")

Nearby codes

• I87.039 Postthrombotic syndrome with ulcer and inflammation of unspecified lower extremity
• I87.09 Postthrombotic syndrome with other complications
• I87.091 Postthrombotic syndrome with other complications of right lower extremity
• I87.092 Postthrombotic syndrome with other complications of left lower extremity
• I87.093 Postthrombotic syndrome with other complications of bilateral lower extremity
• I87.099 Postthrombotic syndrome with other complications of unspecified lower extremity (this code)
• I87.1 Compression of vein
• I87.2 Venous insufficiency (chronic) (peripheral)
• I87.3 Chronic venous hypertension (idiopathic)
• I87.30 Chronic venous hypertension (idiopathic) without complications
• I87.301 Chronic venous hypertension (idiopathic) without complications of right lower extremity