I87.019 Postthrombotic syndrome with ulcer of unspecified lower extremity

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

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-)

Applies from I87.01 Postthrombotic syndrome with ulcer

Use additional code

• code to specify site and severity of ulcer (L97.-)

Risk adjustment (HCC)

• CMS-HCC V28: HCC 383 — Chronic Ulcer of Skin, Except Pressure, Not Specified as Through to Bone or Muscle
• CMS-HCC V22: HCC 107 — Vascular Disease with Complications
• ESRD V24: HCC 107

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 459.11 Postphlebetic syndrome with ulcer (approximate)

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

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to I87.019

Back-references to I87.01

• Code First: L97 Non-pressure chronic ulcer of lower limb, not elsewhere classified ("postphlebitic syndrome (I87.01-, I87.03-)")
• Code First: L97 Non-pressure chronic ulcer of lower limb, not elsewhere classified ("postthrombotic syndrome (I87.01-, I87.03-)")

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

• I87.009 Postthrombotic syndrome without complications of unspecified extremity
• I87.01 Postthrombotic syndrome with ulcer
• I87.011 Postthrombotic syndrome with ulcer of right lower extremity
• I87.012 Postthrombotic syndrome with ulcer of left lower extremity
• I87.013 Postthrombotic syndrome with ulcer of bilateral lower extremity
• I87.019 Postthrombotic syndrome with ulcer of unspecified lower extremity (this code)
• I87.02 Postthrombotic syndrome with inflammation
• I87.021 Postthrombotic syndrome with inflammation of right lower extremity
• I87.022 Postthrombotic syndrome with inflammation of left lower extremity
• I87.023 Postthrombotic syndrome with inflammation of bilateral lower extremity
• I87.029 Postthrombotic syndrome with inflammation of unspecified lower extremity