MCMedicalCodingSoftware
I82.509

I82.509: Chronic embolism and thrombosis of unspecified deep veins of unspecified lower extremity

Billable / specific codeICD-10-CM

I82.509 is a billable, specific ICD-10-CM code for chronic embolism and thrombosis of unspecified deep veins of unspecified lower extremity. It is valid for submission on a claim.

Check I82.509 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above I82.509

A category’s note binds every code beneath it.

Written on I82.50: Chronic embolism and thrombosis of unspecified deep veins of lower extremity

  • chronic embolism and thrombosis of unspecified deep veins of distal lower extremity (I82.5Z-)
  • chronic embolism and thrombosis of unspecified deep veins of proximal lower extremity (I82.5Y-)

Written on I82.5: Chronic embolism and thrombosis of deep veins of lower extremity

  • personal history of venous embolism and thrombosis (Z86.718)

Excludes2 inherited from the categories above I82.509

Not part of this code, but both may be coded when both are present.

Written on I82: Other venous embolism and thrombosis

  • venous embolism and thrombosis (of):
  • cerebral (I63.6, I67.6)
  • coronary (I21-I25)
  • intracranial and intraspinal, septic or NOS (G08)
  • intracranial, nonpyogenic (I67.6)
  • intraspinal, nonpyogenic (G95.1)
  • mesenteric (K55.0-)
  • portal (I81)
  • pulmonary (I26.-)

Risk adjustment

I82.509 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

  • HCC 267 Deep Vein Thrombosis and Pulmonary Embolism0.294 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

I82.509 is named in 8 Medicare coverage policies: 8 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A60255Billing and Coding: MolDX: Genetic Testing for Hereditary Thrombophilia
  • A60256Billing and Coding: MolDX: Genetic Testing for Hereditary Thrombophilia
  • A60271Billing and Coding: MolDX: Genetic Testing for Hereditary Thrombophilia
  • A60272Billing and Coding: MolDX: Genetic Testing for Hereditary Thrombophilia

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under I82.50

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.