Just one ICD-9 code tells the story for chronic deep vein thrombosis (DVT) of the lower extremities. But you won’t be able to count on that code anymore when ICD-10 goes into effect on Oct. 1.
Instead, you’ll need to know a host of codes based on the specific vein. Read on to find out how you’ll code these cases later under the new code set.
Note Vein and Side
Currently, you describe chronic lower-extremity DVT using 453.5 (Other venous embolism and thrombosis: Chronic venous embolism and thrombosis of deep vessels of lower extremity)
This code crosswalks to the following options in ICD-10:
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I82.509 — Chronic embolism and thrombosis of unspecified deep veins of unspecified lower extremity
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I82.519 — ... unspecified femoral vein
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I82.529 — ... unspecified iliac vein
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I82.539 — ... unspecified popliteal vein
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I82.549 — ... unspecified tibial vein
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I82.599 — Chronic embolism and thrombosis of other specified deep vein of unspecified lower extremity
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I82.5Y9 — ... unspecified deep veins of unspecified proximal lower extremity
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I82.5Z9 — ... unspecified deep veins of unspecified distal lower extremity.
The term “unspecified” in these codes means that the surgeon didn’t specify laterality. If the surgical note identifies the chronic DVT in either the right or left lower extremity, you have many more codes to choose from.
Do this: If the opt note identifies laterality, you should report a code similar to one of the above-listed codes, except change the sixth digit to “1” for the right side, or “2” for the left side, or “3” for bilateral, instead of “9” for unspecified side.