Is I82.56 a billable ICD-10-CM code?

No. I82.56 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I82.56 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89).

What cannot be coded together with I82.56?

I82.56 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I82.56 (I82.5) and apply to it just the same.

I82.56

I82.56 — Chronic embolism and thrombosis of calf muscular vein

Non-billable headerICD-10-CM

I82.56 is a non-billable header ICD-10-CM code for chronic embolism and thrombosis of calf muscular vein. It cannot be billed on its own: choose one of the more specific child codes below.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Chronic embolism and thrombosis of calf muscular vein NOS
Chronic embolism and thrombosis of gastrocnemial vein
Chronic embolism and thrombosis of soleal vein

Excludes1 inherited from the categories above I82.56

These are not written on I82.56, but they bind it: a note on a category applies to every code beneath it. Billing I82.56 with anything listed here is a denial.

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 I82.56

Also inherited, and the opposite of Excludes1: these conditions are not part of I82.56, but a patient can have both, so you may code both.

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

I82.56 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code history

I82.56 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead I82.56

4 child codes. Green means billable.

Related codes at this level

Codes that share I82.5. If I82.56 is not quite right, the correct code is usually one of these.

Questions about I82.56

Is I82.56 a billable ICD-10-CM code?: No. I82.56 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I82.56 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Diseases of veins, lymphatic vessels and lymph nodes, not elsewhere classified (I80-I89).
What cannot be coded together with I82.56?: I82.56 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I82.56 (I82.5) and apply to it just the same.