Is Y66 a billable ICD-10-CM code?

Yes. Y66 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Y66 sit in the tabular list?

External causes of morbidity (V00-Y99), in the block Misadventures to patients during surgical and medical care (Y62-Y69).

What cannot be coded together with Y66?

Y66 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

Y66

Y66 — Nonadministration of surgical and medical care

Billable / specific codeICD-10-CM

Y66 is a billable, specific ICD-10-CM code for nonadministration of surgical and medical care. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

DNR status (Z66)
palliative care (Z51.5)

Inclusion terms

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

Premature cessation of surgical and medical care

Risk adjustment

Y66 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.

How Y66 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Y66.

Premature cessation surgical and medical care(of)
Nonadministration›surgical and medical care

Questions about Y66

Is Y66 a billable ICD-10-CM code?: Yes. Y66 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Y66 sit in the tabular list?: External causes of morbidity (V00-Y99), in the block Misadventures to patients during surgical and medical care (Y62-Y69).
What cannot be coded together with Y66?: Y66 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.