Is Z91.B a billable ICD-10-CM code?

Yes. Z91.B is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Z91.B sit in the tabular list?

Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).

Z91.B

Z91.B — Personal risk factor of exposure to diethylstilbestrol

Billable / specific codeICD-10-CMPOA exempt

Z91.B is a billable, specific ICD-10-CM code for personal risk factor of exposure to diethylstilbestrol. It is valid for submission on a claim.

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

, associated conditions, such as:
conditions classifiable to C50.-
osteoporosis (M80.-)
premature menopause (E28.31-)

Inclusion terms

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

DES daughter or son
Personal risk factor of exposure to DES
Personal risk factor of exposure to DES in utero
Second generation DES exposure

Excludes2 inherited from the categories above Z91.B

Also inherited, and the opposite of Excludes1: these conditions are not part of Z91.B, but a patient can have both, so you may code both.

Written on Z91 — Personal risk factors, not elsewhere classified

contact with and (suspected) exposures hazardous to health (Z77.-)
exposure to pollution and other problems related to physical environment (Z77.1-)
female genital mutilation status (N90.81-)
occupational exposure to risk factors (Z57.-)
personal history of physical injury and trauma (Z87.81, Z87.82-)

Risk adjustment

Z91.B 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 Z91.B 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 Z91.B.

DES›child(daughter) (son)
DES›second generation
Exposure›risk factor, personal, to diethylstilbestrol(DES) (in utero)

Code history

What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.

addedFY2024-FY2026
Personal risk factor of exposure to diethylstilbestrol

Related codes at this level

Codes that share Z91. If Z91.B is not quite right, the correct code is usually one of these.

Questions about Z91.B

Is Z91.B a billable ICD-10-CM code?: Yes. Z91.B is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Z91.B sit in the tabular list?: Factors influencing health status and contact with health services (Z00-Z99), in the block Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99).