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Home / ICD-10-CM / Chapter 21: Factors influencing health status and contact with health services (Z00-Z99) / Persons with potential health hazards related to family and personal history and certain conditions influencing health status (Z77-Z99)

Z91.B: Personal risk factor of exposure to diethylstilbestrol

ICD-10-CM code Z91.B

New code · FY2026

Billable: use this code on claims.

New code, effective October 1, 2025 (FY2026).

Code breakdown

Z91.B

Z91CategoryPersonal risk factors, not elsewhere classified
BCharacter 4Personal risk factor of exposure to diethylstilbestrol

Coding notes

Inclusion terms

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

Code also

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

Excludes2 (from Z91)

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-)

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All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.