MCMCB Pro
Z91.B

Z91.BPersonal 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

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.

  • DESchild(daughter) (son)
  • DESsecond generation
  • Exposurerisk factor, personal, to diethylstilbestrol(DES) (in utero)

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).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.