Z77.9 — Other contact with and (suspected) exposures hazardous to health
Z77.9 is a billable, specific ICD-10-CM code for other contact with and (suspected) exposures hazardous to health. It is valid for submission on a claim.
Risk adjustment
Z77.9 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.
Medicare coverage
Z77.9 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56448Billing and Coding: Breast Imaging Mammography/Breast Echography (Sonography)/Breast MRI/Ductography
How Z77.9 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 Z77.9.
- Contact›hazards to health NEC
- Exposure›hazards to health NEC
Related codes at this level
Codes that share Z77. If Z77.9 is not quite right, the correct code is usually one of these.
- Z77.0Contact with and (suspected) exposure to hazardous, chiefly nonmedicinal, chemicals
- Z77.1Contact with and (suspected) exposure to environmental pollution and hazards in the physical environment
- Z77.2Contact with and (suspected) exposure to other hazardous substances
- Z77.3Contact with and (suspected) exposure to war theater
Questions about Z77.9
- Is Z77.9 a billable ICD-10-CM code?
- Yes. Z77.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does Z77.9 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).