ICD-10-CM 2027
ICD-10 code for arsenic exposure
From the official ICD-10-CM alphabetic index entry “Exposure (to) › arsenic”. Page updated September 29, 2026.
About coding arsenic exposure
The ICD-10-CM code for arsenic exposure is Z77.010 (Contact with and (suspected) exposure to arsenic).
Within Z77.01 (contact with and (suspected) exposure to hazardous metals), Z77.010 is specifically for contact with and (suspected) exposure to arsenic. Related codes cover lead (Z77.011), uranium (Z77.012), gadolinium (Z77.013) and other hazardous metals (Z77.018).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about arsenic exposure ICD-10 codes
What is the ICD-10 code for arsenic exposure?
- Z77.010 — Contact with and (suspected) exposure to arsenic.
Is Z77.010 billable?
- Yes. Z77.010 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z77.010 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z77.010 a CC or MCC?
- No. Z77.010 is neither a CC nor an MCC under MS-DRG v44.0.