ICD-10-CM 2027
ICD-10 code for Pest infestation
From the official ICD-10-CM alphabetic index entry “Infestation › pest”. Page updated September 29, 2026.
About coding Pest infestation
The ICD-10-CM code for Pest infestation is Z59.19 (Other inadequate housing).
Within Z59.1, choose Z59.19 (Other inadequate housing) only when documentation doesn't support a more specific option: unspecified (Z59.10), environmental temperature (Z59.11) and utilities (Z59.12).
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 Pest infestation ICD-10 codes
What is the ICD-10 code for Pest infestation?
- Z59.19 — Other inadequate housing.
Is Z59.19 billable?
- Yes. Z59.19 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z59.19 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 Z59.19 a CC or MCC?
- No. Z59.19 is neither a CC nor an MCC under MS-DRG v44.0.