ICD-10-CM 2027
ICD-10 code for elevated titer screening
From the official ICD-10-CM alphabetic index entry “Screening (for) › elevated titer”. Page updated September 29, 2026.
About coding elevated titer screening
The ICD-10-CM code for elevated titer screening is Z13.89 (Encounter for screening for other disorder).
Within Z13.8, choose Z13.89 (other disorder) only when documentation doesn't support a more specific option: digestive system disorders (Z13.81), musculoskeletal disorder (Z13.82), respiratory disorder NEC (Z13.83), dental disorders (Z13.84), nervous system disorders (Z13.85) and disorder due to exposure to contaminants (Z13.88).
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 elevated titer screening ICD-10 codes
What is the ICD-10 code for elevated titer screening?
- Z13.89 — Encounter for screening for other disorder.
Is Z13.89 billable?
- Yes. Z13.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z13.89 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 Z13.89 a CC or MCC?
- No. Z13.89 is neither a CC nor an MCC under MS-DRG v44.0.