ICD-10-CM 2027
ICD-10 code for sibling rivalry
From the official ICD-10-CM alphabetic index entry “Sibling rivalry”. Page updated September 29, 2026.
About coding sibling rivalry
The ICD-10-CM code for sibling rivalry is Z62.891 (Sibling rivalry).
Within Z62.89 (other specified problems related to upbringing), Z62.891 is specifically for sibling rivalry. Related codes cover parent-child estrangement NEC (Z62.890), Runaway [from current living environment] (Z62.892) and other specified problems related to upbringing (Z62.898).
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 sibling rivalry ICD-10 codes
What is the ICD-10 code for sibling rivalry?
- Z62.891 — Sibling rivalry.
Is Z62.891 billable?
- Yes. Z62.891 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z62.891 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 Z62.891 a CC or MCC?
- No. Z62.891 is neither a CC nor an MCC under MS-DRG v44.0.