ICD-10-CM 2027
ICD-10 code for rib acquired absence
From the official ICD-10-CM alphabetic index entry “Absence (of) (organ or part) (complete or partial) › rib (acquired)”. Page updated September 29, 2026.
About coding rib acquired absence
The ICD-10-CM code for rib acquired absence is Z90.89 (Acquired absence of other organs). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on Z90.89.
Within Z90.8, choose Z90.89 (other organs) only when documentation doesn't support a more specific option: spleen (Z90.81).
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.
More specific rib acquired absence codes (official index)
- congenital Q76.6 — Other congenital malformations of ribs
Common questions about rib acquired absence ICD-10 codes
What is the ICD-10 code for rib acquired absence?
- Z90.89 — Acquired absence of other organs. More specific codes apply when the documentation supports them: Q76.6.
What is the ICD-10 code for congenital rib acquired absence?
- Q76.6 — Other congenital malformations of ribs.
Is Z90.89 billable?
- Yes. Z90.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z90.89 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 Z90.89 a CC or MCC?
- No. Z90.89 is neither a CC nor an MCC under MS-DRG v44.0.