Z89.521 (Acquired absence of right knee) compared with Z89.529 (Acquired absence of unspecified knee), from the official CMS tabular data. Z89.521 and Z89.529 code the same condition on opposite sides. MedCoder-derived
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. Z89.521 and Z89.529 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| Z89.521Acquired absence of right knee | Z89.529Acquired absence of unspecified knee | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | Z00-Z99 — Factors influencing health status and contact with health services | Z00-Z99 — Factors influencing health status and contact with health services |
| Definition | Acquired absence of right knee is a billable ICD-10-CM diagnosis code (Z89.521). | Acquired absence of unspecified knee is a billable ICD-10-CM diagnosis code (Z89.529). |
| Includes | amputation status postprocedural loss of limb post-traumatic loss of limb | amputation status postprocedural loss of limb post-traumatic loss of limb |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources