M23.006 (Cystic meniscus, unspecified meniscus, right knee) compared with M23.009 (Cystic meniscus, unspecified meniscus, unspecified knee), from the official CMS tabular data. M23.006 and M23.009 code the same condition on opposite sides.
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. M23.006 and M23.009 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.
| M23.006Cystic meniscus, unspecified meniscus, right knee | M23.009Cystic meniscus, unspecified meniscus, unspecified knee | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the musculoskeletal system and connective tissue | M00-M99 — Diseases of the musculoskeletal system and connective tissue |
| Definition | Cystic meniscus, unspecified meniscus, right knee is a billable ICD-10-CM diagnosis code (M23.006). | Cystic meniscus, unspecified meniscus, unspecified knee is a billable ICD-10-CM diagnosis code (M23.009). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources