M23.001 (Cystic meniscus, unspecified lateral meniscus, left knee) compared with M23.002 (Cystic meniscus, unspecified lateral meniscus, unspecified knee), from the official CMS tabular data. M23.001 and M23.002 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. M23.001 and M23.002 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.
| M23.001Cystic meniscus, unspecified lateral meniscus, left knee | M23.002Cystic meniscus, unspecified lateral meniscus, unspecified knee | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Cystic meniscus, unspecified lateral meniscus, left knee is a billable ICD-10-CM diagnosis code (M23.001). | Cystic meniscus, unspecified lateral meniscus, unspecified knee is a billable ICD-10-CM diagnosis code (M23.002). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources