E08 (Diabetes mellitus due to underlying condition) compared with M14.662 (Charcôt's joint, left knee), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Not coded here — these two are mutually exclusive.
“Charcôt's joint in diabetes mellitus (E08-E13 with .610)”
An Excludes1 note means the two conditions cannot occur together, so the pair should not be reported for the same encounter. The sole exception is when the conditions are documented as unrelated to each other.
Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a
No — do not report together. M14.662 carries an Excludes1 note covering E08: “Charcôt's joint in diabetes mellitus (E08-E13 with .610)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
| E08Diabetes mellitus due to underlying condition | M14.662Charcôt's joint, left knee | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Diabetes mellitus due to underlying condition is a non-billable ICD-10-CM category code (E08). | Charcôt's joint, left knee is a billable ICD-10-CM diagnosis code (M14.662). |
| Use additional code | code to identify control using: injectable non-insulin antidiabetic drugs (Z79.85) insulin (Z79.4) | — |
| Code first | the underlying condition, such as: congenital rubella (P35.0) | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources