Skip to main content

M01.X12 vs M01.X19

M01.X12 (Direct infection of left shoulder in infectious and parasitic diseases classified elsewhere) compared with M01.X19 (Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere), from the official CMS tabular data. M01.X12 and M01.X19 code the same condition on opposite sides.

Relationship

Review

Laterality relationship

M01.X12
Left
Direct infection of left shoulder in infectious and parasitic diseases classified elsewhere
↔
M01.X19
Unspecified
Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere

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)

Can these codes be reported together?

Same condition, opposite side. M01.X12 and M01.X19 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.

Side by side

M01.X12Direct infection of left shoulder in infectious and parasitic diseases classified elsewhereM01.X19Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere
Billing statusBillableBillable
ClassificationM00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99)
DefinitionDirect infection of left shoulder in infectious and parasitic diseases classified elsewhere is a billable ICD-10-CM diagnosis code (M01.X12).Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere is a billable ICD-10-CM diagnosis code (M01.X19).
Code first
underlying disease, such as:
leprosy [Hansen's disease] (A30.-)
underlying disease, such as:
leprosy [Hansen's disease] (A30.-)
Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources