Excludes1 pair
C46.1 vs C47-
C46.1 and C47 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on C47
Kaposi's sarcoma of soft tissue (C46.1)
C46.1
Kaposi's sarcoma of soft tissue
Billable
- Chapter 2
- Neoplasms
- Section
- C45-C49
Use when the record says
- Kaposi's sarcoma of blood vessel
- Kaposi's sarcoma of connective tissue
- Kaposi's sarcoma of fascia
- Kaposi's sarcoma of ligament
- Kaposi's sarcoma of lymphatic(s) NEC
- Kaposi's sarcoma of muscle
Indexed under
- Kaposi's › sarcoma › connective tissue
- Sarcoma › Kaposi's › connective tissue
C47
Malignant neoplasm of peripheral nerves and autonomic nervous system
Not billable
- Chapter 2
- Neoplasms
- Section
- C45-C49
Use when the record says
- malignant neoplasm of sympathetic and parasympathetic nerves and ganglia
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027