Convert ICD-10 C12 to ICD-9

ICD-10 code C12, Malignant neoplasm of pyriform sinus, crosswalked to ICD-9 with the official CMS General Equivalence Mappings. Convert another code below.

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Official CMS General Equivalence Mappings Final GEMs release (FY 2018) Maps in both directions

2 candidate ICD-9 mappings for ICD-10 C12

From the official CMS General Equivalence Mappings. Review each mapping's flags before selecting the final code. Convert another code

ICD-10 code C12, "Malignant neoplasm of pyriform sinus", maps to ICD-9 code 148.1, "Mal neo pyriform sinus". This mapping carries no qualifying flags, so it is considered an exact equivalent. The GEMs list 2 candidate mappings for this code. The crosswalk comes from the official CMS General Equivalence Mappings.

ICD‑10 Code

C12

Malignant neoplasm of pyriform sinus

ICD‑9 Code

148.1

Mal neo pyriform sinus

– This is a direct match with no additional mapping qualifiers.

ICD‑10 Code

I82.C12

Acute embolism and thrombosis of left internal jugular vein

ICD‑9 Code

453.86

Ac embl internl jug vein

Approximate Flag – This ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option and may not fully capture the original diagnosis.

See everything about the source code, including its category, synonyms, and history: open the C12 code page → Or run the reverse crosswalk: convert 148.1 back to ICD-10 →