Convert to ICD-10-CM: 
209.31 converts approximately to:
- 2015/16 ICD-10-CM C4A.0 Merkel cell carcinoma of lipOr: 
- 2015/16 ICD-10-CM C4A.10 Merkel cell carcinoma of unspecified eyelid, including canthusOr: 
- 2015/16 ICD-10-CM C4A.20 Merkel cell carcinoma of unspecified ear and external auricular canalOr: 
- 2015/16 ICD-10-CM C4A.30 Merkel cell carcinoma of unspecified part of faceOr: 
- 2015/16 ICD-10-CM C4A.39 Merkel cell carcinoma of other parts of face
 ICD-9-CM Volume 2 Index entries containing back-references to 
209.31:
- Carcinoma (M8010/3) - see also Neoplasm, by site, malignant