Table 1.

SEER-Medicare claims codes

Variable	Source	Codes
Adenocarcinoma diagnosis	ICD-0–3 codes	8050, 8140–8147, 8160–8162, 8180–8221, 8250–8507, 8514, 8520–8551, 8560, 8570–8574, 8576, 8940–8941
Squamous cell carcinoma diagnosis	ICD-0–3 codes	8070–8078, 8083, 8084
Surgery	CPT or ICD-9 Procedure Codes	43100, 43101, 43107, 43108, 43112, 43113, 43116, 43117, 43118, 43119, 43121, 43122, 43123, 43124, 43217, 43216, 43228, 43250, 43251, 43257, 43258, 96570, 96571, 42.33
Radiation	CPT or ICD-9 Procedure Codes	ICD-9-CM: V58.0, 92.21–92.29
		CPT: 7331–7336, 73399, 77400–77499, 77750–77799
		Revenue Center: 0330, 0333, 0339
Chemotherapy	CPT or ICD-9 Procedure Codes	ICD-9-CM: V58.1, 99.25
		HCPCS: C1166, C1168, C1179, C9110, C9205, C9207, C9213-C9216, C9411, C9414-C9419, C942x, C9430-C9438, G0345-G0363, J9000-J9999, Q0083-Q0085
		CPT: 9651x-9654x, 964xx
		Revenue Center 0331, 0332, 0335