Authentication of Algorithm to Detect Metastases in Men with Prostate Cancer Using ICD-9 Codes

Table 2

Cases where metastases were missed by ICD-9 algorithms but confirmed on chart review.

(a) Cases where metastases were missed by algorithm A (ICD-9 198.5 or 198.3 or 197.0 or 197.7) but confirmed on chart review

Patient
40	Prostascint scan shows equivocal bone metastases; differential includes metastasis versus meningioma. Not biopsied.
207	Bone scan and MRI show bone metastases.
294	Bone scan and CT scan show bone metastases.

(b) Cases where metastases were missed by algorithm B (ICD-9 198.5) but confirmed on chart review

Patient
40	Prostascint scan shows equivocal bone metastases; differential includes metastasis versus meningioma. Not biopsied.
207	Bone scan and MRI show bone metastases.
294	Bone scan and CT scan show bone metastases.
3	MRI shows liver metastases.
50	MRI shows bone, brain, and lung metastases.
164	CT scan shows metastases to lung pleura.