Coding patterns used by ophthalmologists for hydroxychloroquine retinal toxicity

Stephan Y Chiu1 Eye Monitoring Center, Kaiser Permanente Southern California, Baldwin Park, CA, USA, [email protected]

Jeremy W Shaw1 Eye Monitoring Center, Kaiser Permanente Southern California, Baldwin Park, CA, USA, [email protected]

Tiffany Q Luong2 Department of Research and Evaluation, Southern California Permanente Medical Group, Pasadena, CA, USA

Donald S Fong1 Eye Monitoring Center, Kaiser Permanente Southern California, Baldwin Park, CA, USA, [email protected];2 Department of Research and Evaluation, Southern California Permanente Medical Group, Pasadena, CA, USA;3 Department of Ophthalmology, Southern California Permanente Medical Group, Baldwin Park, CA, USA, [email protected]

Bobeck S Modjtahedi1 Eye Monitoring Center, Kaiser Permanente Southern California, Baldwin Park, CA, USA, [email protected];3 Department of Ophthalmology, Southern California Permanente Medical Group, Baldwin Park, CA, USA, [email protected]Correspondence[email protected]

Coding patterns used by ophthalmologists for hydroxychloroquine retinal toxicity

Table 1 ICD-9 codes used in patients using hydroxychloroquine (n=678)

Table 2 Sensitivity, specificity, PPV, and NPV for ICD-9 codes for toxic maculopathy for identifying patients with hydroxychloroquine toxicity

Table 3 Patients with hydroxychloroquine toxicity and their associated ICD-9 code(s),Table Footnotea n=53

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Coding patterns used by ophthalmologists for hydroxychloroquine retinal toxicity

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Table 1 ICD-9 codes used in patients using hydroxychloroquine (n=678)

Table 2 Sensitivity, specificity, PPV, and NPV for ICD-9 codes for toxic maculopathy for identifying patients with hydroxychloroquine toxicity

Table 3 Patients with hydroxychloroquine toxicity and their associated ICD-9 code(s),Table Footnotea n=53

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