Which coding system was used for diagnoses on claims prior to ICD-10-CM, as in 2013?

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Multiple Choice

Which coding system was used for diagnoses on claims prior to ICD-10-CM, as in 2013?

Explanation:
Diagnoses on claims before ICD-10-CM were coded with ICD-9-CM. This older diagnosis coding system was used to indicate patient conditions on claims, while procedures and services are described with CPT, and HCPCS covers additional procedure and supply codes. ICD-10-CM is a later, more detailed diagnosis coding system that was implemented after 2013, so in 2013 the standard for diagnosis coding on claims was ICD-9-CM.

Diagnoses on claims before ICD-10-CM were coded with ICD-9-CM. This older diagnosis coding system was used to indicate patient conditions on claims, while procedures and services are described with CPT, and HCPCS covers additional procedure and supply codes. ICD-10-CM is a later, more detailed diagnosis coding system that was implemented after 2013, so in 2013 the standard for diagnosis coding on claims was ICD-9-CM.

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