CPT® ---> ICD-9 Table

I've looked at two subscription services for converting CPT® codes to ICD-9, but before making that $$ commitment, are there any free lookup tables for practice or study?

re: CPT® ---> ICD-9 Table

AAPC: https://www.aapc.com/icd-10/codes/
UHC: https://icd10codelookup.smartbaselink.com/
ICD10data: http://www.icd10data.com/Convert