ICD-10-CM > M00-M99 > M00-M02 > M00 > M00.1 > M00.17 M00.17 Pneumococcal arthritis, ankle and foot Non-Billable/Non-Specific Applicable To Pneumococcal arthritis, tarsus, metatarsus and phalanges Codes M00.171Pneumococcal arthritis, right ankle and footM00.172Pneumococcal arthritis, left ankle and footM00.179Pneumococcal arthritis, unspecified ankle and foot