Convert to ICD-10-CM: 
726.72 converts approximately to:
- 2015/16 ICD-10-CM M76.829 Posterior tibial tendinitis, unspecified leg
 ICD-9-CM Volume 2 Index entries containing back-references to 
726.72:
- Tendinitis, tendonitis (see also Tenosynovitis) 726.90  tibialis (anterior) (posterior) 726.72 tibialis (anterior) (posterior) 726.72