ICD-10-CM > S00-T88 > S30-S39 > S31 > S31.0 > S31.05 > S31.050 S31.050 Open bite of lower back and pelvis without penetration into retroperitoneum Non-Billable/Non-Specific Applicable To Open bite of lower back and pelvis NOS Codes S31.050A..., initial encounterS31.050D..., subsequent encounterS31.050S..., sequela