ICD-10 code for Crowding

The ICD-10-CM code for Crowding is M26.31 (Crowding of fully erupted teeth).

Within M26.3 (anomalies of tooth position of fully erupted tooth or teeth), M26.31 is specifically for Crowding of fully erupted teeth. Related codes cover unspecified anomaly of tooth position of fully erupted tooth or teeth (M26.30), excessive spacing of fully erupted teeth (M26.32), horizontal displacement of fully erupted tooth or teeth (M26.33), vertical displacement of fully erupted tooth or teeth (M26.34), rotation of fully erupted tooth or teeth (M26.35), insufficient interocclusal distance of fully erupted teeth (ridge) (M26.36), excessive interocclusal distance of fully erupted teeth (M26.37) and other anomalies of tooth position of fully erupted tooth or teeth (M26.39).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 011 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with MCC, relative weight 5.6154), DRG 012 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy with CC, relative weight 4.381), DRG 013 (Tracheostomy for Face, Mouth and Neck Diagnoses or Laryngectomy without CC/MCC, relative weight 2.7307), DRG 157 (Dental and Oral Diseases with MCC, relative weight 1.809), DRG 158 (Dental and Oral Diseases with CC, relative weight 0.9366) and DRG 159 (Dental and Oral Diseases without CC/MCC, relative weight 0.6893), in Pre-MDC and MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.