521.20 ABRASION NOS


Code Information

Diagnosis Code: 521.20

Short Description: Abrasion NOS

Long Description: Abrasion, unspecified

Code Classification:

  • Diseases of the digestive system (520–579)
    • Diseases of oral cavity, salivary glands, and jaws (520-529)
      • 521 Diseases of hard tissues of teeth
        • 521.20 Abrasion NOS

Code Version: 2015 ICD-9-CM


References to Index of Diseases and Injuries

The code 521.20 has the following ICD-9-CM references to the Index of Diseases and Injuries
  • Abrasion - see also Injury, superficial, by site
    • dental 521.20
      • extending into
        • dentine 521.22
        • pulp 521.23
      • generalized 521.25
      • limited to enamel 521.21
      • localized 521.24
    • teeth, tooth (dentifrice) (habitual) (hard tissues) (occupational) (ritual) (traditional) (wedge defect)� (see also Abrasion, dental) 521.20
  • Defect, defective 759.9
    • teeth, wedge 521.20
    • wedge, teeth (abrasion) 521.20
  • Injury 959.9
    • superficial 919
      • tooth, teeth (see also Abrasion, dental) 521.20

Crosswalk Information

The code 521.20 converts into the following ICD-10 code(s):
ICD-9 Code ICD-10 Code ICD-10 Description
521.20 Right Arrow K03.1 Abrasion of teeth
This ICD-9 to ICD-10 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-9 Code ICD-9 Description
521.00 Dental caries, unspecified
521.01 Dental caries limited to enamel
521.02 Dental caries extending into dentine
521.03 Dental caries extending into pulp
521.04 Arrested dental caries
521.05 Odontoclasia
521.06 Dental caries pit and fissure
521.07 Dental caries of smooth surface
521.08 Dental caries of root surface
521.09 Other dental caries
521.10 Excessive attrition, unspecified
521.11 Excessive attrition, limited to enamel
521.12 Excessive attrition, extending into dentine
521.13 Excessive attrition, extending into pulp
521.14 Excessive attrition, localized
521.15 Excessive attrition, generalized
521.21 Abrasion, limited to enamel
521.22 Abrasion, extending into dentine
521.23 Abrasion, extending into pulp
521.24 Abrasion, localized
521.25 Abrasion, generalized
521.30 Erosion, unspecified
521.31 Erosion, limited to enamel
521.32 Erosion, extending into dentine
521.33 Erosion, extending into pulp
521.34 Erosion, localized
521.35 Erosion, generalized
521.40 Pathological resorption, unspecified
521.41 Pathological resorption, internal
521.42 Pathological resorption, external
521.49 Other pathological resorption
521.5 Hypercementosis
521.6 Ankylosis of teeth
521.7 Intrinsic posteruptive color changes
521.81 Cracked tooth
521.89 Other specific diseases of hard tissues of teeth
521.9 Unspecified disease of hard tissues of teeth


This page was last updated on: 10/1/2014