523 Gingival and periodontal diseases (523.00-523.9) ICD-9-CM
The 523.00-523.9 block classified 523 gingival and periodontal diseases with 21 legacy diagnosis codes. None remain valid for claim submission; each code below links to its reference page with the official ICD-10-CM replacement under the CMS General Equivalence Mappings.
Retired Code Set
ICD-9-CM stopped being valid for U.S. claims with dates of service on or after October 1, 2015, when ICD-10-CM replaced it. Use this index for historical lookups and crosswalking; for current coding, start from the ICD-10-CM codes list or the ICD-9 / ICD-10 converter.
Legacy Codes in the 523.00-523.9 Block 21 codes
None of these codes remain valid for claim submission. Each code page shows its ICD-10-CM replacement under the CMS General Equivalence Mappings.
- 523.00 Acute gingititis, plaque
- 523.01 Ac gingivitis,nonplaque
- 523.10 Chronc gingititis,plaque
- 523.11 Chr gingivitis-nonplaque
- 523.20 Gingival recession NOS
- 523.21 Gingival recess-minimal
- 523.22 Gingival recess-moderate
- 523.23 Gingival recess-severe
- 523.24 Gingival recession-local
- 523.25 Gingival recess-general
- 523.30 Aggres periodontitis NOS
- 523.31 Aggres periodontitis,loc
- 523.32 Aggres periodontitis,gen
- 523.33 Acute periodontitis
- 523.40 Chronc periodontitis NOS
- 523.41 Chr periodontitis, local
- 523.42 Chron periodontitis,gen
- 523.5 Periodontosis
- 523.6 Accretions on teeth
- 523.8 Periodontal disease NEC
- 523.9 Gingiv/periodont dis NOS
Questions About This Page
Are the 523.00-523.9 codes still billable?
No. Every code in this block became invalid for U.S. claims after September 30, 2015. Each code page linked above shows the ICD-10-CM replacement CMS assigned in the General Equivalence Mappings, and the ICD-9 / ICD-10 converter translates any of them directly.
What did the 523.00-523.9 block classify?
The block classified 523 gingival and periodontal diseases with 21 codes in the final ICD-9-CM release. It sat under Diseases of the digestive system (520–579) in the legacy hierarchy.
Related References
Source: final CMS ICD-9-CM release (version date October 1, 2014). Retired from U.S. claims after September 30, 2015.
