ICD-10-CM
ICD-10 code for Periodontitis (chronic) (complex) (compound) (local) (simplex) acute: K05.20
The ICD-10-CM index points "Periodontitis (chronic) (complex) (compound) (local) (simplex) acute" to K05.20, Aggressive periodontitis, unspecified. K05.20 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
More specific codes in K05
A header groups codes and is not billed. A billable code is one you can report.
- K05Gingivitis and periodontal diseasesHeader
- K05.0Acute gingivitisHeader
- K05.00Acute gingivitis, plaque inducedBillable
- K05.01Acute gingivitis, non-plaque inducedBillable
- K05.1Chronic gingivitisHeader
- K05.10Chronic gingivitis, plaque inducedBillable
- K05.11Chronic gingivitis, non-plaque inducedBillable
- K05.2Aggressive periodontitisHeader
- K05.20Aggressive periodontitis, unspecifiedBillable
- K05.21Aggressive periodontitis, localizedHeader
- K05.211Aggressive periodontitis, localized, slightBillable
- K05.212Aggressive periodontitis, localized, moderateBillable
- K05.213Aggressive periodontitis, localized, severeBillable
- K05.219Aggressive periodontitis, localized, unspecified severityBillable
- K05.22Aggressive periodontitis, generalizedHeader
- K05.221Aggressive periodontitis, generalized, slightBillable
- K05.222Aggressive periodontitis, generalized, moderateBillable
- K05.223Aggressive periodontitis, generalized, severeBillable
- K05.229Aggressive periodontitis, generalized, unspecified severityBillable
- K05.3Chronic periodontitisHeader
- K05.30Chronic periodontitis, unspecifiedBillable
- K05.31Chronic periodontitis, localizedHeader
- K05.311Chronic periodontitis, localized, slightBillable
- K05.312Chronic periodontitis, localized, moderateBillable
- K05.313Chronic periodontitis, localized, severeBillable
- K05.319Chronic periodontitis, localized, unspecified severityBillable
- K05.32Chronic periodontitis, generalizedHeader
- K05.321Chronic periodontitis, generalized, slightBillable
- K05.322Chronic periodontitis, generalized, moderateBillable
- K05.323Chronic periodontitis, generalized, severeBillable
- K05.329Chronic periodontitis, generalized, unspecified severityBillable
- K05.4PeriodontosisBillable
- K05.5Other periodontal diseasesBillable
- K05.6Periodontal disease, unspecifiedBillable
Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
From K05. A note on a category applies to every code under it.
Excludes1
Excludes1 means these codes are not reported together.
From K05.2. A note on a category applies to every code under it.
Related conditions
Related pages
- K05.20 code detailsNotes, nearby codes, CMS-HCC group
- Category K05Every code under it
- Chapter 11Diseases of the digestive system
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Periodontitis (chronic) (complex) (compound) (local) (simplex) acute?
The ICD-10-CM index points "Periodontitis (chronic) (complex) (compound) (local) (simplex) acute" to K05.20, Aggressive periodontitis, unspecified. K05.20 is a billable code.
Is K05.20 billable?
Yes. K05.20 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to K05.20?
The CDC tabular list gives 3 Excludes1 notes (not coded together), 8 "use additional code" notes for K05.20 and the categories above it. They are listed on this page.
What chapter is K05.20 in?
Chapter 11. Diseases of the digestive system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.